Assessment of arsenic exposure from groundwater and rice in Bengal Delta Region, West Bengal, India

Chatterjee, Debashis and Halder, Dipti and Majumder, Santanu and Biswas, Ashis and Nath, Bibhash and Bhattacharya, Prosun and Bhowmick, Subhamoy and Mukherjee-Goswami, Aishwarya and Saha, Debasree and Hazra, Rasmani and Maity, Palash B. and Chatterjee, Debankur and Mukherjee, Abhijit and Bundschuh, Jochen (2010) Assessment of arsenic exposure from groundwater and rice in Bengal Delta Region, West Bengal, India. Water Research, 44 (19). pp. 5803-5812. ISSN 0043-1354

Abstract

(As) induced identifiable health outcomes are now spreading across Indian subcontinent with continuous discovery of high As concentrations in groundwater. This study deals with groundwater hydrochemistry vis-à-vis As exposure assessment among rural population in Chakdaha block, West Bengal, India. The water quality survey reveals that 96% of the tubewells exceed WHO guideline value (10 μg/L of As). The groundwaters are generally anoxic (−283 to −22 mV) with circum-neutral pH (6.3 to 7.8). The hydrochemistry is dominated by HCO3− (208 to 440 mg/L), Ca2+ (79 to 178 mg/L) and Mg2+ (17 to 45 mg/L) ions along with high concentrations of AsT (As total, below detection limit to 0.29 mg/L), FeT (Fe total, 1.2 to 16 mg/L), and Fe(II) (0.74 to 16 mg/L). The result demonstrates that Fe(II)–Fe(III) cycling is the dominant process for the release of As from aquifer sediments to groundwater (and vice versa), which is mainly controlled by the local biogeochemical conditions. The exposure scenario reveals that the consumption of groundwater and rice are the major pathways of As accumulation in human body, which is explained by the dietary habit of the surveyed population. Finally, regular awareness campaign is essential as part of the management and prevention of health outcomes.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version due to publisher copyright policy.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 13 Oct 2014 03:16
Last Modified: 11 Nov 2014 01:54
Uncontrolled Keywords: arsenic exposure; hydrochemistry; fe cycling; redox chemistry; rice; rRisk assessment
Fields of Research : 05 Environmental Sciences > 0502 Environmental Science and Management > 050204 Environmental Impact Assessment
04 Earth Sciences > 0406 Physical Geography and Environmental Geoscience > 040603 Hydrogeology
Identification Number or DOI: 10.1016/j.watres.2010.04.007
URI: http://eprints.usq.edu.au/id/eprint/26183

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