Arsenic attenuation in aqueous phase is linked with stabilization onto Fe minerals in a high Andean watershed

E. D. Leiva, C. D.P. Ramila, I. T. Vargas, C. E. Escauriaza, C. A. Bonilla, G. E. Pizarro, P. A. Pasten, J. M. Regan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We investigated the relevance of the interaction between Fe and As in iron-rich sediments for As attenuation in surface waters of the Chilean Altiplano, under climatic conditions of extreme altitude (>4,000 masl) and aridity (<310 mm year-1). Our results show that As concentrations in aqueous phase were attenuated (>70%) due to stabilization processes in Fe-rich sediments. Total As content in Fe sediment profiles exceeds 0.9 g kg-1 and in the surface is higher than 4 g kg-1. As and Fe show perfect correlation in the Fe sediment profiles indicating a close connection between Fe minerals and As mobilization. Altogether, these results indicate that As attenuation is controlled by stabilization processes onto Fe minerals on the surface and at depth, thus controlling the discharge of As-rich runoff to the surface waters.

Original languageEnglish (US)
Title of host publicationOne Century of the Discovery of Arsenicosis in Latin America (1914-2014)
Subtitle of host publicationAs 2014 - Proceedings of the 5th International Congress on Arsenic in the Environment
PublisherCRC Press/Balkema
Pages90-92
Number of pages3
ISBN (Print)9781138001411
DOIs
StatePublished - Jan 1 2014
Event5th International Congress on Arsenic in the Environment, As 2014 - Buenos Aires, Argentina
Duration: May 11 2014May 16 2014

Publication series

NameOne Century of the Discovery of Arsenicosis in Latin America (1914-2014): As 2014 - Proceedings of the 5th International Congress on Arsenic in the Environment

Other

Other5th International Congress on Arsenic in the Environment, As 2014
CountryArgentina
CityBuenos Aires
Period5/11/145/16/14

All Science Journal Classification (ASJC) codes

  • Chemical Health and Safety

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    Leiva, E. D., Ramila, C. D. P., Vargas, I. T., Escauriaza, C. E., Bonilla, C. A., Pizarro, G. E., Pasten, P. A., & Regan, J. M. (2014). Arsenic attenuation in aqueous phase is linked with stabilization onto Fe minerals in a high Andean watershed. In One Century of the Discovery of Arsenicosis in Latin America (1914-2014): As 2014 - Proceedings of the 5th International Congress on Arsenic in the Environment (pp. 90-92). (One Century of the Discovery of Arsenicosis in Latin America (1914-2014): As 2014 - Proceedings of the 5th International Congress on Arsenic in the Environment). CRC Press/Balkema. https://doi.org/10.1201/b16767-35