Arsenic as pollutant factor
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The document discusses arsenic contamination of drinking water and how biosorption can be used to remove arsenic. It provides background on arsenic, describing its properties and common sources of contamination including mining and groundwater. Biosorption uses biomass to remove toxins like arsenic from water in an eco-friendly way. It has advantages over other treatments in being cost-effective and allowing for metal recovery and regeneration of the biosorbent. Biosorption shows potential as an economical solution for removing arsenic from drinking water supplies.
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removal of iron and lead from wastewater. Ocimum sanctum
(Tulsi) a medicinal plant, is used for the removal of heavy metals
from wastewater.
History, Classification, Uses of organic chemistry
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arsenic toxicity .pptx
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Toxicity of metallic species, Aresenic.pdf
Introduction, images of Arsenic, Industrial Uses and pollution sources, Speciation of Arsenic, Environmental levels and ecological effects, Biochemical effects, toxicology and toxicity, Treatment for Arsenic poisoning, Control measures.
Scientific Facts on Arsenic
Arsenic is a poisonous substance, which is released both from certain human activities and naturally from the Earth's crust.
Humans may be exposed to arsenic mainly through food and water, particularly in certain areas where the groundwater is in contact with arsenic-containing minerals.
To what extent can arsenic exposure affect human health or the environment?
Intro to Organic chemistry
Organic Chemistry
1. History
2. Properties of Organic Chemistry
3. comparison of Compounds
4. Sources of Organic Compounds
5. Types of Organic Compounds
6.Types of Organic Formula
7. Carbon
8. Structural Formulas of Carbon
9. Isomerism
10 Classification of Organic Compounds
11. HydroCarbons
Arsenic - BIOL 415 Ecotoxicology Draft
This document provides an overview of arsenic, including its discovery, chemical properties, different forms (inorganic vs organic), sources (natural, anthropogenic), mechanisms of toxicity, health effects, and case studies. It discusses how arsenic interferes with cellular processes like glycolysis and the citric acid cycle through substituting for phosphate or binding to thiol groups. Both acute and chronic arsenic poisoning can cause nausea, vomiting, skin lesions, and increased cancer risk. Case studies highlight mass poisonings from contaminated food/water in Bangladesh, Japan and the UK.
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Arsenic Almost Final Slides
The document provides an overview of arsenic, including its discovery, chemical properties, different forms (inorganic vs organic), sources (natural, anthropogenic), mechanisms of toxicity, health effects, regulation, and references for further information. It discusses how arsenic interferes with cellular processes through inhibition of enzymes and production of reactive oxygen species, leading to acute or chronic poisoning. Higher arsenic exposure has been linked to conditions like skin lesions, cancer, and reduced growth in children. Regulations set maximum limits in drinking water but food sources require further standards.
Toxicity of Arsenic
Arsenic is a heavy metal occurring naturally in the environment. It's low concentration is important for various life processes on the Earth but the misuse and overexploitation of mineral resources caused the arsenic contamination to natural resources, which in turn get exposed to living beings causing various toxicity problems and severe health issues. Arsenic has not remained an important mineral for sustaining life but it becomes a category pollutant for which heavy precautions should be taken to avoid an exposure.
بلادی و همکاران
This study evaluated the ability of the plant species Sainfoin (Onobrychis vicifolia) to absorb and tolerate heavy metals lead and copper. A greenhouse experiment was conducted with different levels of lead and copper contaminated soil. The results showed that Sainfoin was able to absorb significant amounts of both lead and copper into its roots and aerial parts, with greater absorption of copper. Higher metal concentrations in the soil led to increased antioxidant enzyme activity and biomarkers of oxidative stress in the plant. Specifically, the highest metal levels caused the greatest increases in enzymes like superoxide dismutase, catalase and glutathione peroxidase, as well as biomarkers like malondialdehyde, dityrosine and 8-hydroxy-2-de
Ecology & pollution control in textile industry
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Heavy metals
The document discusses heavy metals, which are defined as metallic elements that are relatively dense and toxic in low concentrations. Common heavy metals include aluminum, antimony, arsenic, barium, bismuth, cadmium, lead, mercury, nickel, uranium, and tin. Heavy metals enter the human body through food and water. While some heavy metals like iron and zinc are essential nutrients, others such as cadmium and lead are highly toxic even in small amounts. Sources of heavy metal exposure include mining, industrial waste, vehicle emissions, and food/water contamination. The document provides details on specific heavy metals like cadmium, chromium, arsenic, and lead, their sources, and health effects.
Presentation iyc
The document discusses the definition and characteristics of science, describing it as both a body of knowledge and process of discovery that seeks to understand the natural world through questions, evidence, and collaboration. Several fields of science are outlined including chemistry, which is celebrated in 2011 as an international year focusing on its contributions to society. The document also provides examples of scientists throughout history and some interesting facts about chemistry.
Presentation on biogeochemical cycles 2
The document summarizes key aspects of the nitrogen and phosphorus biogeochemical cycles. It defines biogeochemical cycles and describes the major types. It then provides details on the nitrogen cycle, including its ecological and biological functions, the processes of nitrogen fixation, ammonification, nitrification, and denitrification. It also discusses how human activities have influenced the nitrogen cycle through increased nitrogen fixation and emissions. Similarly, it outlines the phosphorus cycle, its functions, processes, and how human overuse of phosphorus fertilizers has polluted bodies of water and harmed ecosystems.
Organisms and Environment Exercise - MH-CET 2015
i. Carbon dioxide plays a crucial role in global warming by trapping infrared radiation in the atmosphere and increasing temperatures. CO2 levels have increased 50% over the last 50 years due to human activities like burning fossil fuels.
ii. Agrochemicals kill beneficial soil microbes and cause pest resistance, pollution, bioaccumulation of toxic chemicals, and health issues for farmers. Only 15% of chemicals hit targets, while the rest pollutes nearby areas.
iii. The carbon cycle involves the exchange of carbon between the atmosphere, oceans, plants, animals and fossil fuels through photosynthesis, respiration, and the weathering of carbonate rocks. Human activity like burning fossil fuels is greatly interfering with the natural carbon cycle
ρύπανση εδάφους 1
The Asopos River in Greece has been heavily polluted for decades by untreated industrial waste and sewage. Hexavalent chromium levels in some areas are 50 times the legal limit. Agriculture in the region also contributes to pollution through fertilizer and pesticide use. Decades of uncontrolled dumping have contaminated surface water, groundwater, soils, and marine environments near the river's estuary. Recent efforts aim to strictly control pollution sources and clean up contaminated areas to restore the river's ecosystem.
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