Microplastics are small plastic fragments less than 5 mm that enter the oceans from various sources and have harmful effects. They are ingested by marine organisms and accumulate up the food chain. Sources include microbeads in cosmetics, plastic waste breakdown, and industrial activities. Effects include the absorption of chemicals and transfer to higher trophic levels. Control measures involve banning microbeads, improving waste management, and developing biodegradable and recycling alternatives to reduce plastic pollution in the oceans.
Trophic Transfer of Microplastics and Mixed Contaminants in the Marine Food W...Mohammad Rashidul Islam
Introduction
What is microplastic and how it formed?
Fate of microplastics
Factor influencing microplastics ingestions.
How microplastics and mixed contaminants
transfer trophically in marine food web?
Main effect of microplastics in trophic transfer.
Implications of human health
Conclusion and recommendations.
This document summarizes research on microplastics in the aquatic environment and their impacts. It defines microplastics as plastic particles less than 5mm in size that originate from both commercial products and breakdown of larger plastics. Microplastics are persistent pollutants that can be ingested by marine organisms and enter the human food chain. Common sources include textiles, wastewater treatment plants, and plastic products. Microplastics exposure poses health risks to organisms like oxidative stress, reduced feeding, and transporting chemical contaminants up the food chain. While global action is needed, individual choices around plastic use can help address this growing environmental problem.
Microplastics are plastic particles less than 5mm in size that originate from the breakdown of larger plastic debris or as manufactured microbeads. They are a persistent pollutant that enters waterways and oceans, where it is ingested by various aquatic species and makes its way up the food chain. Microplastics exposure poses risks to wildlife, ecosystems, and potentially human health through the absorption of toxic chemicals. While some regulations exist or are being implemented to ban microbeads in cosmetics, widespread microplastic pollution remains an urgent global environmental problem.
This document summarizes the issue of plastic pollution in Indonesian marine environments. It discusses how plastics enter the environment as both primary and secondary microplastics. Microplastics are then ingested by marine animals and can accumulate toxins in tissue, posing risks to animal and human health. The document also reviews several studies that found microplastics in various Indonesian coastal and marine areas, demonstrating it is a widespread problem. Effective solutions are needed to address plastic pollution for the health of Indonesia's marine ecosystems and communities.
This document discusses the impacts of microplastics pollution in the marine environment. It begins by explaining that microplastics come from the breakdown of larger plastic debris and are small plastic particles less than 5mm in size. Microplastics enter the oceans from various sources like land runoff, coastal tourism, and shipping. They are widely distributed in surface waters, beaches, and ocean sediments. Microplastics can harm marine life like plankton, fish, and turtles by causing problems with feeding, growth, and behavior when ingested. They can also bioaccumulate up the food chain and potentially impact human health. The document examines in more detail the toxic effects of microplastics on different fish species.
Microplastics, small pieces of plastic, less than 5 mm (0.2 inches) in length, that occur in the environment as a consequence of plastic pollution. Microplastics are present in a variety of products, from cosmetics to synthetic clothing to plastic bags and bottles. Many of these products readily enter the environment in wastes.
Lecture module on Microplastic Pollution (Microplastic, its types, classification, sources, degradation (biotic & abiotic), distribution and fate of microplastics in terrestrial, marine, freshwater, snow environment and atmosphere; Sampling of Microplastic and Quantification and identification of microplastics - FTIR and Raman spectroscopy
Trophic Transfer of Microplastics and Mixed Contaminants in the Marine Food W...Mohammad Rashidul Islam
Introduction
What is microplastic and how it formed?
Fate of microplastics
Factor influencing microplastics ingestions.
How microplastics and mixed contaminants
transfer trophically in marine food web?
Main effect of microplastics in trophic transfer.
Implications of human health
Conclusion and recommendations.
This document summarizes research on microplastics in the aquatic environment and their impacts. It defines microplastics as plastic particles less than 5mm in size that originate from both commercial products and breakdown of larger plastics. Microplastics are persistent pollutants that can be ingested by marine organisms and enter the human food chain. Common sources include textiles, wastewater treatment plants, and plastic products. Microplastics exposure poses health risks to organisms like oxidative stress, reduced feeding, and transporting chemical contaminants up the food chain. While global action is needed, individual choices around plastic use can help address this growing environmental problem.
Microplastics are plastic particles less than 5mm in size that originate from the breakdown of larger plastic debris or as manufactured microbeads. They are a persistent pollutant that enters waterways and oceans, where it is ingested by various aquatic species and makes its way up the food chain. Microplastics exposure poses risks to wildlife, ecosystems, and potentially human health through the absorption of toxic chemicals. While some regulations exist or are being implemented to ban microbeads in cosmetics, widespread microplastic pollution remains an urgent global environmental problem.
This document summarizes the issue of plastic pollution in Indonesian marine environments. It discusses how plastics enter the environment as both primary and secondary microplastics. Microplastics are then ingested by marine animals and can accumulate toxins in tissue, posing risks to animal and human health. The document also reviews several studies that found microplastics in various Indonesian coastal and marine areas, demonstrating it is a widespread problem. Effective solutions are needed to address plastic pollution for the health of Indonesia's marine ecosystems and communities.
This document discusses the impacts of microplastics pollution in the marine environment. It begins by explaining that microplastics come from the breakdown of larger plastic debris and are small plastic particles less than 5mm in size. Microplastics enter the oceans from various sources like land runoff, coastal tourism, and shipping. They are widely distributed in surface waters, beaches, and ocean sediments. Microplastics can harm marine life like plankton, fish, and turtles by causing problems with feeding, growth, and behavior when ingested. They can also bioaccumulate up the food chain and potentially impact human health. The document examines in more detail the toxic effects of microplastics on different fish species.
