WFRF:(Mahanta C)
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Source, distribution and release mechanisms of arsenic in the groundwater of Assam floodplains of Northeast India
- Mahanta, C. (författare)
- Pathak, N. (författare)
-
- Bhattacharya, Prosun (författare)
- KTH,Mark- och vattenteknik
- visa fler...
- Enmark, G. (författare)
- Nordborg, D. (författare)
- visa färre...
- (creator_code:org_t)
- 2012-04-26
- 2008
- Engelska.
- Ingår i: World Environmental and Water Resources Congress 2008: Ahupua'a - Proceedings of the World Environmental and Water Resources Congress 2008. - Reston, VA : American Society of Civil Engineers. - 9780784409763
- Konferensbidrag (refereegranskat)
Abstract
Ämnesord
Stäng
- This study conducted in Bongaigaon and Darrang districts of Assam, India is based upon water chemistry and sediment characteristics investigation in an reportedly arsenic infested belt. Of total 50 sampled wells, 15 had arsenic concentration above national drinking water standard of 50 μg/l, and 33 had As concentrations above the WHO guideline of 10 μg/l. However no distinct zones or depths with specific sedimentological features could be identified. Sediments with colour on green-olive scale are probably more likely to bear As contaminated water than white sediments. Sand filters used to reduce high iron content seem to reduce As content of water effectively. Arsenic rich water is also partly avoided since drillers seek water low in iron, which is often also low in arsenic content. Reductive dissolution of Ferric hydroxides is believed to be the release mechanism controlling the mobility of arsenic, rather than oxidation of arsenopyrite or pH induced desorption.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Miljöbioteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Biotechnology (hsv//eng)
Nyckelord
- Arsenic
- Flood plains
- Groundwater management
- India
- Arsenic concentration
- Arsenic content
- As content
- Contaminated water
- Drinking water standards
- Ferric hydroxide
- Iron content
- Reductive dissolution
- Release mechanism
- Sand filter
- Sediment characteristic
- Water chemistry
- Desorption
- Dissolution
- Groundwater
- Potable water
- Sedimentology
- Water management
- Water pollution
- Water supply
- Water content
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)
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- Mahanta, C.
- Pathak, N.
- Bhattacharya, Pr ...
- Enmark, G.
- Nordborg, D.
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