Potential Contamination of Mercury from Artisanal Gold Mining
•
3 likes•587 views
This presentation had been presented in the 9th International Conference of Mercury as Global Pollutan (ICMGP) at Guiyang China, 7-12 June, 2009 (http://www.mercury.2009.org)
Report
Share
Report
Share
![Objective of the Study ,[object Object],[object Object],[object Object],[object Object],General: To assess potential contamination of Hg emitted from an artisanal gold mining area](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Recommended
Caramanna nott
This document summarizes a presentation about using natural CO2 vents as analogues to study potential environmental effects of CO2 leakage from carbon storage. It describes several examples of terrestrial and marine natural CO2 vents, including sites in Germany, Italy, and Japan. Parameters that can be investigated using these analogues include CO2 concentrations, chemical impacts on pH and metal mobilization, and biological impacts on microbes, vegetation, and animals. The presentation emphasizes that natural analogues provide realistic boundary conditions to validate experimental and modeling results and to test monitoring techniques.
IRJET- Study of a Metropolitan River: Mithi
The 15km long Mithi River in Mumbai is highly polluted. Testing showed most water quality parameters exceeded standards at three locations along the river. Biological oxygen demand and chemical oxygen demand were highest in pre-monsoon periods while dissolved oxygen levels were below the minimum for aquatic life. Pollution levels were generally highest near dense slums and where industrial waste entered the river. To improve conditions, strict litter laws, plastic removal, alternative disposal for slum and industrial waste, improved sanitation, and halting encroachment are recommended. The river is degraded but conservation efforts could help restore it.
carbon monoxide
Carbon monoxide (CO) is an odorless, colorless, and tasteless gas that can be deadly to humans even at low concentrations. It reduces the blood's ability to carry oxygen throughout the body. Common sources of CO include internal combustion engines, burning of fossil fuels, and indoor heating systems. CO poisoning causes headaches, fatigue, and can lead to death at high concentrations. Detection and analysis methods include gravimetric, colorimetric, electrochemical, and chemical techniques. The main control methods are ensuring proper combustion and use of catalytic converters to convert CO into less harmful carbon dioxide.
Monitoring and analysis of a novel highway runoff
This document summarizes a study on monitoring a novel highway runoff treatment system. Laboratory column tests showed that certain materials like BOF slag and goethite soil can remove over 30% of heavy metals from runoff. A field facility was set up to test these materials' performance on capturing and treating runoff. Preliminary field results showed the system could intercept over 260,000L of runoff and melt water from storms. Water quality monitoring of the underdrains is ongoing to assess pollutant removal rates under real-world conditions. Further testing is still needed to better understand the system's adsorption properties and ability to attenuate peak runoff flows.
Separation, characterization and leaching behaviors of heavy metals in contam...
This document discusses a study on the separation, characterization, and leaching behaviors of heavy metals in contaminated river sediments. The study involved analyzing sediment samples from rivers in central Taiwan to understand the concentration and chemical forms of heavy metals present, including copper, lead, zinc, nickel, and chromium. Sequential extraction tests showed most metals exceeded sediment quality standards. Acid washing experiments found heavy metal removal efficiencies were highest for nickel, zinc, lead, copper, and chromium when washed with HCl for 120 minutes. Results indicate some metals exist in residual forms in sediments but become more exchangeable after washing, increasing bioavailability.
THESIS
Illegal small-scale gold mining is negatively impacting the water quality of the Birim River in Ghana. Samples taken from downstream and middle sections of the river showed higher levels of turbidity, color, mercury and other parameters compared to upstream sections without mining. This suggests that mining activities are contaminating the river water. Continued use of the polluted water poses health risks and could hurt crop yields for communities that rely on the river. Stricter enforcement is needed to stop mining in the river and provide alternative livelihoods, while further studies will monitor the long term effects.
NBV Marlea Wagelmans
This document summarizes the results of an ecological risk assessment conducted at two contaminated sites in the Netherlands using a Triad approach. At the first site, a river bank, sediment sampling found high concentrations of metals, PAHs and PCBs. Toxicity tests showed negative effects in the tidal zone but moderate effects in the reed zone, indicating remediation was needed for the tidal zone. The second site, a former military airport, had high PAH concentrations but toxicity tests showed no negative effects, so no urgent remediation was required. The document notes some remaining challenges for ecological risk assessment including understanding effects at higher biological levels and assessing chronic or combined pollution impacts.
IRJET- Waste water treatment by Tea Waste, Alum, Pre-Aluminium Chloride
This document summarizes a study on using tea waste, alum, and pre-aluminum chloride to treat wastewater from Tighra reservoir in Gwalior, India. Heavy metals like chromium, lead, cadmium, and nickel were found in high concentrations in the reservoir water due to religious practices of immersing idols. The study collected and processed tea waste to produce an adsorbent to remove heavy metals. Testing of water samples before and after treatment showed the tea waste adsorbent was able to remove up to 25.6% of heavy metals. The results indicate tea waste has potential for wastewater treatment and removing pollutants from water bodies.
Recommended
Caramanna nott
This document summarizes a presentation about using natural CO2 vents as analogues to study potential environmental effects of CO2 leakage from carbon storage. It describes several examples of terrestrial and marine natural CO2 vents, including sites in Germany, Italy, and Japan. Parameters that can be investigated using these analogues include CO2 concentrations, chemical impacts on pH and metal mobilization, and biological impacts on microbes, vegetation, and animals. The presentation emphasizes that natural analogues provide realistic boundary conditions to validate experimental and modeling results and to test monitoring techniques.
IRJET- Study of a Metropolitan River: Mithi
The 15km long Mithi River in Mumbai is highly polluted. Testing showed most water quality parameters exceeded standards at three locations along the river. Biological oxygen demand and chemical oxygen demand were highest in pre-monsoon periods while dissolved oxygen levels were below the minimum for aquatic life. Pollution levels were generally highest near dense slums and where industrial waste entered the river. To improve conditions, strict litter laws, plastic removal, alternative disposal for slum and industrial waste, improved sanitation, and halting encroachment are recommended. The river is degraded but conservation efforts could help restore it.
carbon monoxide
Carbon monoxide (CO) is an odorless, colorless, and tasteless gas that can be deadly to humans even at low concentrations. It reduces the blood's ability to carry oxygen throughout the body. Common sources of CO include internal combustion engines, burning of fossil fuels, and indoor heating systems. CO poisoning causes headaches, fatigue, and can lead to death at high concentrations. Detection and analysis methods include gravimetric, colorimetric, electrochemical, and chemical techniques. The main control methods are ensuring proper combustion and use of catalytic converters to convert CO into less harmful carbon dioxide.
Monitoring and analysis of a novel highway runoff
This document summarizes a study on monitoring a novel highway runoff treatment system. Laboratory column tests showed that certain materials like BOF slag and goethite soil can remove over 30% of heavy metals from runoff. A field facility was set up to test these materials' performance on capturing and treating runoff. Preliminary field results showed the system could intercept over 260,000L of runoff and melt water from storms. Water quality monitoring of the underdrains is ongoing to assess pollutant removal rates under real-world conditions. Further testing is still needed to better understand the system's adsorption properties and ability to attenuate peak runoff flows.
