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Review of processes controlling arsenic retention and release in soils and sediments of Bengal basin and suitable iron based technologies for its removal

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Title Review of processes controlling arsenic retention and release in soils and sediments of Bengal basin and suitable iron based technologies for its removal
 
Creator Banerji, Tuhin
Kalawapudi, Komal
Salana, Sudheer
Vijay, Ritesh
 
Subject Hydrobiology, Ecology etc.
Water Treatment
 
Description Arsenic in the soil environment has gained renewed interest because of the emerging cognizance that arsenic
poisoning is a global concern. Groundwater in the Bengal Basin is significantly polluted by naturally occurring
arsenic (As), a toxic metalloid, which adversely affects human health and among the countries facing As contamination
problems, India and Bangladesh are the most affected. In soils and sediments, arsenic is often associated
with Fe(III) (hydr)oxides and multiple processes/reactions govern its release into groundwater, including
abiotic or biotically mediated oxidation-reduction and ligand exchange reactions. Reductive dissolution
of arsenic-bearing Fe(III) (hydr)oxides and As(V) reduction to As(III) are the two main mechanisms controlling
arsenic partitioning in soils, sediments and groundwater. Even though arsenic reduction is favourable over a
wide range of conditions, Fe(III) reduction in nature is dependent on the biotic systems. This review reflects the
current state of research for the understanding of arsenic in the soil environment with an emphasis on iron based
technologies for its removal. It attempts to collate all the relevant literature such that it can be a useful resource
for researchers or policy makers to help recognize and explore useful treatment options.
 
Publisher Elsevier
 
Date 2019
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1164/1/1-s2.0-S2352801X17302230-main.pdf
Banerji, Tuhin and Kalawapudi, Komal and Salana, Sudheer and Vijay, Ritesh (2019) Review of processes controlling arsenic retention and release in soils and sediments of Bengal basin and suitable iron based technologies for its removal. Groundwater for Sustainable Development, 8. pp. 358-367. ISSN 2352-801X
 
Relation http://www.elsevier.com/locate/gsd
http://neeri.csircentral.net/1164/