Microplastics, small pieces of plastic, less than 5 mm (0.2 inches) in length, that occur in the environment as a consequence of plastic pollution. Microplastics are present in a variety of products, from cosmetics to synthetic clothing to plastic bags and bottles. Many of these products readily enter the environment in wastes.
Lecture module on Microplastic Pollution (Microplastic, its types, classification, sources, degradation (biotic & abiotic), distribution and fate of microplastics in terrestrial, marine, freshwater, snow environment and atmosphere; Sampling of Microplastic and Quantification and identification of microplastics - FTIR and Raman spectroscopy
The document discusses plastic pollution and recycling. It notes that plastic production has greatly increased globally but plastic is very slow to decompose, with some plastics taking over 1000 years. This causes plastic pollution in oceans, where it kills and endangers wildlife through entanglement and ingestion. The document advocates for more sustainable plastic recycling approaches to address this growing environmental problem.
Microplastics are a growing threat to ocean health and the food chain. Plastic debris kills thousands of marine animals each year through ingestion or entanglement. Plastic bottles are a major contributor as they take over 450 years to break down into microplastics, harming marine life. Solutions include reducing single-use plastics through deposit return programs, opting for reusable bags, recycling, and properly disposing of trash. Individual actions combined with community efforts are needed to address the massive amounts of plastic pollution entering oceans each year and its impacts on ecosystems and human health.
Microplastics pose threats to fisheries and aquaculture through their accumulation in seafood. Microplastics are tiny plastic particles that are ubiquitous in aquatic environments and absorb toxic chemicals. The plastics and chemicals can transfer through food chains and potentially impact human health upon seafood consumption. The fisheries and aquaculture industries contribute greatly to microplastic pollution through their use of plastics and loss of fishing gear. More research is needed to understand microplastic occurrence, exposure risks, and develop solutions to combat this issue affecting the sustainability of fisheries and food safety.
The global production of plastics is increasing, and that increase is accompanied by an increase in plastic waste.
Part of this waste makes its way into the marine environment in the form of micro-plastics, small particles of plastic that can either be produced as plastic pellets, or result from the degradation of plastic objects such as bags, clothes, household items as well as building materials and fishing and aquaculture gear that has been discarded or lost.
What do we know about the extent of this problem?
presentation was provided by Prof W.U Chandrasekara
Department of Zoology and Environmental Management
For Coastal and Marine resource management course
This document discusses plastic pollution and plastic waste management. It notes that plastic production has increased dramatically since 1950 and now stands at over 300 million metric tons annually. The major issues discussed are health impacts, toxicity of chemicals used in plastic production, lack of biodegradability, and challenges with disposal and waste management. Solutions proposed include segregating plastic waste at the source, conventional recycling into new products, using waste plastic to produce fuel, and incorporating plastic waste into road construction materials. The document emphasizes the importance of individual responsibility and awareness in plastic waste management.
Biological magnification refers to the increasing concentration of a substance like a toxic chemical in successive trophic levels of a food chain. It occurs when organisms at the bottom of the food chain absorb pollutants at higher concentrations than their surroundings. This process can lead to biomagnification where organisms at higher trophic levels face increasing toxic effects as concentrations rise. Examples include the buildup of mercury in large predatory fish and birds of prey after mercury is absorbed by plankton and moves up the food chain. Controlling pollution inputs and improving waste management can help reduce biological magnification and its harmful impacts on ecosystems.
Project on Plastic pollution in which includes:
* Introduction to Plastic and its History
* Types, Uses and Disadvantages of Plastic
* Introduction to Pollution and Plastic Pollution
* Causes, Effects and Facts about Plastic Pollution
* And Some Case studies
* Some Ways to reduce Plastic Pollution
Marine pollution poses a serious threat to ocean life and habitats. Plastic waste in particular is a major problem, with an estimated 100 million metric tons of plastic in oceans. Microplastics less than 5mm in size enter the food chain and can be ingested by marine life, causing harm. Pollution degrades vital habitats like coral reefs, disrupting ecological balance. Solutions include reducing single-use plastic and improving waste management and recycling.
Plankton are small organisms that drift or float in aquatic environments such as oceans, seas and bodies of fresh water. They play an important role in aquatic food webs as primary producers (phytoplankton) or primary consumers (zooplankton). Phytoplankton include algae like diatoms, dinoflagellates and cyanobacteria which produce oxygen and serve as the base of the food chain. Zooplankton include protozoa, rotifers, crustaceans and copepods which feed on phytoplankton and bacteria and are food for larger organisms. Plankton are crucial for marine ecosystems as they provide the base of the food web that supports many fish
This document discusses marine pollution and how IoT technologies can help address it. It begins by introducing the problem of marine pollution and how human activities like waste disposal have negatively impacted ocean life and the environment. It then proposes an IoT system called "SmartComputingSensor" that would use sensors and intelligent computing tools to monitor microplastics in oceans. The rest of the document discusses the impacts of marine pollution on ocean life like fish, seabirds, marine mammals, and sea turtles. It also describes how microplastics can affect marine habitats.
STUDY ON MICROPLASTIC CHALLENGE – INDIAN STATUS AND SOLUTIONS Srinjoy Chatterjee
1. Microplastic (MPs) now has emerged as an alarming environmental pollutant and its prevalence is now widely observed in various ecosystems.
2. The term “microplastic” coined by Thompson et al in the year 2004 basically represents heterogeneous mixture of smaller plastic fragments in the size range of 0.001-5 mm.
