Arsenic in the Bengal Delta Plain: geochemical complications and potential mitigation option

Chatterjee, D. and Kundu, A. K. and Barman, S. and Biswas, U. and Majumder, S. and Chatterjee, D. and Bhattacharya, P. (2016) Arsenic in the Bengal Delta Plain: geochemical complications and potential mitigation option. In: 6th International Congress on Arsenic in the Environment: Arsenic Research and Global Sustainability (AS 2016), 19-23 June 2016, Stockholm, Sweden.


Abstract

Groundwaters from the Bengal Delta Plain (BDP) are now significantly enriched with natural arsenic (As), frequently exceeding the WHO guideline value (10 μg/L). The contaminated ground-water is often derived from geologically young sediments (Holocene), low-lying areas and flat terrain where groundwater movement is slow (poorly flushed aquifers). The As content of the aquifer material is not regularly high (3–18 mg/kg), however, the groundwater As content is often exceptionally high (up to 3200 μg/L). The most notable feature of the tubewell groundwater is their predominantly reducing conditions at near-neutral pH values (6.5–7.5) with high redox sensitive species. The issue of deeper aquifer (safe and unsafe) is most challenging in terms of both geological and public health point of view. In this context, deeper aquifer is possibly the most reliable source where remediation technologies are in many cases incapable of yielding As-safe water.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Copyright © 2016 Taylor and Francis Group, London, UK. All rights reserved. No part of this publication or the information contained herein may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, by photocopying, recording or otherwise, without written prior permission from the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Date Deposited: 25 Feb 2020 05:15
Last Modified: 02 Jul 2020 03:18
Uncontrolled Keywords: aquifers; arsenic; groundwater; groundwater resources; hydrogeology; remediation; sustainable development
Fields of Research : 04 Earth Sciences > 0406 Physical Geography and Environmental Geoscience > 040603 Hydrogeology
09 Engineering > 0904 Chemical Engineering > 090410 Water Treatment Processes
03 Chemical Sciences > 0399 Other Chemical Sciences > 039901 Environmental Chemistry (incl. Atmospheric Chemistry)
URI: http://eprints.usq.edu.au/id/eprint/36022

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