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 (2012) Co-occurrence of arsenic and fluoride in groundwater of semi-arid regions in Latin America: genesis, mobility and remediation. Journal of Hazardous Materials . ISSN 0304-3894 (In Press)
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Identification Number or DOI: doi: 10.1016/j.jhazmat.2012.08.005
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.
|Item Type:||Article (Commonwealth Reporting Category C)|
|Additional Information:||Published online 10 August 2012. Permanent restricted access to ArticleFirst version in accordance with the copyright policy of the publisher.|
|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|
|Deposited On:||29 Aug 2012 11:19|
|Last Modified:||03 May 2013 11:24|
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