3. They may originate either directly (primary sources) through engineered particles such as microbeads/microfibers widely used in Personal Care Products or through fragmentation of larger plastic particles as a result of various anthropogenic activities (secondary sources).
Examples - Fragments of fishing gear, packages and drink bottles, synthetic textiles, car tyres, paints, and cosmetics. Natural breakdown through UV rays of sunlight, microbial processes, or through thermal oxidative processes also account for fragmentation of large plastic particles into MPs.
4. MPs basically consists of six major types of plastic products namely, Polyethylene (PE), Polypropylene (PP), Polyamide (PA), Polyvinyl Chloride (PVC), Polystyrene (PS), Polyurethane (PUR), and Polyethylene Terephthalate (PET).
.
.
.
WHAT ARE THE SOLUTIONS TO THIS MENACE?
1. SOLUTIONS BY REGULATORS, SCIENTISTS, GOVERNMENT AND MANUFACTURING INDUSTRIES.
Microplastics are tiny and may not be easily noticed as a treat to both sea and human life, therefore there is an urgent need to combat it. The potential risk to food security, and thereby human health, has led:
• regulators to call for better understanding education and public awareness of the fate and effects of microplastic debris on marine life.
• to the call for urgent actions by scientists (researching more) government (putting right policies in place) and the manufacturing industries on the need for the reduction of the production and activities resulting in the availability and spread of microplastic into the marine environment.
• To the need to strengthen international and regional cooperation in this area among: decision-makers researchers and academias to raise awareness in addressing water-related issues.
2. PUTTING IN PLACE APPRORIATE PROHIBITIONS, LAWS AND BANS.
The following should be done:
• For Countries: Prohibiting or disincentivizing land-based materials causing marine litter such as the use of microbead plastics for toothpaste.
• For Manufacturing: National law and sub-national law should be put in place.
• At Retail Level: National Law and sub-national law should be put in place.
3. MEASURES TO DO AS AN INDIVIDUAL.
• Report plastics pollutions e.g by using hashtag #plasticspollution with the photo, date and location.
• Cut down on plastics by staying clear of plastic products. Look for natural alternatives or reuseable containers. Don’t buy cleansers and cosmetics with microbeads.
• Clean-up plastic pollution. When possible use a pool or aquarium skimmer to remove plastics debris from the water and throw the debris in the garbage.
World Environment Day 2018's theme is "Beat Plastic Pollution". Plastic is ubiquitous and has benefits like being lightweight and inexpensive but causes major pollution problems. India generates a large amount of plastic waste and it affects many species like birds, fish, turtles and coral reefs by ingestion, entanglement, or blocking sunlight. Plastic pollution also transfers toxic chemicals into the food chain and human health. Individual actions like refusing single-use plastics and encouraging alternatives can help reduce plastic pollution.
This is a presentation which has ideal details of content related to plastics and its effects.It contains information edited from wikipedia and other sources. Hope its useful for learning kids.
Plastic pollution poses serious threats to both the environment and human health. Plastic waste accumulates in land and water bodies around the world, harming wildlife through entanglement and ingestion. Animals often mistake plastic for food due to its small size, which can cause starvation. Chemicals used in plastics' production and additives that leach out are linked to health issues like cancers and developmental problems in humans. Urgent action is needed to promote safer plastic alternatives and responsible waste disposal to mitigate these potential hazards.
This presentation discusses the growing issue of plastic pollution and its effects on the environment. It notes that human civilization has progressed through Stone, Bronze, and Iron Ages, and are now in the Plastic Age. Plastic is widely used for various domestic, medical, agricultural, and industrial purposes. However, plastic waste pollutes the lithosphere, hydrosphere, and atmosphere. Microplastics in particular enter the oceans and aquatic food chains, threatening biodiversity. Burning plastic releases toxic gases that pollute air and contribute to climate change. Potential solutions discussed include banning certain plastics, promoting bioplastics and alternative materials, and developing plastic-degrading enzymes.
This document discusses plastic pollution, its causes, effects, and ways to control it. It provides statistics on plastic production and waste. India generates over 9,000 tons of plastic waste per day, with Delhi being the highest plastic waste generator. The causes of plastic pollution include population growth, excessive plastic use, improper waste disposal, single-use plastics, and the shipping industry. Effects are on health, land, air, soil/groundwater, and marine life. Control measures proposed are reducing plastic use, proper disposal, recycling, and government bans on single-use plastics.
This document discusses the harms of plastic pollution and the plastic epidemic. It notes that plastic production has rapidly increased from 1.5 million tons in 1950 to over 320 million tons today, and is projected to double by 2034. Plastics contain chemicals like BPA and phthalates that disrupt human endocrine systems and are linked to issues like infertility, obesity, and cancer. Microplastics from degraded plastic are ubiquitous in water, food, and air. The document outlines various efforts underway to mitigate plastic pollution through ocean cleanup, bans on microbeads, development of biodegradable plastics, and reducing personal plastic use.
Kukor lect 1_What is enviro toxicol.pptFazilatShahid
Environmental toxicology is the study of the impacts of pollutants on ecosystems. It examines the effects of man-made chemicals on the environment, including their fate and transport within ecosystems and their toxic impacts on organisms, populations, communities, and ecosystem structure and function. Key figures in the development of the field include Rachel Carson, whose book Silent Spring raised awareness of indiscriminate pesticide use and helped drive legislation regulating chemical use and pollution. Environmental toxicology employs laboratory and field studies, as well as modeling, to understand how chemicals interact with ecosystems from the molecular to population level.
