Arsenic
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Silver is a natural metal found in the earth's crust that is used in semiconductor, solar cell, and optoelectronic device applications. Arsenic occurs naturally in groundwater and foods but is also released from mining, glass processing, and burning fossil fuels. Long term exposure to arsenic can cause skin pigmentation changes and lesions as well as developmental, neurological, and cardiovascular health effects. Water treatment methods like precipitation, sedimentation, coagulation, filtration, oxidation, and adsorption can be used to remove arsenic.
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Arsenic
- 1. Anup Ghimire Rock Face Limited
- 2. Natural inorganic silver grey or white brittle odourless and tasteless metal. GroupV element in periodic table 20th position for its abundance in the earths crust, 14th in sea water and 12th in human body.
- 3. Mining, glass processing and landfill leaching Semiconductor applications, solar cells and opto- electronic devices Soil sterilizers, glassware production, polymerisation of unsaturated compounds
- 4. Distributed in air, soil and water. Foods such as meat, fish, poultry, grain and cereals. Arsenic occurs in groundwater as oxidised forms (As (III)) and reduced forms (As (V)).
- 6. Arsenic sulfide, arsenic rich pyrite and arsenic rich iron oxyhydrides Agrochemicals, wood preservatives, industrial waste disposal, mining and mineral processing, acid mine drainage and burning of fossil fuels.
- 7. Acute Health Effects: vomiting, abdominal pain and diarrhoea. Long term exposure: pigmentation changes, skin lesions, hard patches on the palms and soles of the feet (hyperkeratosis), developmental effects, neurotoxicity, diabetes and cardiovascular diseases
- 8. Precipitation Sedimentation Coagulation Conventional Filtration Oxidation Adsorption Membrane Filtration