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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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2016 (English)In: Arsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, AS 2016, CRC Press/Balkema , 2016, 62-63 p.Conference paper, Published paper (Refereed)
Abstract [en]

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. 

Place, publisher, year, edition, pages
CRC Press/Balkema , 2016. 62-63 p.
Keyword [en]
Aquifers, Arsenic, Calcium, Groundwater, Groundwater pollution, Groundwater resources, Hydrogeology, Silicates, Sustainable development, Watersheds, Arsenic enrichments, Controlling factors, Crustal recycling, Groundwater chemistry, Groundwater composition, Hydrogeochemical evolution, Incompatible element, Negative correlation, Hydrochemistry
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-207546Scopus ID: 2-s2.0-85016946534ISBN: 9781138029415 (print)OAI: oai:DiVA.org:kth-207546DiVA: diva2:1103791
Conference
6th International Congress on Arsenic in the Environment, AS 2016, 19 June 2016 through 23 June 2016
Note

Conference code: 175559; Export Date: 22 May 2017; Conference Paper; Funding details: CSIR, Council of Scientific and Industrial Research; Funding text: SV acknowledges CSIR (Government of India) for providing CSIR-SR Fellowship. The author acknowledges support of IIT Kharagpur for providing laboratory analyses facilities. QC 20170531

Available from: 2017-05-31 Created: 2017-05-31 Last updated: 2017-05-31Bibliographically approved

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Bhattacharya, Prosun

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