Microbial characterization of Holocene alluvial sediments in the Meghna flood plain of Matlab Upazila, Bangladesh

Gunaratna, K. R. and Shokri, A. and Bhattacharya, P. and Jacks, G. and Bundschuh, J. and von Bromssen, M. (2010) Microbial characterization of Holocene alluvial sediments in the Meghna flood plain of Matlab Upazila, Bangladesh. In: 3rd International Congress on Arsenic in the Environment (AS 2010): Arsenic in Geosphere and Human Diseases , 17-21 May 2010, Tainan, Taiwan.

Abstract

The presence of elevated levels of arsenic (As) in groundwater in Bangladesh, has undermined the decade long success of supplying 98% of its popu­lation with safe drinking water and an estimated population of 35 million in the country are at risk. The source of As is geogenic and redox condi­tions of the sedimentary aquifer are a dominant control on the mobility of As in natural sediment­ water system. Reductive dissolution of Fe oxyhy­droxides in the aquifer sediments is considered as a primary mechanism responsible for mobilization of absorbed As (Jonsson & Lundell, 2004; von Bromssen et al., 2007). Recent studies (Stollenwerk et al., 2007; von Bromssen et al., 2007) indicate that groundwater from reddish sediments, within shallower depth (<150m), would be As safe. von Bromssen et al., (2007) also demonstrated a distinct correlation between the color of the aquifer sands, groundwater redox-conditions and relative risk for mobilization of geogenic As.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2010 Taylor & Francis Group, London, UK. 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: 30 Sep 2014 01:58
Last Modified: 22 Dec 2014 02:51
Uncontrolled Keywords: Holocene alluvial sediments; Meghna flood plain; Matlab Upazila; microbiology; sampling
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
06 Biological Sciences > 0605 Microbiology > 060504 Microbial Ecology
Socio-Economic Objective: D Environment > 96 Environment > 9611 Physical and Chemical Conditions of Water > 961101 Physical and Chemical Conditions of Water for Urban and Industrial Use
URI: http://eprints.usq.edu.au/id/eprint/26072

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