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Arsenic mobilizatio...
Arsenic mobilization in the aquifers of three physiographic settings of West Bengal, India : Understanding geogenic and anthropogenic influences
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Bhowmick, S. (author)
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Nath, B. (author)
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- Halder, Dipti (author)
- KTH,Mark- och vattenteknik
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- Biswas, Ashis (author)
- KTH,Mark- och vattenteknik
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Majumder, S. (author)
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Mondal, P. (author)
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Chakraborty, S. (author)
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Nriagu, J. (author)
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- Bhattacharya, Prosun (author)
- KTH,Mark- och vattenteknik
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Iglesias, M. (author)
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Roman-Ross, G. (author)
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Guha Mazumder, D. (author)
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Bundschuh, J. (author)
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Chatterjee, D. (author)
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(creator_code:org_t)
- Elsevier BV, 2013
- 2013
- English.
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In: Journal of Hazardous Materials. - : Elsevier BV. - 0304-3894 .- 1873-3336. ; 262, s. 915-923
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- A comparative hydrogeochemical study was carried out in West Bengal, India covering three physiographic regions, Debagram and Chakdaha located in the Bhagirathi-Hooghly alluvial plain and Baruipur in the delta front, to demonstrate the control of geogenic and anthropogenic influences on groundwater arsenic (As) mobilization. Groundwater samples (n=90) from tube wells were analyzed for different physico-chemical parameters. The low redox potential (Eh=-185 to -86mV) and dominant As(III) and Fe(II) concentrations are indicative of anoxic nature of the aquifer. The shallow (<100m) and deeper (>100m) aquifers of Bhagirathi-Hooghly alluvial plains as well as shallow aquifers of delta front are characterized by Ca2+HCO3 - type water, whereas Na+ and Cl- enrichment is found in the deeper aquifer of delta front. The equilibrium of groundwater with respect to carbonate minerals and their precipitation/dissolution seems to be controlling the overall groundwater chemistry. The low SO4 2- and high DOC, PO4 3- and HCO3 - concentrations in groundwater signify ongoing microbial mediated redox processes favoring As mobilization in the aquifer. The As release is influenced by both geogenic (i.e. geomorphology) and anthropogenic (i.e. unsewered sanitation) processes. Multiple geochemical processes, e.g., Fe-oxyhydroxides reduction and carbonate dissolution, are responsible for high As occurrence in groundwaters.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Annan geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Other Earth and Related Environmental Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Vattenteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Water Engineering (hsv//eng)
Keyword
- Aquifers
- Arsenic
- Bengal Delta Plain
- Geomorphology
- Land use
- West Bengal
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Bhowmick, S.
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Nath, B.
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Halder, Dipti
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Biswas, Ashis
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Majumder, S.
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Mondal, P.
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show more...
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Chakraborty, S.
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Nriagu, J.
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Bhattacharya, Pr ...
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Iglesias, M.
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Roman-Ross, G.
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Guha Mazumder, D ...
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Bundschuh, J.
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Chatterjee, D.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Other Earth and ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Civil Engineerin ...
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and Water Engineerin ...
- Articles in the publication
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Journal of Hazar ...
- By the university
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Royal Institute of Technology