Separation, characterization and leaching behaviors of heavy metals in contam...
This document discusses a study on the separation, characterization, and leaching behaviors of heavy metals in contaminated river sediments. The study involved analyzing sediment samples from rivers in central Taiwan to understand the concentration and chemical forms of heavy metals present, including copper, lead, zinc, nickel, and chromium. Sequential extraction tests showed most metals exceeded sediment quality standards. Acid washing experiments found heavy metal removal efficiencies were highest for nickel, zinc, lead, copper, and chromium when washed with HCl for 120 minutes. Results indicate some metals exist in residual forms in sediments but become more exchangeable after washing, increasing bioavailability.
THESIS
Illegal small-scale gold mining is negatively impacting the water quality of the Birim River in Ghana. Samples taken from downstream and middle sections of the river showed higher levels of turbidity, color, mercury and other parameters compared to upstream sections without mining. This suggests that mining activities are contaminating the river water. Continued use of the polluted water poses health risks and could hurt crop yields for communities that rely on the river. Stricter enforcement is needed to stop mining in the river and provide alternative livelihoods, while further studies will monitor the long term effects.
NBV Marlea Wagelmans
This document summarizes the results of an ecological risk assessment conducted at two contaminated sites in the Netherlands using a Triad approach. At the first site, a river bank, sediment sampling found high concentrations of metals, PAHs and PCBs. Toxicity tests showed negative effects in the tidal zone but moderate effects in the reed zone, indicating remediation was needed for the tidal zone. The second site, a former military airport, had high PAH concentrations but toxicity tests showed no negative effects, so no urgent remediation was required. The document notes some remaining challenges for ecological risk assessment including understanding effects at higher biological levels and assessing chronic or combined pollution impacts.
IRJET- Waste water treatment by Tea Waste, Alum, Pre-Aluminium Chloride
This document summarizes a study on using tea waste, alum, and pre-aluminum chloride to treat wastewater from Tighra reservoir in Gwalior, India. Heavy metals like chromium, lead, cadmium, and nickel were found in high concentrations in the reservoir water due to religious practices of immersing idols. The study collected and processed tea waste to produce an adsorbent to remove heavy metals. Testing of water samples before and after treatment showed the tea waste adsorbent was able to remove up to 25.6% of heavy metals. The results indicate tea waste has potential for wastewater treatment and removing pollutants from water bodies.
Kupryianchyk: Understanding bioaccumulation and biotransformation processes o...
Kupryianchyk: Understanding bioaccumulation and biotransformation processes o...Geological Survey of Sweden
This study analyzed contaminants in sediments from fiber bank areas in the northern Baltic Sea. The objectives were to understand bioaccumulation and biotransformation of contaminants like PCBs, understand how sediment properties affect these processes, and determine the effects of species-specific traits on bioaccumulation. Sediments and biota were sampled from three locations and analyzed for contaminant concentrations and profiles. Results showed the fiber bank sediments had high PCB concentrations and acted as the primary source for bioaccumulation in invertebrates. Chiral PCB analysis provided evidence of enantioselective biotransformation occurring in some species. The findings improve understanding of contaminant fate in fiber bank sediments and food webs in the northern Baltic Sea16_Red Lion_IWWD1115
The U.S. EPA and state agencies have mandated reductions in toxic copper levels in bays and harbors due to copper leaching from copper-based boat paints. Current remediation methods have seen limited success. Scientists at Red Lion Chem Tech are testing two new approaches - submersible ballasts containing copper-binding adsorbents, and an industrial pump-and-treat system passing water through test columns. In controlled studies, both methods removed over 94% of copper from water samples from San Diego Bay in a single treatment, with the pump-and-treat system completing treatment in under a minute versus 96 hours for the ballasts. Further field tests of these promising rapid remediation methods could help affected
CL_LOIPOSTERFINAL
This document summarizes loss on ignition (LOI) results from a sediment core collected from Crystal Lake in western Ohio. LOI analysis was conducted on three additional drives from the core to further investigate quasi-cycles in organic material and calcium carbonate levels over time. The results provide evidence of fluctuating organic content between 4-18% over depths of 1200-1550cm. Calcium carbonate levels were highest from 1100-1460cm and decreased below 1460cm, potentially indicating a change in the carbon cycle. Continued LOI and other analyses at this site will improve understanding of past climate changes in the region.
Sc 1000 cefas reg 25334
Gemtek Products PLC is registered to produce drilling mud additives for use in oil and gas operations. The product registration is certified by the Centre for Environment Fisheries and Aquaculture Science and expires on May 3rd, 2016. Test results show the product has low aquatic toxicity and biodegrades within 15.2 days.
Conceptual Site Model Development and Environmental Molecular Diagnostics
This was presented at the 2019 Clemson Hydrogeology Symposium. Its full title is Conceptual Site Model Development and Environmental Molecular Diagnostics Use for PlumeStop(R) Liquid Activated Carbon(TM) Application at a Trichlorofluoromethane Groundwater Plume.
Undergrad defense powerpoint
This document summarizes research assessing the source rock potential of organic-rich shales using solid-state 13C NMR spectroscopy and Rock-Eval pyrolysis. The objectives were to relate the chemical structure of kerogen to its pyrolysis behavior and develop a predictive model for hydrocarbon potential. Samples from the Eagle Ford Shale were analyzed using 13C NMR to quantify functional groups. Rock-Eval pyrolysis provided data on hydrocarbon content and quality. Strong correlations were found between kerogen structure parameters from NMR and pyrolysis yields, supporting the hypothesis that hydrocarbon generation potential is linked to kerogen chemistry.
Stormwater pond ppt (1)
The SAJO Consulting Group was commissioned by Quintin Rochfort of Environment Canada to investigate contaminants in the Rouge River stormwater pond and evaluate its environmental condition. They collected water, sediment, and pore water samples from 4 sites in the pond during fall and spring seasons. Analysis found high concentrations of pollutants like road salts, cyanide, PAHs and phosphorus throughout the pond, especially at site 4. Based on the poor water and sediment quality, high contaminant levels, and unsuitable conditions for aquatic life, the overall pond condition was deemed poor. The report recommended draining the pond and excavating/disposing of contaminated sediment, especially from site 4, to improve conditions.
Leachate project presentation Engineers Ireland Talk
This document examines landfill leachate management practices in Ireland. It finds that while landfill practices have improved, co-treating leachate with municipal wastewater poses challenges. Studies of two WWTPs showed leachate loading regimes were generally appropriate but seasonal variation in leachate volumes risks overloading plants. Nitrogen loading from leachate needs consideration and on-site storage is recommended to minimize risks to WWTP performance.