The Government of Pakistan has ratified major global conventions on climate change and developed a Framework for Implementation of the Climate Change Policy from 2014-2030 that lists short, medium, and long-term adaptation and mitigation actions. Pakistan also developed a National Policy on Climate Change and National Disaster Risk Reduction Policy in 2012 to mainstream climate change into vulnerable economic and social sectors. Initiatives promote rainwater harvesting and storage while the National Water Policy and Indus Water Treaty govern water sharing and management in the country.
The document discusses plastic pollution and recycling. It notes that plastic production has greatly increased globally but plastic is very slow to decompose, with some plastics taking over 1000 years. This causes plastic pollution in oceans, where it kills and endangers wildlife through entanglement and ingestion. The document advocates for more sustainable plastic recycling approaches to address this growing environmental problem.
Microplastics are a growing threat to ocean health and the food chain. Plastic debris kills thousands of marine animals each year through ingestion or entanglement. Plastic bottles are a major contributor as they take over 450 years to break down into microplastics, harming marine life. Solutions include reducing single-use plastics through deposit return programs, opting for reusable bags, recycling, and properly disposing of trash. Individual actions combined with community efforts are needed to address the massive amounts of plastic pollution entering oceans each year and its impacts on ecosystems and human health.
Microplastics pose threats to fisheries and aquaculture through their accumulation in seafood. Microplastics are tiny plastic particles that are ubiquitous in aquatic environments and absorb toxic chemicals. The plastics and chemicals can transfer through food chains and potentially impact human health upon seafood consumption. The fisheries and aquaculture industries contribute greatly to microplastic pollution through their use of plastics and loss of fishing gear. More research is needed to understand microplastic occurrence, exposure risks, and develop solutions to combat this issue affecting the sustainability of fisheries and food safety.
The global production of plastics is increasing, and that increase is accompanied by an increase in plastic waste.
Part of this waste makes its way into the marine environment in the form of micro-plastics, small particles of plastic that can either be produced as plastic pellets, or result from the degradation of plastic objects such as bags, clothes, household items as well as building materials and fishing and aquaculture gear that has been discarded or lost.
What do we know about the extent of this problem?
presentation was provided by Prof W.U Chandrasekara
Department of Zoology and Environmental Management
For Coastal and Marine resource management course
This document discusses plastic pollution and plastic waste management. It notes that plastic production has increased dramatically since 1950 and now stands at over 300 million metric tons annually. The major issues discussed are health impacts, toxicity of chemicals used in plastic production, lack of biodegradability, and challenges with disposal and waste management. Solutions proposed include segregating plastic waste at the source, conventional recycling into new products, using waste plastic to produce fuel, and incorporating plastic waste into road construction materials. The document emphasizes the importance of individual responsibility and awareness in plastic waste management.
Biological magnification refers to the increasing concentration of a substance like a toxic chemical in successive trophic levels of a food chain. It occurs when organisms at the bottom of the food chain absorb pollutants at higher concentrations than their surroundings. This process can lead to biomagnification where organisms at higher trophic levels face increasing toxic effects as concentrations rise. Examples include the buildup of mercury in large predatory fish and birds of prey after mercury is absorbed by plankton and moves up the food chain. Controlling pollution inputs and improving waste management can help reduce biological magnification and its harmful impacts on ecosystems.
Project on Plastic pollution in which includes:
* Introduction to Plastic and its History
* Types, Uses and Disadvantages of Plastic
* Introduction to Pollution and Plastic Pollution
* Causes, Effects and Facts about Plastic Pollution
* And Some Case studies
* Some Ways to reduce Plastic Pollution
Marine pollution poses a serious threat to ocean life and habitats. Plastic waste in particular is a major problem, with an estimated 100 million metric tons of plastic in oceans. Microplastics less than 5mm in size enter the food chain and can be ingested by marine life, causing harm. Pollution degrades vital habitats like coral reefs, disrupting ecological balance. Solutions include reducing single-use plastic and improving waste management and recycling.
Plankton are small organisms that drift or float in aquatic environments such as oceans, seas and bodies of fresh water. They play an important role in aquatic food webs as primary producers (phytoplankton) or primary consumers (zooplankton). Phytoplankton include algae like diatoms, dinoflagellates and cyanobacteria which produce oxygen and serve as the base of the food chain. Zooplankton include protozoa, rotifers, crustaceans and copepods which feed on phytoplankton and bacteria and are food for larger organisms. Plankton are crucial for marine ecosystems as they provide the base of the food web that supports many fish
This document discusses marine pollution and how IoT technologies can help address it. It begins by introducing the problem of marine pollution and how human activities like waste disposal have negatively impacted ocean life and the environment. It then proposes an IoT system called "SmartComputingSensor" that would use sensors and intelligent computing tools to monitor microplastics in oceans. The rest of the document discusses the impacts of marine pollution on ocean life like fish, seabirds, marine mammals, and sea turtles. It also describes how microplastics can affect marine habitats.
STUDY ON MICROPLASTIC CHALLENGE – INDIAN STATUS AND SOLUTIONS Srinjoy Chatterjee
1. Microplastic (MPs) now has emerged as an alarming environmental pollutant and its prevalence is now widely observed in various ecosystems.
2. The term “microplastic” coined by Thompson et al in the year 2004 basically represents heterogeneous mixture of smaller plastic fragments in the size range of 0.001-5 mm.
3. They may originate either directly (primary sources) through engineered particles such as microbeads/microfibers widely used in Personal Care Products or through fragmentation of larger plastic particles as a result of various anthropogenic activities (secondary sources).
Examples - Fragments of fishing gear, packages and drink bottles, synthetic textiles, car tyres, paints, and cosmetics. Natural breakdown through UV rays of sunlight, microbial processes, or through thermal oxidative processes also account for fragmentation of large plastic particles into MPs.
