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, John Ragan

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

1 Citation (Scopus)

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
StatePublished - Jan 1 2014
Event5th International Congress on Arsenic in the Environment, As 2014 - Buenos Aires, Argentina
Duration: May 11 2014May 16 2014

Other

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

Fingerprint

Arsenic
Watersheds
Minerals
Sediments
Stabilization
Surface waters
Runoff
Iron

All Science Journal Classification (ASJC) codes

  • Chemical Health and Safety

Cite this

Leiva, E. D., Ramila, C. D. P., Vargas, I. T., Escauriaza, C. E., Bonilla, C. A., Pizarro, G. E., ... Ragan, J. (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). CRC Press/Balkema.
Leiva, E. D. ; Ramila, C. D.P. ; Vargas, I. T. ; Escauriaza, C. E. ; Bonilla, C. A. ; Pizarro, G. E. ; Pasten, P. A. ; Ragan, John. / Arsenic attenuation in aqueous phase is linked with stabilization onto Fe minerals in a high Andean watershed. 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, 2014. pp. 90-92
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author = "Leiva, {E. D.} and Ramila, {C. D.P.} and Vargas, {I. T.} and Escauriaza, {C. E.} and Bonilla, {C. A.} and Pizarro, {G. E.} and Pasten, {P. A.} and John Ragan",
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Leiva, ED, Ramila, CDP, Vargas, IT, Escauriaza, CE, Bonilla, CA, Pizarro, GE, Pasten, PA & Ragan, J 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. CRC Press/Balkema, pp. 90-92, 5th International Congress on Arsenic in the Environment, As 2014, Buenos Aires, Argentina, 5/11/14.

Arsenic attenuation in aqueous phase is linked with stabilization onto Fe minerals in a high Andean watershed. / Leiva, E. D.; Ramila, C. D.P.; Vargas, I. T.; Escauriaza, C. E.; Bonilla, C. A.; Pizarro, G. E.; Pasten, P. A.; Ragan, John.

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, 2014. p. 90-92.

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

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T1 - Arsenic attenuation in aqueous phase is linked with stabilization onto Fe minerals in a high Andean watershed

AU - Leiva, E. D.

AU - Ramila, C. D.P.

AU - Vargas, I. T.

AU - Escauriaza, C. E.

AU - Bonilla, C. A.

AU - Pizarro, G. E.

AU - Pasten, P. A.

AU - Ragan, John

PY - 2014/1/1

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N2 - 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.

AB - 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.

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BT - One Century of the Discovery of Arsenicosis in Latin America (1914-2014)

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Leiva ED, Ramila CDP, Vargas IT, Escauriaza CE, Bonilla CA, Pizarro GE et al. 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. CRC Press/Balkema. 2014. p. 90-92