David diaspora
The document summarizes research on measuring concentrations of trace metals in water samples from the Ialomița and Prut Rivers in Romania. Samples were taken at various points along the rivers and during different seasons. Techniques like ICP-AES and differential pulse anodic stripping voltammetry using a mercury film electrode were used to detect metals like iron, selenium, copper, zinc, lead, cadmium, mercury, and arsenic. The results showed seasonal variations in metal concentrations and bioaccumulation in aquatic organisms.
Sardinia 2015: Impact of municipal solid waste landfill leachate loading on t...
Impact of municipal solid waste landfill leachate loading on the performance of two wastewater treatment plants.
Assingment 01 p1
Summary of paper, Estimation and Distribution of Nitrate Contamination in
Groundwater of Wah Town, its Causes and Management
Newsletter EPA Landfill Leachate Project
Internationally, poor landfill leachate management has caused groundwater and environmental pollution. In Ireland, 95% of landfill leachate is sent to municipal wastewater treatment plants for treatment, but increasingly stringent regulations have increased treatment costs. As landfills can generate leachate for over 30 years after closure, sustainable long-term leachate management is needed. This project aims to characterize Irish landfill leachates and evaluate the impacts and costs of on-site versus off-site leachate treatment to develop management guidelines. Preliminary results found most leachate parameters exceeded levels that can inhibit wastewater treatment.
Optimum GAC Selection for NOM Removal from High TOC Upland Waters
This document discusses selecting the optimal granular activated carbon (GAC) for removing natural organic matter (NOM) from upland waters with high total organic carbon. It aims to link NOM characteristics to GAC physicochemical properties to establish the most effective GAC media. Testing of four commercial GACs with real upland water from two water treatment works found the highest adsorption capacity for NOM varied between sites, with GAC C performing best at one site and GAC A at the other. Further analysis of NOM composition and fractionation is needed to fully characterize performance differences between GAC types.
Rainfall and Chemical Weathering of Basalt Facade at Puebla Cathedral, Mexico
Pollutant emissions from anthropogenic activities have modified frequency, amount and chemical quality of rainfall at a specific site. Interactions of atmospheric dust with rainfall have induced weathering at Puebla Cathedral basalt facade. Chemical damage in exposed construction materials becomes evident as crusts, color bleaching, or salt deposits either into the stone or onto its surface. This work presents data on atmospheric dust (2012), rainfall (2009, 2011, 2012 years) and weathered basalt samples collected at downtown Puebla. Samples were characterized by gravimetric and spectrophotometric techniques for anions and metals. Results have provided evidence that atmospheric dust contains carbonates (>300 mg/g), sulfate and chloride (< 10 mg/g); otherwise main anions in rain samples are bicarbonate>chloride>sulfate, this order is reproduced in the results of most weathered basalt samples.
Chris_Pertsc_Abstract
The document describes the development of an autonomous in-situ total phosphorus analyzer for use in aquatic environments. The analyzer uses the colorimetric stannous chloride-molybdenum blue method to measure orthophosphate, organic phosphate, and assimilated phosphate in algal biomass. A fluorinated ethylene propylene tubing digester catalyzed by UV light and heated by a nickel chromium wire is developed to digest organic phosphorus into a measurable form. Water samples and reagents are delivered using microfluidics and syringes controlled by linear actuators. Absorbance measurements are taken using a photodiode and LED in a flow cell. Validation tests achieved a correlation of r2=0
Water quality testing july 2012
The Nature Foundation tested water quality at 7 sites on St. Maarten in July 2012. Tests measured nitrates, phosphates, nitrogen, dissolved oxygen, pH, and temperature. The Great Salt Pond and Fresh Pond had relatively high levels of nitrates and phosphates, indicating pollution. The Great Salt Pond also had elevated nitrogen levels that could threaten aquatic life. Overall water quality was fair to poor at some sites, suggesting a need for improved wastewater management.
Rq evaluation
This document presents toxicity data for several metal species and chemicals using different species groups. It provides no-observed-effect concentration (NOEC) and lethal concentration 50% (LC50) toxicity values for copper, cadmium, and chlordane using algae, crustaceans, and fish species. It then calculates risk quotients (RQs) by dividing predicted environmental concentrations (PECs) by predicted no-effect concentrations (PNECs), finding that cadmium has the highest RQ and potential risk of the three chemicals analyzed.
Biological Nutrient Removal Applications for Monitoring ORP | YSI
Biological nutrient removal applications for monitoring oxidation reduction potential in wastewater covers four main topics: the science of ORP/Redox, putting ORP to use, applications and sensor care.
Doctorate Dissertation
Ecotoxicity & Risk Assessment of Mercury in the Grand Bay National Estuarine Research Reserve:
Profiling Mercury Distribution in the NERR by Cold Vapor Atomic Absorption Spectrometery
Doctorate dissertation
The document summarizes a dissertation proposal that aims to assess mercury distribution and potential health risks in the Grand Bay National Estuarine Research Reserve. The study will measure mercury levels in fish, water, and sediment samples collected from the reserve using cold vapor atomic absorption spectrometry. The results will help inform policies for managing mercury contamination and assess spatial and temporal trends and risks from mercury exposure.
Article ok
This document describes a new method for extracting trace amounts of mercury from natural waters using silver and gold nanoparticles impregnated in nylon membrane filters. Water samples are treated to convert all mercury species to Hg2+ and then reduced to elemental Hg0. The mercury is then collected on the nanoparticle-coated membrane filters during filtration. Mercury levels are then determined by thermal desorption from the filters using a mercury analyzer. This new method achieves a lower limit of detection of 0.04 ng compared to the traditional cold vapor generation method, and avoids additional sample treatment and contamination risks. Mercury was also found to be stable on the filters for at least 5 months without loss.
2-18 joac print
This document analyzes heavy metal contamination levels in sediments from the Yamuna River in Agra, India. Heavy metal concentrations (of Cr, Cu, Ni, Pb, Zn, Cd, Mn, Co, Fe) were measured at 12 sites along the river. Concentrations of Cr, Cu, Ni, Pb, Zn, Cd were found to be higher than levels from other river basins worldwide and in India. Comparison to effect guidelines showed concentrations above levels that could negatively impact aquatic life. Statistical analysis revealed correlations between certain metal pairs, possibly indicating common sources like urban runoff. Various indices were calculated to assess environmental risk and sediment pollution levels, showing sediments ranging from moderately to dangerously polluted. Anthropogenic
More Related Content
What's hot
Kupryianchyk: Understanding bioaccumulation and biotransformation processes o...