4. MPs basically consists of six major types of plastic products namely, Polyethylene (PE), Polypropylene (PP), Polyamide (PA), Polyvinyl Chloride (PVC), Polystyrene (PS), Polyurethane (PUR), and Polyethylene Terephthalate (PET).
.
.
.
WHAT ARE THE SOLUTIONS TO THIS MENACE?
1. SOLUTIONS BY REGULATORS, SCIENTISTS, GOVERNMENT AND MANUFACTURING INDUSTRIES.
Microplastics are tiny and may not be easily noticed as a treat to both sea and human life, therefore there is an urgent need to combat it. The potential risk to food security, and thereby human health, has led:
• regulators to call for better understanding education and public awareness of the fate and effects of microplastic debris on marine life.
• to the call for urgent actions by scientists (researching more) government (putting right policies in place) and the manufacturing industries on the need for the reduction of the production and activities resulting in the availability and spread of microplastic into the marine environment.
• To the need to strengthen international and regional cooperation in this area among: decision-makers researchers and academias to raise awareness in addressing water-related issues.
2. PUTTING IN PLACE APPRORIATE PROHIBITIONS, LAWS AND BANS.
The following should be done:
• For Countries: Prohibiting or disincentivizing land-based materials causing marine litter such as the use of microbead plastics for toothpaste.
• For Manufacturing: National law and sub-national law should be put in place.
• At Retail Level: National Law and sub-national law should be put in place.
3. MEASURES TO DO AS AN INDIVIDUAL.
• Report plastics pollutions e.g by using hashtag #plasticspollution with the photo, date and location.
• Cut down on plastics by staying clear of plastic products. Look for natural alternatives or reuseable containers. Don’t buy cleansers and cosmetics with microbeads.
• Clean-up plastic pollution. When possible use a pool or aquarium skimmer to remove plastics debris from the water and throw the debris in the garbage.
World Environment Day 2018's theme is "Beat Plastic Pollution". Plastic is ubiquitous and has benefits like being lightweight and inexpensive but causes major pollution problems. India generates a large amount of plastic waste and it affects many species like birds, fish, turtles and coral reefs by ingestion, entanglement, or blocking sunlight. Plastic pollution also transfers toxic chemicals into the food chain and human health. Individual actions like refusing single-use plastics and encouraging alternatives can help reduce plastic pollution.
This is a presentation which has ideal details of content related to plastics and its effects.It contains information edited from wikipedia and other sources. Hope its useful for learning kids.
Plastic pollution poses serious threats to both the environment and human health. Plastic waste accumulates in land and water bodies around the world, harming wildlife through entanglement and ingestion. Animals often mistake plastic for food due to its small size, which can cause starvation. Chemicals used in plastics' production and additives that leach out are linked to health issues like cancers and developmental problems in humans. Urgent action is needed to promote safer plastic alternatives and responsible waste disposal to mitigate these potential hazards.
This presentation discusses the growing issue of plastic pollution and its effects on the environment. It notes that human civilization has progressed through Stone, Bronze, and Iron Ages, and are now in the Plastic Age. Plastic is widely used for various domestic, medical, agricultural, and industrial purposes. However, plastic waste pollutes the lithosphere, hydrosphere, and atmosphere. Microplastics in particular enter the oceans and aquatic food chains, threatening biodiversity. Burning plastic releases toxic gases that pollute air and contribute to climate change. Potential solutions discussed include banning certain plastics, promoting bioplastics and alternative materials, and developing plastic-degrading enzymes.
This document discusses plastic pollution, its causes, effects, and ways to control it. It provides statistics on plastic production and waste. India generates over 9,000 tons of plastic waste per day, with Delhi being the highest plastic waste generator. The causes of plastic pollution include population growth, excessive plastic use, improper waste disposal, single-use plastics, and the shipping industry. Effects are on health, land, air, soil/groundwater, and marine life. Control measures proposed are reducing plastic use, proper disposal, recycling, and government bans on single-use plastics.
This document discusses the harms of plastic pollution and the plastic epidemic. It notes that plastic production has rapidly increased from 1.5 million tons in 1950 to over 320 million tons today, and is projected to double by 2034. Plastics contain chemicals like BPA and phthalates that disrupt human endocrine systems and are linked to issues like infertility, obesity, and cancer. Microplastics from degraded plastic are ubiquitous in water, food, and air. The document outlines various efforts underway to mitigate plastic pollution through ocean cleanup, bans on microbeads, development of biodegradable plastics, and reducing personal plastic use.
Kukor lect 1_What is enviro toxicol.pptFazilatShahid
Environmental toxicology is the study of the impacts of pollutants on ecosystems. It examines the effects of man-made chemicals on the environment, including their fate and transport within ecosystems and their toxic impacts on organisms, populations, communities, and ecosystem structure and function. Key figures in the development of the field include Rachel Carson, whose book Silent Spring raised awareness of indiscriminate pesticide use and helped drive legislation regulating chemical use and pollution. Environmental toxicology employs laboratory and field studies, as well as modeling, to understand how chemicals interact with ecosystems from the molecular to population level.
The Government of Pakistan has ratified major global conventions on climate change and developed a Framework for Implementation of the Climate Change Policy from 2014-2030 that lists short, medium, and long-term adaptation and mitigation actions. Pakistan also developed a National Policy on Climate Change and National Disaster Risk Reduction Policy in 2012 to mainstream climate change into vulnerable economic and social sectors. Initiatives promote rainwater harvesting and storage while the National Water Policy and Indus Water Treaty govern water sharing and management in the country.
