Arsenic removal from groundwater of the Chaco-Pampean Plain (Argentina) using natural geological materials as adsorbents

Bundschuh, Jochen and Bhattacharya, Prosun and Sracek, Ondra and Mellano, M. Fernanda and Ramirez, Antonio E. and Storniolo, Angelo del R. and Martin, Raul A. and Cortes, Julia and Litter, M.I. and Jean, Jiin-Shu (2011) Arsenic removal from groundwater of the Chaco-Pampean Plain (Argentina) using natural geological materials as adsorbents. Journal of Environmental Science and Health, Part A Toxic Hazardous Substances and Environmental Engineering, 46 (11). pp. 1297-1310. ISSN 1093-4529


Use of natural geological materials for arsenic (As) removal is an emerging solution at a household level for poor people in remote rural settlements, especially when the materials are locally available and can be collected by the local population. Their low or zero cost makes these materials very attractive compared with synthetic or commercial materials. Sometimes, this may be the only option to provide safe water to very poor settlements. Their suitability for As removal from water is mainly due to adsorption, co-precipitation and ion exchange processes involving Fe-and Al-rich minerals and clay minerals present in the soils or sediments. In the present study, various clay-rich soils from the Santiago del Estero province (SDE, NW Argentina) and, for comparison, a laterite from the Misiones province have been tested as adsorbents for As in shallow naturally contaminated groundwaters of the Rio Dulce alluvial aquifer in SDE. Batch adsorption experiments showed higher As(V) removal for the Misiones laterite sample (99 %) as compared with the soils from SDE (40-53 %), which can be related to lower contents of water-soluble and oxalate extractable Al and Fe in the last samples. These results suggest the application of the Misiones laterite soil as an alternative for As removal. However, high transportation costs from Misiones to SDE can be an economical restriction for the low-income population of SDE

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published Version restricted in accordance with publisher copyright policy (T&F).
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 05 Sep 2014 00:29
Last Modified: 31 Jan 2017 01:04
Uncontrolled Keywords: arsenic removal, geogenic adsorbents, clay minerals, groundwater, Chaco plain, Argentina
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090403 Chemical Engineering Design
04 Earth Sciences > 0402 Geochemistry > 040202 Inorganic Geochemistry
09 Engineering > 0904 Chemical Engineering > 090410 Water Treatment Processes
09 Engineering > 0907 Environmental Engineering > 090799 Environmental Engineering not elsewhere classified
Socio-Economic Objective: D Environment > 96 Environment > 9612 Rehabilitation of Degraded Environments > 961299 Rehabilitation of Degraded Environments not elsewhere classified
D Environment > 96 Environment > 9611 Physical and Chemical Conditions of Water > 961103 Physical and Chemical Conditions of Water in Fresh, Ground and Surface Water Environments (excl. Urban and Industrial Use)
Identification Number or DOI: 10.1080/10934529.2011.598838

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