Kupryianchyk: Understanding bioaccumulation and biotransformation processes o...Geological Survey of Sweden
This study analyzed contaminants in sediments from fiber bank areas in the northern Baltic Sea. The objectives were to understand bioaccumulation and biotransformation of contaminants like PCBs, understand how sediment properties affect these processes, and determine the effects of species-specific traits on bioaccumulation. Sediments and biota were sampled from three locations and analyzed for contaminant concentrations and profiles. Results showed the fiber bank sediments had high PCB concentrations and acted as the primary source for bioaccumulation in invertebrates. Chiral PCB analysis provided evidence of enantioselective biotransformation occurring in some species. The findings improve understanding of contaminant fate in fiber bank sediments and food webs in the northern Baltic Sea16_Red Lion_IWWD1115
The U.S. EPA and state agencies have mandated reductions in toxic copper levels in bays and harbors due to copper leaching from copper-based boat paints. Current remediation methods have seen limited success. Scientists at Red Lion Chem Tech are testing two new approaches - submersible ballasts containing copper-binding adsorbents, and an industrial pump-and-treat system passing water through test columns. In controlled studies, both methods removed over 94% of copper from water samples from San Diego Bay in a single treatment, with the pump-and-treat system completing treatment in under a minute versus 96 hours for the ballasts. Further field tests of these promising rapid remediation methods could help affected
CL_LOIPOSTERFINAL
This document summarizes loss on ignition (LOI) results from a sediment core collected from Crystal Lake in western Ohio. LOI analysis was conducted on three additional drives from the core to further investigate quasi-cycles in organic material and calcium carbonate levels over time. The results provide evidence of fluctuating organic content between 4-18% over depths of 1200-1550cm. Calcium carbonate levels were highest from 1100-1460cm and decreased below 1460cm, potentially indicating a change in the carbon cycle. Continued LOI and other analyses at this site will improve understanding of past climate changes in the region.
Sc 1000 cefas reg 25334
Gemtek Products PLC is registered to produce drilling mud additives for use in oil and gas operations. The product registration is certified by the Centre for Environment Fisheries and Aquaculture Science and expires on May 3rd, 2016. Test results show the product has low aquatic toxicity and biodegrades within 15.2 days.
Conceptual Site Model Development and Environmental Molecular Diagnostics
This was presented at the 2019 Clemson Hydrogeology Symposium. Its full title is Conceptual Site Model Development and Environmental Molecular Diagnostics Use for PlumeStop(R) Liquid Activated Carbon(TM) Application at a Trichlorofluoromethane Groundwater Plume.
Undergrad defense powerpoint
This document summarizes research assessing the source rock potential of organic-rich shales using solid-state 13C NMR spectroscopy and Rock-Eval pyrolysis. The objectives were to relate the chemical structure of kerogen to its pyrolysis behavior and develop a predictive model for hydrocarbon potential. Samples from the Eagle Ford Shale were analyzed using 13C NMR to quantify functional groups. Rock-Eval pyrolysis provided data on hydrocarbon content and quality. Strong correlations were found between kerogen structure parameters from NMR and pyrolysis yields, supporting the hypothesis that hydrocarbon generation potential is linked to kerogen chemistry.
Stormwater pond ppt (1)
The SAJO Consulting Group was commissioned by Quintin Rochfort of Environment Canada to investigate contaminants in the Rouge River stormwater pond and evaluate its environmental condition. They collected water, sediment, and pore water samples from 4 sites in the pond during fall and spring seasons. Analysis found high concentrations of pollutants like road salts, cyanide, PAHs and phosphorus throughout the pond, especially at site 4. Based on the poor water and sediment quality, high contaminant levels, and unsuitable conditions for aquatic life, the overall pond condition was deemed poor. The report recommended draining the pond and excavating/disposing of contaminated sediment, especially from site 4, to improve conditions.
Leachate project presentation Engineers Ireland Talk
This document examines landfill leachate management practices in Ireland. It finds that while landfill practices have improved, co-treating leachate with municipal wastewater poses challenges. Studies of two WWTPs showed leachate loading regimes were generally appropriate but seasonal variation in leachate volumes risks overloading plants. Nitrogen loading from leachate needs consideration and on-site storage is recommended to minimize risks to WWTP performance.
David diaspora
The document summarizes research on measuring concentrations of trace metals in water samples from the Ialomița and Prut Rivers in Romania. Samples were taken at various points along the rivers and during different seasons. Techniques like ICP-AES and differential pulse anodic stripping voltammetry using a mercury film electrode were used to detect metals like iron, selenium, copper, zinc, lead, cadmium, mercury, and arsenic. The results showed seasonal variations in metal concentrations and bioaccumulation in aquatic organisms.
Sardinia 2015: Impact of municipal solid waste landfill leachate loading on t...
Impact of municipal solid waste landfill leachate loading on the performance of two wastewater treatment plants.
Assingment 01 p1
Summary of paper, Estimation and Distribution of Nitrate Contamination in
Groundwater of Wah Town, its Causes and Management
Newsletter EPA Landfill Leachate Project
Internationally, poor landfill leachate management has caused groundwater and environmental pollution. In Ireland, 95% of landfill leachate is sent to municipal wastewater treatment plants for treatment, but increasingly stringent regulations have increased treatment costs. As landfills can generate leachate for over 30 years after closure, sustainable long-term leachate management is needed. This project aims to characterize Irish landfill leachates and evaluate the impacts and costs of on-site versus off-site leachate treatment to develop management guidelines. Preliminary results found most leachate parameters exceeded levels that can inhibit wastewater treatment.
Optimum GAC Selection for NOM Removal from High TOC Upland Waters
This document discusses selecting the optimal granular activated carbon (GAC) for removing natural organic matter (NOM) from upland waters with high total organic carbon. It aims to link NOM characteristics to GAC physicochemical properties to establish the most effective GAC media. Testing of four commercial GACs with real upland water from two water treatment works found the highest adsorption capacity for NOM varied between sites, with GAC C performing best at one site and GAC A at the other. Further analysis of NOM composition and fractionation is needed to fully characterize performance differences between GAC types.
Rainfall and Chemical Weathering of Basalt Facade at Puebla Cathedral, Mexico
Pollutant emissions from anthropogenic activities have modified frequency, amount and chemical quality of rainfall at a specific site. Interactions of atmospheric dust with rainfall have induced weathering at Puebla Cathedral basalt facade. Chemical damage in exposed construction materials becomes evident as crusts, color bleaching, or salt deposits either into the stone or onto its surface. This work presents data on atmospheric dust (2012), rainfall (2009, 2011, 2012 years) and weathered basalt samples collected at downtown Puebla. Samples were characterized by gravimetric and spectrophotometric techniques for anions and metals. Results have provided evidence that atmospheric dust contains carbonates (>300 mg/g), sulfate and chloride (< 10 mg/g); otherwise main anions in rain samples are bicarbonate>chloride>sulfate, this order is reproduced in the results of most weathered basalt samples.
Chris_Pertsc_Abstract
The document describes the development of an autonomous in-situ total phosphorus analyzer for use in aquatic environments. The analyzer uses the colorimetric stannous chloride-molybdenum blue method to measure orthophosphate, organic phosphate, and assimilated phosphate in algal biomass. A fluorinated ethylene propylene tubing digester catalyzed by UV light and heated by a nickel chromium wire is developed to digest organic phosphorus into a measurable form. Water samples and reagents are delivered using microfluidics and syringes controlled by linear actuators. Absorbance measurements are taken using a photodiode and LED in a flow cell. Validation tests achieved a correlation of r2=0
Water quality testing july 2012
The Nature Foundation tested water quality at 7 sites on St. Maarten in July 2012. Tests measured nitrates, phosphates, nitrogen, dissolved oxygen, pH, and temperature. The Great Salt Pond and Fresh Pond had relatively high levels of nitrates and phosphates, indicating pollution. The Great Salt Pond also had elevated nitrogen levels that could threaten aquatic life. Overall water quality was fair to poor at some sites, suggesting a need for improved wastewater management.