The document discusses ambient air sampling methods. It defines ambient air as the air external to buildings that the public can access. Several air sampling techniques are described, including absorption in liquids, adsorption on solids, and freeze-out sampling to capture air pollutants like gases, vapors, dust and fibers. Common air pollutants measured through sampling include particulate matter, ozone, nitrogen dioxide, carbon monoxide and sulfur dioxide. Selection of sampling methods and filters depends on the phase and identity of the pollutant being measured.
The document discusses factors that affect Earth's climate, including the atmosphere, sun, oceans, wind, and position of continents. It describes five major climate zones defined by temperature and precipitation averages. Key climate controls are latitude, elevation, distance from water, ocean currents, and vegetation. The sun is the most important climate factor, and its energy is influenced by solar activity, Earth's orbit and tilt, and latitude. Other factors include the atmosphere and greenhouse effect, oceans as heat reservoirs, wind patterns, and shifting continents.
This document discusses guidelines for sampling ambient air and measuring air pollutants. It covers:
- The importance of accurate measurement of air pollutants that cause acid rain.
- Factors that affect measurement accuracy, such as fluctuations in flow rate.
- Key considerations for developing an effective survey plan, including selecting representative measurement points and proper installation heights.
- Methods for measuring flow rates and different techniques for sampling particulate matter and gases.
- Guidelines for proper use and storage of sampling equipment and filters to ensure accurate data collection.
The document discusses forests and rangelands in Pakistan. It notes that Pakistan has 4.01 million hectares of forest land, which makes up only 5% of its total land area. 85% of Pakistan's forests are public lands, including coniferous and scrub forests in northern hills and mangrove forests in the Indus delta. Though limited in area, forests play an important economic role in Pakistan by employing half a million people and meeting one-third of its energy needs. Forests and rangelands also support 30 million livestock and are important for soil conservation, water flow management, and reducing sedimentation.
This document discusses various types of pollution including water, air, soil, biological, nuclear, and chemical pollution. It defines each type and provides examples of sources and effects. Water pollution can come from direct point sources like factories or more diffuse non-point sources like agricultural runoff. Air pollution is caused by emissions from burning fossil fuels and other industrial activities. Soil pollution stems from construction, agriculture, and industrial waste. Biological pollution upsets ecological balances. Nuclear pollution contaminates the environment with radioactive materials. Chemical pollution includes warfare agents that can be lethal or incapacitating.
This document provides information about different types of pronouns. It defines pronouns as words used instead of nouns or other pronouns. There are six main types of pronouns discussed: personal pronouns, reflexive pronouns, intensive pronouns, indefinite pronouns, demonstrative pronouns, and interrogative pronouns. Each type is defined and examples are given for singular and plural forms.
This document discusses heavy metal uptake by organisms. It defines heavy metals as relatively dense, toxic metals found naturally in small amounts in soil, water and air. Some heavy metals like zinc and copper are essential nutrients in small amounts but become toxic at higher concentrations. Heavy metals can accumulate in organisms and biomagnify up the food chain. Specific heavy metals discussed include mercury, cadmium, chromium, lead and arsenic. For each, sources, health effects on humans and environments, and control/remediation strategies are summarized. Measurement methods for heavy metals include atomic absorption spectrophotometry and x-ray fluorescence.
Monetary policy aims to influence money supply and interest rates to achieve price stability and maximum employment. The document discusses various monetary policy tools like interest rates and their effects on investment, consumption, employment and inflation. It also discusses the role of central banks in implementing monetary policy through tools like adjusting interest rates and money supply. The upcoming monetary policy meeting of the State Bank of Pakistan is expected to maintain current interest rates given recent improvements in trade deficit and currency stability, though a rate hike is still possible due to high inflation.
The document discusses bioremediation as a process that uses microorganisms to remove pollutants from the environment through metabolic processes. It provides an introduction to bioremediation and defines it as using biological organisms like bacteria, fungi and algae to remove environmental pollutants. The document then discusses heavy metals as a type of pollution, sources of heavy metal pollution, and methods to remove heavy metal pollution including bioremediation and phytoremediation using plants.
Soil formation, also known as pedogenesis, is influenced by several key factors:
Climate, especially temperature and precipitation, determines the rate of weathering and types of organic materials. Time is also important, as soils take many years to fully form and may change types over centuries. The parent material and topography impact drainage and erosion patterns during soil development. Biological factors like plants, animals, microbes, and humans also influence soil formation through their physical interactions and chemical exchanges with the soil.
The key factors that influence soil formation are climate, parent material, topography, organisms, and time. Climate, especially temperature and precipitation, determines the rate of weathering and types of organic material. Parent material provides the initial minerals and properties. Topography influences moisture and temperature. Organisms like plants and microbes break down materials and mix the soil. Finally, soil formation is a long process, and soils change and develop over hundreds of years as these factors interact.
The document summarizes Edgar Allan Poe's short story "The Tell-Tale Heart". It provides a brief biography of Poe, an overview of the plot where a narrator kills an old man he lives with and hides his body, and then confesses to the murder when he thinks he hears the dead man's heart beating under the floor. The document also categorizes elements of the story as incidents of horror and provides a character sketch of the killer as a sensitive but cruel and psycho person. It concludes with the killer confessing his crime to misguided police.
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Aromatic compounds , Ions , and radicals.pptxFazilatShahid
This document provides an overview of aromatic compounds, ions, and radicals. It begins with an introduction to aromatic compounds, using benzene as an example. It discusses the preparation and reactions of benzene. Next, it covers ions, including the history of ions, examples of cations and anions, and their natural occurrence. Finally, it defines radicals, how they are formed, and factors that contribute to their stability, such as electronegativity and delocalization.
