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    Solute chemistry and groundwater arsenic enrichment in southern part of Brahmaputra River Basin, India, adjacent to Indo-Burmese ranges

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    Authors
    Verma, S.
    Mukherjee, Abhijit
    Mahanta, C.
    Choudhury, R.
    Bhattacharya, P.
    Date
    2016
    Type
    Conference Paper
    
    Metadata
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    Citation
    Verma, S. and Mukherjee, A. and Mahanta, C. and Choudhury, R. and Bhattacharya, P. 2016. Solute chemistry and groundwater arsenic enrichment in southern part of Brahmaputra River Basin, India, adjacent to Indo-Burmese ranges, pp. 62-63.
    Source Title
    Arsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, AS 2016
    ISBN
    9781138029415
    URI
    http://hdl.handle.net/20.500.11937/66819
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 Taylor & Francis Group, London. The present study examines the groundwater chemistry, hydrogeochemical evolution and Arsenic (As) enrichment in shallow aquifers in the southern Brahmaputra river basin situated close to Naga-thrust belt. The major-ion composition dominated by a Na?Ca?HCO3 and Ca?Na?HCO3 hydro-chemical facies. Groundwater composition influenced by silicates weathering in S-region of Brahmaputra basin aquifers. The aquifers of S-region are severely contaminated with As (max 0.45 mg/L), nearly 92% collected groundwater sample are enriched with As. As show poor and negative correlation with various redox—sensitive solutes. It suggests that not a single process is controlling factor, although multiple biogeochemical mechanisms might influence As liberation and fate in groundwater of S-region. The geologic explanation for high arsenic in the southern region of Brahmaputra basin (upper Assam) is probably the crustal recycling of arsenic as an incompatible element during tectonic activity.

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      Verma, S.; Mukherjee, Abhijit; Choudhury, R.; Mahanta, C. (2015)
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