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Groundwater arsenic in the fluvial Bengal plains: geochemistry and mitigation
Univ Kalyani, Dept Chem, Nadia 741235, India.;Heritage Inst Technol, Dept Chem Technol, Kolkata 700107, India..
Univ Kalyani, Dept Chem, Nadia 741235, India.;Univ Sydney, Sch Geosci, Sydney, NSW 2006, Australia..
Univ Kalyani, Dept Chem, Nadia 741235, India.;Kanchrapara Coll, Dept Chem, Kanchrapara 743145, India..
Univ Kalyani, Dept Chem, Nadia 741235, India.;Univ Girona, Dept Chem, Girona 17071, Spain..
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2013 (English)In: PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL SYMPOSIUM ON WATER-ROCK INTERACTION, WRI 14 / [ed] Hellmann, R Pitsch, H, ELSEVIER SCIENCE BV , 2013, p. 143-146Conference paper, Published paper (Refereed)
Abstract [en]

The water quality and chemistry of the groundwater of the fluvial Bengal plains have been investigated. It has been found that shallow aquifers (< 50 m bgl) are contaminated in a few pockets, surrounded by areas with low arsenic (As)/As-free groundwater, while the deeper aquifer (> 100 m bgl) is generally free from As (< 10 mu g/L). It also reveals that multiple As mobilization processes are occurring simultaneously, rather than any single geochemical process. An attempt has been made to demonstrate the degree of As heterogeneity with groundwater quality, and this has been followed by a few local conditions. The study further suggests that the As distribution (spatio-vertical) helps to identify safe shallow aquifers, and several signatures (colour of the sediments /land use pattern/ geomorphological features /local recharge events) are apparent that can be useful for formulating long-term mitigation options.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2013. p. 143-146
Series
Procedia Earth and Planetary Science, ISSN 1878-5220 ; 7
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-240274DOI: 10.1016/j.proeps.2013.03.014ISI: 000321664000035OAI: oai:DiVA.org:kth-240274DiVA, id: diva2:1270690
Conference
14th International Symposium on Water-Rock Interaction (WRI), JUN 09-14, 2013, Avignon, FRANCE
Note

QC 20181214

Available from: 2018-12-14 Created: 2018-12-14 Last updated: 2019-02-05Bibliographically approved

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Biswas, AshisHalder, Dipti

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