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[4:55 p.m.] Bryan Oates
OJPs are becoming a critical resource for policy-makers and researchers who study the labour market. LMIC continues to work with Vicinity Jobs’ data on OJPs, which can be explored in our Canadian Job Trends Dashboard. Valuable insights have been gained through our analysis of OJP data, including LMIC research lead
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2. Content
• Introduction, Background
• Properties of microplastic, Types of microplastic
• Chemical related to microplastic, Behaviour of microplastic particle in water
• Sources of microplastic
• Effects of microplastic
• Control measures
• Conclusion
4. Introduction
• The small plastic fragments disposed in the marine habitat having dimensions ≤ 5
mm are defined as microplastics2.
• These tiny plastics can be consumed by different marine biota including corals,
planktons, marine invertebrates, fish and whales and are ultimately transferred
along the food chain3.
• These plastic polymers directly pose a great threat to marine organisms and also
indirectly affect the ecosystem by adsorbing other marine pollutants.
5. Background
• In the past six decades, we have produced more than 8.4 billion tons of plastics.
Most of it has now ended up in a landfills or directly in our natural environment.
• Only 9% of the plastic used today is recycled.
• Up to 12 million tons of plastic enter our oceans every year.
• Plastic waste on the streets can also get into the ocean via drainage networks or
rivers.
6. Synthetic Materials
• Synthetic materials (polymers, microplastics or plastics) are one of the causes of
our global environmental pollution.
• Microplastics were first detected in large numbers in the world’s oceans in 2004.
• Microplastics is a young research area with many unknowns. Science, industry,
and politics are facing enormous challenges in order to grasp the phenomenon in
all its complexity and to find effective solutions against the further spread of
microplastics.
7. Marine Pollution
• Marine pollution by plastic litter has been a major global environmental issue in
recent decades, and global concern over the problems resulting from end-of-life
plastic have grown rapidly since the presence of microscopic plastic particles in
the ocean
• Small fragments of plastic litter in the environment present different challenges to
larger items, which has been widely documented since the 1960s.
8. Continued...
• Smaller plastics become more bioavailable (or ingestible) particularly to small
organisms.
• Because of their size detecting the presence of microplastics and adverse
biological effects, if toxicants comes considerably more challenging.
• Microplastics have been observed on the shore, sea surface, and seabed from the
coast to the open ocean, including the arctic.
9. Properties of Microplastics
Microplastics consist
of carbon and hydrogen atoms bound
together in polymer chains. Other
chemicals, such as
phthalates, polybrominated diphenyl
ethers (PBDES), and tetrabromobi
sphenol A (TBBPA), are typically also
present in microplastics, and many of
these chemical additives leach out of the
plastics after entering the environment.
10. Primary Microplastics Type A
• Primary microplastics type A categorizes and regards microplastics as a
chemical. This category includes the types that are added directly to products
(e.g. Personal care products, cleaning agents, paints, etc.). This proportion is
already often replaced by water-soluble polymers ("liquid microplastics").
Products are then often "advertised" with the addition "free of microplastics" or
"without microplastics".
11. Secondary microplastics
• Secondary microplastics include all
microplastic particles that are formed
in the environment as a result of the
slow decay of large plastic parts. This
can happen through all kinds of
external influences, e.G. Through the
influence of UV rays, bacteria or
friction.
12. Phthalates
• Used to make plastic less brittle.
• Often found in cosmetics, packaging, cases for consumer electronics
• Not tightly bound within the plastic molecules
• Linked to birth defects, reduced fertility, and brain disorders in children
13. BPA
• Makes plastic tough.
• Allows plastic to be used to make food containers, sports equipment, and DVDs
• Used to line food and beverage cans to keep them from corroding
• Most susceptible to its effects are children and women of child-bearing age
14. Dioxins
• Dioxins are a family of chemicals that stay in the body for years.
• The toxicity of dioxins varies widely; some types are poisonous.
• High exposures result in skin and liver disease, but such exposure levels are rare.
• Dioxins are known to cause cancer but at what dosage is unknown
15. Other Chemicals
• Over time some plastics will leach out lead, cadmium and other heavy metals
• Some chemicals left in plastic from manufacturing are especially poisonous to
marine life, like copper chloride or methanol.
• Pbdes are flame retardants and were added to children’s sleepwear, furniture,
and other products.
• widespread in the environment; studies have linked pbdes to a reduction in IQ in
children
16. Behavior of Microplastics in Water
Physical behavior
• Migration
• Sedimentation
Chemical behaviors
• Degradation
• Adsorption
Bio behaviors
• Ingestion
• Translocation
17. Sources of Microplastic
• The presence of these hazardous plastic fragments in the ecosystem ( due to
terrestrial and aquatic) is due to different arthopegenic activities which
include domestic , industrial activities
• The introduction of microplastics in the aquatic ecosystem is mainly because
of the domestic runoff which contain microbeads and microplastic fragments
(used in cosmetic and other consumer products) and also from the
fragmentation of the large plastic trash.
18. Continued...
• The plastic manufacturing industries release plastics in the form of pellets and
resin powders produced from air-blasting which ultimately contaminate the
aquatic environment.
• Also the coastal activities which include fishing practices, aqua tourism activities
and marine industries are the sources of microplastic pollution in the marine
ecosystem.
19. Continued...
• Microplastics once entered in the marine habitat are exposed to different physic-
chemical processes such as biofouling and leaching or incorporation of secondary
pollutants.
• Microplastics have different shapes, size and density, and according to these
features, plastic fragments have distributed in different compartments of the
marine ecosystem (finally settle down to benthos) and are available for the marine
biota
20. Continued...
• The pelagic marine biota which consists of planktons and crustaceans are
exposed to low density microplastics whereas benthic organisms such as
polychaete and tubifex worms, amphipods and mollusks are known to encounter
with dense microplastics.
