Título

Role of indigenous microbiota from heavily contaminated sediments in the bioprecipitation of arsenic Autor

Autor

ERIKA ELIZABETH RIOS VALENCIANA

ROBERTO BRIONES GALLARDO

Luis Felipe Cházaro Ruiz

NADIA VALENTINA MARTINEZ VILLEGAS

María de Lourdes Berenice Celis García

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Identificador alterno

doi: https://doi.org/10.1016/j.jhazmat.2017.06.019

Materias

Arsenate - (AUTOR) Bioprecipitation - (AUTOR) Sediment - (AUTOR) Sulfate - (AUTOR) Reduction - (AUTOR) INGENIERÍA Y TECNOLOGÍA - (CTI) INGENIERÍA Y TECNOLOGÍA - (CTI)

Resumen o descripción

"High arsenic concentrations have been detected in alluvial aquifers of arid and semi-arid zones in Mexico. This work describes the potential of microbial arsenate reduction of the indigenous community present in sediments from an arsenic contaminated aquifer. Microcosms assays were conducted to evaluate arsenate and sulfate-reducing activities of the native microbiota. Two different sediments were used as inoculum in the assays amended with lactate (10 mM) as electron donor and with sulfate and arsenate (10 mM each) as electron acceptors. Sediments were distinguished by their concentration of total arsenic 238.3 ± 4.1 mg/kg or 2263.1 ± 167.7 mg/kg, which may be considered as highly contaminated sediments with arsenic. Microbial communities present in both sediments were able to carry out arsenate reduction, accomplished within 4 days, with the corresponding formation of arsenite; sulfate reduction took place as well. Both reducing activities occurred without previous acclimation period or enrichment, even at potential inhibitory concentrations of arsenate as high as 750 mg/L (10 mM). The formation of a yellowish colloidal precipitate was evident when both reducing processes occurred in the microcosm, which contributed to remove between 52 and 90.9% of As(III) from the liquid phase by bioprecipitation of arsenic as arsenic sulfide."

Editor

Elsevier

Fecha de publicación

2017

Tipo de publicación

Artículo

Versión de la publicación

Versión aceptada

Recurso de información

http://ipicyt.repositorioinstitucional.mx/jspui/handle/1010/2077

Formato

application/pdf

Sugerencia de citación

Erika E. Rios-Valenciana, Roberto Briones-Gallardo, Luis F. Cházaro-Ruiz, Nadia Martínez-Villegas, Lourdes B. Celis, Role of indigenous microbiota from heavily contaminated sediments in the bioprecipitation of arsenic, Journal of Hazardous Materials, Volume 339, 2017, Pages 114-121.

Repositorio Orígen

Repositorio IPICYT

Descargas

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