Rq evaluation
This document presents toxicity data for several metal species and chemicals using different species groups. It provides no-observed-effect concentration (NOEC) and lethal concentration 50% (LC50) toxicity values for copper, cadmium, and chlordane using algae, crustaceans, and fish species. It then calculates risk quotients (RQs) by dividing predicted environmental concentrations (PECs) by predicted no-effect concentrations (PNECs), finding that cadmium has the highest RQ and potential risk of the three chemicals analyzed.
Biological Nutrient Removal Applications for Monitoring ORP | YSI
Biological nutrient removal applications for monitoring oxidation reduction potential in wastewater covers four main topics: the science of ORP/Redox, putting ORP to use, applications and sensor care.
What's hot (18)
Kupryianchyk: Understanding bioaccumulation and biotransformation processes o...
Kupryianchyk: Understanding bioaccumulation and biotransformation processes o...
Conceptual Site Model Development and Environmental Molecular Diagnostics
Conceptual Site Model Development and Environmental Molecular Diagnostics
Leachate project presentation Engineers Ireland Talk
Leachate project presentation Engineers Ireland Talk
Sardinia 2015: Impact of municipal solid waste landfill leachate loading on t...
Sardinia 2015: Impact of municipal solid waste landfill leachate loading on t...
Optimum GAC Selection for NOM Removal from High TOC Upland Waters
Optimum GAC Selection for NOM Removal from High TOC Upland Waters
Rainfall and Chemical Weathering of Basalt Facade at Puebla Cathedral, Mexico
Rainfall and Chemical Weathering of Basalt Facade at Puebla Cathedral, Mexico
Biological Nutrient Removal Applications for Monitoring ORP | YSI
Biological Nutrient Removal Applications for Monitoring ORP | YSI
Similar to Potential Contamination of Mercury from Artisanal Gold Mining
Doctorate Dissertation
Ecotoxicity & Risk Assessment of Mercury in the Grand Bay National Estuarine Research Reserve:
Profiling Mercury Distribution in the NERR by Cold Vapor Atomic Absorption Spectrometery
Doctorate dissertation
The document summarizes a dissertation proposal that aims to assess mercury distribution and potential health risks in the Grand Bay National Estuarine Research Reserve. The study will measure mercury levels in fish, water, and sediment samples collected from the reserve using cold vapor atomic absorption spectrometry. The results will help inform policies for managing mercury contamination and assess spatial and temporal trends and risks from mercury exposure.
Article ok
This document describes a new method for extracting trace amounts of mercury from natural waters using silver and gold nanoparticles impregnated in nylon membrane filters. Water samples are treated to convert all mercury species to Hg2+ and then reduced to elemental Hg0. The mercury is then collected on the nanoparticle-coated membrane filters during filtration. Mercury levels are then determined by thermal desorption from the filters using a mercury analyzer. This new method achieves a lower limit of detection of 0.04 ng compared to the traditional cold vapor generation method, and avoids additional sample treatment and contamination risks. Mercury was also found to be stable on the filters for at least 5 months without loss.
2-18 joac print
This document analyzes heavy metal contamination levels in sediments from the Yamuna River in Agra, India. Heavy metal concentrations (of Cr, Cu, Ni, Pb, Zn, Cd, Mn, Co, Fe) were measured at 12 sites along the river. Concentrations of Cr, Cu, Ni, Pb, Zn, Cd were found to be higher than levels from other river basins worldwide and in India. Comparison to effect guidelines showed concentrations above levels that could negatively impact aquatic life. Statistical analysis revealed correlations between certain metal pairs, possibly indicating common sources like urban runoff. Various indices were calculated to assess environmental risk and sediment pollution levels, showing sediments ranging from moderately to dangerously polluted. Anthropogenic
Seminar presentation
The document summarizes a study of mercury pollution in Kodaikkanal Lake in India due to a thermometer factory. Mercury levels were measured in water, sediment, and fish samples from Kodaikkanal Lake and compared to two other nearby lakes. Results found elevated mercury levels in all Kodaikkanal Lake samples, with sediment showing 276-350 mg/kg mercury and fish containing 120-290 mg/kg, even years after the factory closed, indicating mercury persists in the environment.
Isotherm Modeling and Thermodynamic Study of the Adsorption of Toxic Metal by...
Isotherm Modeling and Thermodynamic Study of the Adsorption of Toxic Metal by...CrimsonpublishersEAES
Isotherm Modeling and Thermodynamic Study of the Adsorption of Toxic Metal by the Apricot Stone by Moussa Abbas*, Tounsia Aksil and Mohamed Trari in Environmental Analysis & Ecology Studies
Meulepas, 2009, Effect Of Environmental Conditions On Sulfate Reduction With ...
1) The document describes experiments assessing the potential for using anaerobic oxidation of methane (AOM) coupled to sulfate reduction as an electron donor for biological sulfate reduction in industrial applications.
2) An enrichment of methane-oxidizing sulfate-reducing microorganisms from Eckernforde Bay sediment was used to study the effect of various environmental conditions on the rate of AOM and sulfate reduction.
3) The optimum conditions for AOM and sulfate reduction by the enrichment were a pH of 7.5, salinity of 30‰, and temperature of 20°C. AOM was completely inhibited at sulfide concentrations above 2.4 mM.
Mt lasut 2008-hg-cms
This document summarizes a study on the accumulation of mercury in marine biota in Buyat Bay, Indonesia. The study found mercury in all sampled organisms, with concentrations varying by species and trophic level. Mercury concentrations were lowest in primary producers like seaweed and sea grass, and highest in carnivorous fish like the honeycomb grouper, with levels over 350 parts per billion. The results indicate biomagnification of mercury up the food chain, especially in the form of methylmercury, the most toxic and bioaccumulative form, posing risks to human health.
EVALUATION OF HEAVY METALS IN SEDIMENT OF SOME SELECTED DAMS FROM KATSINA STA...
EVALUATION OF HEAVY METALS IN SEDIMENT OF SOME SELECTED DAMS FROM KATSINA STA...International journal of scientific and technical research in engineering (IJSTRE)
This work contributes to the monitoring of water pollution of some selected Dams in Katsina
State, North western Nigeria by assessing the degree of heavy metal pollution in the Dams sediment samples.
