Co-occurrence of arsenic and fluoride in groundwater of semi-arid regions in Latin America: genesis, mobility and remediation

Alarcon-Herrera, Maria Teresa and Bundschuh, Jochen and Nath, Bibhash and Nicolli, Hugo B. and Gutierrez, Melida and Reyes-Gomez, Victor M. and Nunez, Daniel and Martin-Dominguez, Ignacio R. and Sracek, Ondra (2013) Co-occurrence of arsenic and fluoride in groundwater of semi-arid regions in Latin America: genesis, mobility and remediation. Journal of Hazardous Materials, 262. pp. 960-969. ISSN 0304-3894

Abstract

Several million people around the world are currently exposed to excessive amounts of arsenic (As) and fluoride (F) in their drinking water. Although the individual toxic effects of As and F have been analyzed, there are few studies addressing their co-occurrences and water treatment options. Several studies conducted in arid and semi-arid regions of Latin America show that the co-occurrences of As and F in drinking water are linked to the volcaniclastic particles in the loess or alluvium, alkaline pH, and limited recharge. The As and F contamination results from water–rock interactions and may be accelerated by geothermal and mining activities, as well as by aquifer over-exploitation. These types of contamination are particularly pronounced in arid and semi-arid regions, where high As concentrations often show a direct relationship with high F concentrations. Enrichment of F is generally related to fluorite dissolution and it is also associated with high Cl, Br, and V concentrations. The methods of As and F removal, such as chemical precipitation followed by filtration and reverse osmosis, are currently being used at different scales and scenarios in Latin America. Although such technologies are available in Latin America, it is still urgent to develop technologies and methods capable of monitoring and removing both of these contaminants simultaneously from drinking water, with a particular focus towards small-scale rural operations.


Statistics for USQ ePrint 21698
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2012 Elsevier B.V. All rights reserved. Published online 10 August 2012. Permanent restricted access to published version in accordance with the copyright policy of the publisher.
Depositing User: epEditor USQ
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 29 Aug 2012 01:19
Last Modified: 14 Oct 2014 22:50
Uncontrolled Keywords: arsenic; fluoride; Latin America; groundwater; drinking water; removal technology
Fields of Research (FOR2008): 10 Technology > 1002 Environmental Biotechnology > 100203 Bioremediation
04 Earth Sciences > 0406 Physical Geography and Environmental Geoscience > 040603 Hydrogeology
09 Engineering > 0904 Chemical Engineering > 090410 Water Treatment Processes
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9612 Rehabilitation of Degraded Environments > 961204 Rehabilitation of Degraded Fresh, Ground and Surface Water Environments
Identification Number or DOI: 10.1016/j.jhazmat.2012.08.005
URI: http://eprints.usq.edu.au/id/eprint/21698

Actions (login required)

View Item Archive Repository Staff Only