Geochemical processes for mobilization of arsenic in groundwater

Herath, I. and Bundschuh, J. and Vithanage, M. and Bhattacharya, P. (2016) Geochemical processes for mobilization of arsenic in groundwater. In: 6th International Congress on Arsenic in the Environment: Arsenic Research and Global Sustainability (AS 2016), 19-23 June 2016, Stockholm, Sweden.


Abstract

This paper presents an overview of natural geochemical processes that can mobilize arsenic (As) from aquifer sediments into groundwater. The primary source of As in groundwater is pre-dominantly natural (geogenic), and can be mobilized via complicated biogeochemical interactions within various aquifer solids and water. Oxidation of sulfide minerals such as arsenopyrite, As-substituted pyrite and other sulfide minerals are susceptible to oxidation in near surface environment, and release significant quantities of As from sediments. Reductive dissolution of As-bearing Fe(III) oxides/hydroxides 2and sulfide oxidation are the most common and significant geochemical triggers that tend to release As from aquifer sediments into groundwater. Hence, strengthening direct action and implementation of the best practices to target the safe groundwater sources for installing safe drinking water wells are an urgent necessity for sustainable As mitigation on a global scale.


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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 02:31
Last Modified: 02 Jul 2020 03:20
Uncontrolled Keywords: aquifers; arsenic; geochemistry; groundwater; groundwater resources; oxidation; potable water; sediments; sulfur compounds; sustainable development; water wells; aquifer sediments; arsenic in groundwater; biogeochemical interactions; geochemical process; groundwater sources; oxidation of sulfides; reductive dissolution; safe drinking water; hydrochemistry
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090410 Water Treatment Processes
04 Earth Sciences > 0406 Physical Geography and Environmental Geoscience > 040603 Hydrogeology
03 Chemical Sciences > 0399 Other Chemical Sciences > 039901 Environmental Chemistry (incl. Atmospheric Chemistry)
URI: http://eprints.usq.edu.au/id/eprint/36026

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