The study was conducted in the year 2017 within some selected Dams in the State (Ajiwa, Zobe,
Sabke/Dannakola) that are beehives of fishing and Agricultural activities in Katsina State. Analysis for the
concentration of these heavy metals; Cr, Cd, Fe, Ni, Mn, Pb and Zn was conducted by the use of AAS (by
Atomic Absorption Spectrophotometry) method. Several indices were used to assess the metal contamination
levels in the sediment samples, namely; Geo-accumulation Index (Igeo), Enrichment Factor (EF),
Contamination Factor (CF), Degree of Contamination (Cd), Pollution Load Index (PLI) and Potential
Ecological Risk Index (PERI). The result of this study has shown that generally among the heavy metals
evaluated, the highest concentration was observed for Fe (range: 2.6718-4.2830 ppm), followed by Zn (range:
0.4265-0.7376 ppm), Cr (range: 0.1106-0.1836 ppm), Cd (range: 0.1333-0.1273 ppm) and Mn (range: 0.1136-
0.1271 ppm). While Pb has the lowest concentration (range: 0.0472-0.0598 ppm). For all the site sampled the
heavy metal Ni was below detection level (BDL). From the results of heavy metals I-geo values, according to
Muller’s classification, all the sediment samples from the selected dams were unpolluted (class 0). The result for
the enrichment factor has shown that for all the selected dam sediment samples the heavy metals show
deficiency to minimal enrichment. Also based on the contamination factors for all sediment samples the heavy
metal Cd has a CF values range of 0.5430-0.6665 (~1), indicating that the sediment samples are moderately
contaminated with Cd. In contrast, the rest of the heavy metals exhibit low contamination in general. The value
of PLI ranges from 0.2408 to 0.4935, indicating unpolluted to moderate pollution. The Eri values for all
samples are all < 40, presenting low ecological risk. The results suggest that the sediment samples from the
selected dams in Katsina state has low contamination by the heavy metals evaluated.10 a study of heavy metal pollution of ghaggar river ravi pareek
1. The study analyzed heavy metal pollution in the Ghaggar River throughout its 466 km stretch in India. Water samples from 16 sites were tested for concentrations of metals including Fe, Hg, As, Pb, Cu, Zn, Cd, Ni, and Cr.
2. The results showed that Fe had the highest concentration among the metals tested, followed by Zn, Ni, Cu, Cd, Cr, Pb, Hg, and As, which was absent from all samples. Some metal concentrations exceeded national drinking water guidelines.
3. Sources of heavy metal pollution included domestic, industrial, and municipal wastewaters discharged into the river along its course. High metal levels could pose health risks to humans and aquatic
H0413437
The document analyzes physicochemical properties and heavy metal concentrations of surface and underground water samples from iron mining areas in Kogi State, Nigeria. Water samples were collected during dry and rainy seasons from 7 locations. Results found pH to be weakly acidic in dry season and weakly alkaline in rainy season. Electrical conductivity, total dissolved solids, alkalinity and hardness fell within recommended limits. Concentrations of heavy metals like lead, cadmium and chromium were higher than guidelines in some samples, indicating pollution from mining activities. Overall, the study assessed water quality in the mining region and found evidence of toxic metal contamination from mining impacts.
Assessment of Mercury Toxicity Hazard - Honda Bay, Palawan
Assessment of Mercurity Toxicity Hazard Associated with Former Cinnabar Mining and Tailings Disposal in Honda Bay, Palawan
T M Williamd, J M Weeks, A Apostol, C Miranda
British Geological Survey
WC/96/31/R
Separation, characterization and leaching behaviors of heavy metals in contam...
The document summarizes a study on the characterization and leaching behaviors of heavy metals in contaminated river sediments. Sequential extraction tests found that heavy metal concentrations exceeded sediment quality standards. Acidic washing and chelation extraction treatments were then tested to remove heavy metals. Acid washing with 2N HCl for 120 minutes achieved the highest removal rates of 70-90% for different heavy metals. Chelation extraction with 0.5M citric acid for 120 minutes removed 36.69% of copper, while 0.5M EDTA for 120 minutes removed 45.83% of lead and 0.5M malic acid for 120 minutes removed 62.1% of zinc. The study concludes that acid washing and chelation agent extraction
ANALYSIS OF HYDROGEOCHEMICAL AND MINERALOGICAL CHARACTERISTICS RELATED TO HEA...
This document analyzes the hydrogeochemical and mineralogical characteristics related to heavy metal attenuation in a stream polluted by acid mine drainage from an underground metal mine. Water and sediment samples were collected from affected and unaffected areas. Chemical analysis showed affected water had low pH, high sulfate concentrations, and high heavy metal levels. Heavy metal concentrations decreased downstream as pH increased. Mineralogical analysis identified iron oxide minerals like schwertmannite and goethite precipitating from acid mine drainage. Sequential extraction showed heavy metals were primarily bound to iron oxide phases farther from the mine, but closer to the mine they were more exchangeable and bound to organic matter. The study concludes acid mine drainage chemistry is controlled by iron mineral transformations and precip
Mercury concentrations in 14 commonly consumed fresh water fish of bangladesh
This study analyzed mercury concentrations in 14 commonly consumed freshwater fish species in Bangladesh. Samples were collected from markets and irradiation and radiochemical separation methods were used to determine mercury levels. Results ranged from 0.20-0.91 μg/g dry weight. Six species had 0.20-0.32 μg/g, seven had 0.30-0.50 μg/g, and one had 0.80-0.91 μg/g. The total average was 0.377 μg/g. Mercury levels were found to be within international safety limits and did not pose health risks to Bangladeshi consumers based on estimated dietary intake. The highest levels were found in the catfish Clarias gariepinus
An Assignment On Biotechnological Methods In Pollution Abatement
This document discusses biotechnological methods for pollution abatement. It summarizes research using biological markers like fish to monitor metal pollution in various bodies of water. It also describes the mechanisms and factors involved in enhanced biological phosphorus removal (EBPR) wastewater treatment processes. EBPR relies on selecting microbes that uptake phosphates beyond their needs. It uses alternating anaerobic and aerobic zones to encourage phosphorus-accumulating organisms that store phosphates for removal. Key factors for EBPR include sludge age, volatile fatty acids as an energy source, and maintaining sufficient BOD or COD levels relative to phosphorus.
Hg analysis from the fish and their effect on human life by using Cold Vapor ...
Mercury is one of the most toxic heavy metal found on earth it causes many decease, the main cause of mercury pollution is the mining industry and industrial effluent.
ANALYSIS OF WATER OF RAIGARH AREA WITH SPECIAL REFERENCE TO HEAVY METALS
ANALYSIS OF WATER OF RAIGARH AREA WITH SPECIAL REFERENCE TO HEAVY METALSInternational Journal of Technical Research & Application
The quality of any body of surface or ground water
is a function of either both natural influences and human
influences. Without human influences water quality would be
determined by the weathering of bedrock minerals, by the
atmospheric processes of evaporation, transpiration and the
deposition of dust and salt by wind, by the natural leaching of
organic matter and nutrients from soil, by hydrological factors
that lead to runoff, and by biological processes within the aquatic
environment that can alter the physical and chemical
composition of water. Declining water quality has become a
global issue of concern as human populations griesrow, industrial
and agricultural activities expand, and climate change threatens
to cause major alterations to the hydrological cycle.ppppppppppppppppppppppppppppppppppppppppppppppppppt
1) The document outlines a study that investigated using banana and tangerine peels to remove heavy metals like arsenic, mercury, lead, and manganese from wastewater through biosorption.