• Thee settling rate of microplastics through the water column varies depending on
different factors such as polymer type, biofouling and surface chemistry of the
particles.
21. Effects of Microplastic
• Interaction with marine biota
• Microplastic in fish
• Microplastics in another marine biota
• Microplastics in sea salt
22. Interaction With Marine Biota
• As the abundance of microplastics increases
• Its bioavailability to marine organisms also increases the color, density, shape,
size, charge and aggregation
• Abundance of these tiny plastic particles affect their potential bioavailability to
marine organisms
• Biological interactions of microplastics with marine biota are key to understanding
the movement
• Microplastics contain organic pollutants
23. Continued…
• The ingestion of microplastic particles by marine biota have increased
• The ingestion of microplastic particles has been observed in oceanic regions
globally in a wide range of marine organisms
• Absorbed from seawater thereby serving as scavengers and transporters of organic
contaminants
• Adsorption is both a physical and chemical behavior.
• Physical adsorption is dependent on the great specific surface area and van der
waals' force
24. Microplastic in Fish
• The presence of chemicals in fish tissues which are the same chemicals that form
plastics
• The ingested and accumulated microplastic particles which ranged in size from 1
to 20 μm, in high concentrations
• Being carried out to demonstrate the impacts of microplastics on marine biota.
• The transfer of microplastics and potentially harmful substances between different
trophic levels in the marine environment.
25. Microplastics in Another Marine Biota
• The issue of microplastic ingestion is not restricted to fish alone; zooplankton and
sea turtles are also susceptible to microplastics
• The organisms were subjected to low and high doses of biodegradable and
conventional microplastics for 60 days
• Outdoor mesocosm studies were carried out on the effect of microplastics on the
health
• Microplastic ingestions were 1 particle per every 34 copepods and 1 particle per
every 17 euphausiids
Example
• An example is the salmon fish of the northwest coast of north america which has
been reported to feed heavily on euphausiids and copepods.
26. Microplastics In Sea Salt
• Abiotic sea products are a source of food for humans
• The presence of microplastics in sea salt has recently been proven
• That detected 7–204 particles kg−1, 550–681 particles kg−1 and 43– 364 particles
kg−1 of microplastics in 15 brands of rock/well salts, sea salt, and lake salt,
respectively.
• The microplastics found were polyethylene, cellophane, and polyethylene
terephthalate.
• This demonstrates that along with fish and shellfish
27. Removing Plastic Microbeads From Personal Care
Products
• In 2015, the US government introduced the microbeads free waters act
(2015) banning the sale of personal care products containing plastic
microbeads, effective on 2017.
• Other regions including canada, australia, and several european countries
are encouraging phase outs or bans of plastic microbeads.
• More countries are likely to adopt similar bans thereby eliminating a major
source of microplastics.
28. Use Of Biodegradable Materials
• Biodegradable/biocompatible plastics such as polylactatide (PLA),
polyhydroxyalkanoates (PHA) and others are commercially available and
can replace traditional plastics for many applications.
• An example would be manufacture of microbeads made from pha and pla.
29. Improved Reuse, Recycle And Recovery Of Plastics
• Improved solid waste infrastructure and management will decrease plastic debris
entering rivers and the ocean
• decrease the rate of microplastics accumulation
• Multiple uses of plastic products can also significantly reduce plastic wastes and
decrease formation of microplastics
• Recycling of used plastics is an effective approach
• The use waste plastic as energy source and recovery of waste plastics as synthetic
crude and valuable products will also reduce sources of microplastics.
30. Improved Separation Efficiency At WWTP
• Existing wastewater treatment facility should be upgraded to remove microplastics
efficiently to prevent microplastics from entering surface waters, such as rivers
and ocean.
• Modification of filters within washing machines would be one simple and
effective way of preventing microplastics fibers from entering sewer.
31. Development Of And Bioremediation Technologies
• The microbial biodegradation of petroleum based plastics, especially polyethylene
(PE), polypropylene ( PP ) polystyrene ( PS) ,has been evaluated since the 1970s.
• Several fungi biodegrade pur, pe, pp and ps are generally considered non-
biodegradable without heat or uv pretreatment and can thus persist in natural
environments for hundreds of years. However, recent research indicates a potential
for biodegradation of PE, PS and PET.
• Bacterial strains of bacillus and enterobacter asburiae degrading pe and
exiguobacterium degrading ps were isolated from the guts of pest insect larvae of
plodia interpunctella (waxworms or indian moth) and tenebrio molitor
(mealworms) respectively
32. Continued...
• Ps foam is completely mineralized in mealworms’ gut within 12–24 hours
• International collaboration is needed to clean up plastic debris on the ocean and
to reduce the major source of ocean microplastics.
• Recent research offers reason for hope. Future research should assess whether
microbial genes involved in plastics degradation have begun to spread in the
environment.
• Research is also needed to develop strategies for in biodegradation of
microplastics by addition of microorganisms or by enhanced natural decrease
using native microflora.
33.
34. Conclusion
• Plastic pollution in the marine ecosystem is
an issue of concern nowadays.
• Its deleterious effects on marine biota.
• Due to the size of micro plastics, their
bioaccumulation potential is very high.
• Primary micro plastics are globally a major
source of plastics into the oceans.
• It’s size between 0.8 and 2.5.
35. Continued…
• The best solution is to stop producing it further and find out the alternative of
plastic products.
• Reduce your use of single-use plastics
• Recycle properly
• Participate in (or organize) a beach or river cleanup