2) Experiments found that tangerine peels performed better than banana peels at removing metals, achieving removal rates of 94.34-100% for different metals compared to 64.52-99.08% for banana peels.
3) The maximum biosorption capacities measured were 233.5 mg/g for arsenic removal using tangerine peels and 252 mg/g for lead removal also using tangerine peels.
E0262027035
This document summarizes an experimental study on the use of unmodified lignocellulosic fibrous layer of palm tree trunk (ULFPT) as a low-cost biosorbent for removing copper (Cu2+) and zinc (Zn2+) from aqueous solutions. Batch experiments were conducted to investigate the effects of pH, initial metal ion concentration, and contact time on biosorption. Equilibrium isotherm data were fitted to Langmuir, Freundlich, Redlich-Peterson, and Temkin models to understand adsorption mechanisms. The Redlich-Peterson model provided the best fit for Cu2+ and Zn2+ biosorption. The Langmuir model also fitted the experimental data well.
Similar to Potential Contamination of Mercury from Artisanal Gold Mining (20)
Isotherm Modeling and Thermodynamic Study of the Adsorption of Toxic Metal by...
Isotherm Modeling and Thermodynamic Study of the Adsorption of Toxic Metal by...
Meulepas, 2009, Effect Of Environmental Conditions On Sulfate Reduction With ...
Meulepas, 2009, Effect Of Environmental Conditions On Sulfate Reduction With ...
EVALUATION OF HEAVY METALS IN SEDIMENT OF SOME SELECTED DAMS FROM KATSINA STA...
EVALUATION OF HEAVY METALS IN SEDIMENT OF SOME SELECTED DAMS FROM KATSINA STA...
10 a study of heavy metal pollution of ghaggar river ravi pareek
10 a study of heavy metal pollution of ghaggar river ravi pareek
Assessment of Mercury Toxicity Hazard - Honda Bay, Palawan
Assessment of Mercury Toxicity Hazard - Honda Bay, Palawan
Separation, characterization and leaching behaviors of heavy metals in contam...
Separation, characterization and leaching behaviors of heavy metals in contam...
ANALYSIS OF HYDROGEOCHEMICAL AND MINERALOGICAL CHARACTERISTICS RELATED TO HEA...
ANALYSIS OF HYDROGEOCHEMICAL AND MINERALOGICAL CHARACTERISTICS RELATED TO HEA...
Mercury concentrations in 14 commonly consumed fresh water fish of bangladesh
Mercury concentrations in 14 commonly consumed fresh water fish of bangladesh
An Assignment On Biotechnological Methods In Pollution Abatement
An Assignment On Biotechnological Methods In Pollution Abatement
Hg analysis from the fish and their effect on human life by using Cold Vapor ...
Hg analysis from the fish and their effect on human life by using Cold Vapor ...
ANALYSIS OF WATER OF RAIGARH AREA WITH SPECIAL REFERENCE TO HEAVY METALS
ANALYSIS OF WATER OF RAIGARH AREA WITH SPECIAL REFERENCE TO HEAVY METALS
ppppppppppppppppppppppppppppppppppppppppppppppppppt
ppppppppppppppppppppppppppppppppppppppppppppppppppt
More from Markus T Lasut
Mt lasut 2007-dissertation-ait-th
This document summarizes a dissertation submitted by Markus Talintukan Lasut for the degree of Doctor of Technical Science in Aquaculture and Aquatic Resources Management at the Asian Institute of Technology. The dissertation focuses on analyzing the current wastewater management system and constraints/potentials for wastewater management in the coastal city of Manado, North Sulawesi, Indonesia. Key aspects studied include the community's environmental knowledge and attitudes, condition of household wastewater treatment systems, and water quality of selected rivers. The results identified constraints such as natural conditions, population growth, low-income households, and poor wastewater infrastructure. Potentials included environmental awareness and existing policies. The dissertation concludes by recommending strategic
Mt lasut 2002-ngo-ekoton
The document summarizes the participation of non-governmental organizations (NGOs) in managing coastal communities in North Sulawesi, Indonesia. NGOs play a key role in facilitating bottom-up coastal zone management by working with local communities and governments. Their activities include establishing community information centers, improving fishermen's incomes, developing environmental education programs in schools, and conducting coastal conservation projects like mangrove replanting and coral reef cleaning. As a result of NGO participation, local villages have established regulations to better manage coastal resources in a sustainable manner.
Mt lasut 2009-hg-jms
Studi ini meneliti proses bioakumulasi dan biotransfer merkuri (Hg) pada rantai makanan organisme perairan, yaitu fitoplankton, ikan herbivora, dan ikan karnivora dalam kondisi terkontrol. Hasilnya menunjukkan terjadinya akumulasi Hg yang bergantung pada konsentrasi yang diberikan, dengan biotransfer tertinggi antara fitoplankton dan ikan herbivora."
Mt lasut 2005-ww-cms
This study assessed water quality in three rivers flowing into Manado Bay in Indonesia. Water samples were collected from stations along each river during dry and wet seasons and analyzed for biochemical oxygen demand (BOD), nutrients, bacteria, total mercury, and other pollutants. The results showed pollution from urban wastewater and agricultural runoff, with high levels of bacteria and organic waste. This poor water quality threatens Manado Bay and local fisheries and tourism. Improved wastewater management is needed to mitigate pollution in the rivers and bay.
Mt lasut 1999-oil-littoraria-pmbc
The attachment force of the snail Littoraria scabra was measured when exposed to water-soluble fractions (WSF) of lubricant oil at different concentrations and durations. Higher concentrations and longer exposures reduced the snail's ability to attach to surfaces. This was likely due to increased mucus production draining the snail's energy reserves. Statistical analysis found the WSF significantly reduced attachment force and endurance at concentrations of 0.8 ppm or more after 4 hours of exposure.
Mt lasut 1999-cyanide-haliotis-pmbc
This study examined the effects of salinity and cyanide (KCN and NaCN) interactions on mortality of abalone (Haliotis uaria). The highest mortality occurred at a salinity of 25% and cyanide concentrations of 4 ppm for both KCN and NaCN. KCN was found to be more toxic than NaCN. A salinity of 25% is lower than the abalone's optimum and likely caused stress, increasing their sensitivity to cyanide. Cyanide inhibits oxidative phosphorylation in cells, preventing oxygen utilization and rapid cessation of metabolic processes. This leads to mortality.
Mt lasut 1998-polinices-pmbc
The document describes 4 species of the genus Polinices collected from northern Sulawesi, Indonesia:
1) P. (Mammilla) melanostoma, characterized by a whitish shell with diffuse brown zones and spots;
2) P. (M.) sebae, distinguished by a ear-shaped shell with well-defined brown spots and streaks;
3) P. (Polinices) flemingianus, identified by its globular shell with a closed umbilicus; and
4) P. (P.) tumidus, recognized by its ovate shell with an open umbilicus. The species are described and illustrated with measurements and keys provided
Mt lasut 1998-diazinon-septifer-pmbc
This document summarizes a study that examined the effect of two pesticides, diazinon and glyphosate, on the oxygen consumption of the box mussel Septifer bilocularis. Mussels were exposed to various sublethal concentrations of each pesticide and their oxygen consumption was monitored over time. Results showed that low concentrations tended to increase oxygen consumption, while higher concentrations decreased it. Specifically, concentrations of 6 and 30 ppm diazinon and 720 and 960 ppm glyphosate were found to have a statistically significant effect on reducing the mussels' oxygen consumption. The study provides insight into how these common pesticides may impact the physiology and energy requirements of non-target marine organisms.
Mt lasut 1996-tesis-aarhus univ-dk
This thesis examines the toxic effects of ethyl parathion and polluted seawater on the polychaete worm Ophryotrocha diadema. Short and long term experiments were conducted to study lethal and sublethal impacts on mortality, growth, and reproduction. The larval development of O. diadema was also described. Results showed larvae were more susceptible than adults to ethyl parathion. Growth was significantly reduced at concentrations of 0.9 ug/L. The thesis also discovered the egg-eating behavior of O. diadema, which may influence interpretation of previous toxicity tests using this species.
Prospect on pelagic fisheries in northern Sulawesi, Indonesia
Proceedings of the Twelfth Biennial Conference of the International Institute of Fisheries Economics & Trade (IIFET). November 2004.
Arsenik; Limbah Tambang Berbahaya
Tulisan ini membahas tentang bahaya limbah tambang arsenik yang dapat menyebabkan pencemaran lingkungan. Arsenik berasal dari bebatuan yang mengandung deposit emas dan dapat menyebabkan berbagai penyakit seperti kanker. Kegiatan penambangan emas skala besar berisiko meningkatkan konsentrasi arsenik di lingkungan karena membuka akses ke bebatuan yang mengandung arsenik. Proses pengolahan bijih emas primer yang mengandung senyawa ar
Accumualtion of TBT and Intersex Occurence on Marine Snails Littoraria Scabra
Presented in the International Conference & Workshop XI of “Tropical Marine Mollusc Programme”, sponsored by DANIDA at Kodaikal, Rameswaran and Tuticorin-Tamilnadu, India. 28 September – 8 Oktober, 2000.
More from Markus T Lasut (20)
Meningkatkan Keuntungan Tanpa Merusak Komitmen “Kolaborasi” di Bunaken
Meningkatkan Keuntungan Tanpa Merusak Komitmen “Kolaborasi” di Bunaken
Strategi Pengelolaan Lingkungan Hidup di Kota Tomohon Menuju Pembangunan Yang...
Strategi Pengelolaan Lingkungan Hidup di Kota Tomohon Menuju Pembangunan Yang...
Prospect on pelagic fisheries in northern Sulawesi, Indonesia
Prospect on pelagic fisheries in northern Sulawesi, Indonesia
Dampak Kegiatan Pertambangan terhadap Wilayah Pesisir dan Laut
Dampak Kegiatan Pertambangan terhadap Wilayah Pesisir dan Laut
Accumualtion of TBT and Intersex Occurence on Marine Snails Littoraria Scabra
Accumualtion of TBT and Intersex Occurence on Marine Snails Littoraria Scabra
Recently uploaded
What is Digital Literacy? A guest blog from Andy McLaughlin, University of Ab...
What is Digital Literacy? A guest blog from Andy McLaughlin, University of Aberdeen
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...Nguyen Thanh Tu Collection
https://app.box.com/s/tacvl9ekroe9hqupdnjruiypvm9rdaneHow to deliver Powerpoint Presentations.pptx
"How to make and deliver dynamic presentations by making it more interactive to captivate your audience attention"
A Visual Guide to 1 Samuel | A Tale of Two Hearts
These slides walk through the story of 1 Samuel. Samuel is the last judge of Israel. The people reject God and want a king. Saul is anointed as the first king, but he is not a good king. David, the shepherd boy is anointed and Saul is envious of him. David shows honor while Saul continues to self destruct.
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
Andreas Schleicher, Director of Education and Skills at the OECD presents at the launch of PISA 2022 Volume III - Creative Minds, Creative Schools on 18 June 2024.
Temple of Asclepius in Thrace. Excavation results
The temple and the sanctuary around were dedicated to Asklepios Zmidrenus. This name has been known since 1875 when an inscription dedicated to him was discovered in Rome. The inscription is dated in 227 AD and was left by soldiers originating from the city of Philippopolis (modern Plovdiv).
Gender and Mental Health - Counselling and Family Therapy Applications and In...
A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
Educational Technology in the Health Sciences
Plenary presentation at the NTTC Inter-university Workshop, 18 June 2024, Manila Prince Hotel.
Bossa N’ Roll Records by Ismael Vazquez.
Bossa N Roll Records presentation by Izzy Vazquez for Music Retail and Distribution class at Full Sail University
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...Nguyen Thanh Tu Collection
https://app.box.com/s/qhtvq32h4ybf9t49ku85x0n3xl4jhr15Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh - RAYH...
Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
Physical pharmaceutics notes for B.pharm students
Recently uploaded (20)
What is Digital Literacy? A guest blog from Andy McLaughlin, University of Ab...
What is Digital Literacy? A guest blog from Andy McLaughlin, University of Ab...
SWOT analysis in the project Keeping the Memory @live.pptx
SWOT analysis in the project Keeping the Memory @live.pptx
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh - RAYH...
Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh - RAYH...
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
Potential Contamination of Mercury from Artisanal Gold Mining
- 1. Potential Contamination of Mercury from Artisanal Gold Mining in the Talawaan Watershed Area, North Sulawesi, Indonesia Markus T. Lasut Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado, North Sulawesi, Indonesia Yoshiaki Yasuda Natural Sciences Section, National Institute for Minamata Disease, Minamata City, Kumamoto, Japan
- 3. STUDY AREA (C): Talawaan Watershed Area (D): Gold Mining Activities, Human Activities, Natural Resources
- 4. STUDY AREA Talawaan Watershed Area C Talawaan River Kima River Bailang River Mining Area
- 7. Hypothesis – Hg contamination
- 8. RESULT 1: Distribution of THg (ppb) in the Sediments (Control: 5.8 ppb) Talawaan River Kima River Bailang River 2357 13
- 9. RESULT 2 : Distribution of MeHg (ppb) in the Sediments (Control: 0.22 ppb) Talawaan River Kima River Bailang River 2.64 0.36
- 10. RESULT 3 : MeHg (ppb) in Fish (meat) Control: Psenopsis : 5.9 ppb (3) ; Epineplelus merra : 41 ppb (2) Blue: Omnivorous Red: Carnivorous 363 30
- 11. RESULT 4 : MeHg (ppm) in Scalp Hairs
- 12. Existing Situation Bioaccumulation process Hg o Hg +2 MeHg Discharging from the gold mining Found in sediment samples THg MeHg Found in fish samples Found in hairs samples MeHg