| dc.contributor.author | Serrano, Jennyfer [Univ Mayor, Escuela Biotecnol] | es_CL |
| dc.contributor.author | Leiva, Eduardo | es_CL |
| dc.contributor.author | Leiva-Aravena, Enzo | es_CL |
| dc.contributor.author | Rodríguez, Carolina | es_CL |
| dc.contributor.author | Vargas, Ignacio | es_CL |
| dc.date.accessioned | 2020-04-08T14:11:55Z | |
| dc.date.accessioned | 2020-04-13T18:12:35Z | |
| dc.date.available | 2020-04-08T14:11:55Z | |
| dc.date.available | 2020-04-13T18:12:35Z | |
| dc.date.issued | 2018 | es_CL |
| dc.identifier.citation | Leiva, E., Leiva-Aravena, E., Rodríguez, C., Serrano, J., & Vargas, I. (2018). Arsenic removal mediated by acidic pH neutralization and iron precipitation in microbial fuel cells. Science of the Total Environment, 645, 471-481. | es_CL |
| dc.identifier.issn | 0048-9697 | es_CL |
| dc.identifier.issn | 1879-1026 | es_CL |
| dc.identifier.uri | https://doi.org/10.1016/j.scitotenv.2018.06.378 | es_CL |
| dc.identifier.uri | http://repositorio.umayor.cl/xmlui/handle/sibum/6102 | |
| dc.description.abstract | High concentrations of arsenic (As) in natural waters are a growing concern worldwide. In northern Chile, fluvial systems enriched in As from natural and anthropogenic sources have been found to contain microbial communities with exoelectrogenic activity. Previous work performed with Microbial Fuel Cells (MFCs) resulted in a neutralizing microbial community developed from a consortium extracted from northern Chile. Considering that the formation of iron minerals, which have been reported as good As sorbents, would be favored by pH neutralization, the use of neutralizing MFCs could result in a sustainable alternative for Fe and As removal. In this work, we quantified the removal of As and Fe from acidic waters in air-cathode single-chamber MFCs. Our results show a removal similar to 80% of As and Fe and, simultaneously, a pH neutralization from similar to 3.7 to similar to 7.2. Additionally, non-MFC experiments indicate that the removal of As and Fe is dependent only on the activity of the microbial community developed during MFC operation and not on the MFC electrochemical performance. In addition, scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) analysis showed spatial associations between Fe and As on the surface of cathodes, suggesting the idea that iron oxyhydroxides formation would be associated with the higher oxygen concentration near the cathodes. Powder X-ray diffraction (XRD) analysis showed the dominance of iron amorphous minerals, which may be favoring the removal of As. These results indicate that acid/metal-tolerant bacteria favor pH neutralization and consequently the removal of Fe and As by processes of surface sorption and/or As-Fe co-precipitation. Furthermore, these findings expand the possible MFC applications to the simultaneous removal of Fe and As from acidic waters, enabling its use as an energetically sustainable bioremediation alternative. (C) 2018 Published by Elsevier B.V. | es_CL |
| dc.description.sponsorship | PIA-UC Eduardo Leiva/DDA-VRA; FONDECYTComision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)CONICYT FONDECYT [3140515, 1160917]; CEDEUS [CONICYT/FONDAP/15110020] | es_CL |
| dc.description.sponsorship | This research was funded by PIA-UC Eduardo Leiva/DDA-VRA, FONDECYT project 3140515, FONDECYT project 1160917 and CEDEUS (CONICYT/FONDAP/15110020). We thanks to Javiera Anguita and Cristobal Alvear for their help in Fe-As-rich sediments sampling during field campaign. Thanks are also extended to the reviewers for the corrections and suggestions, which contributed significantly to improve the manuscript. | es_CL |
| dc.language.iso | en | es_CL |
| dc.publisher | ELSEVIER SCIENCE BV | es_CL |
| dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Chile | |
| dc.source | Sci. Total Environ., DIC 2018. 645: p. 471-481 | |
| dc.subject | Environmental Sciences | es_CL |
| dc.title | Arsenic removal mediated by acidic pH neutralization and iron precipitation in microbial fuel cells | es_CL |
| dc.type | Artículo | es_CL |
| umayor.facultad | CIENCIAS | es_CL |
| umayor.politicas.sherpa/romeo | RoMEO green journal (Se puede archivar el pre-print y el post-print o versión de editor/PDF). Disponible en: http://sherpa.ac.uk/romeo/index.php | es_CL |
| umayor.indexado | WOS:000445164200046 | es_CL |
| umayor.indexado | PMID: 30029122 | es_CL |
| dc.identifier.doi | DOI: 10.1016/j.scitotenv.2018.06.378 | es_CL] |
| umayor.indicadores.wos-(cuartil) | Q1 | es_CL |
| umayor.indicadores.scopus-(scimago-sjr) | SCIMAGO/ INDICE H: 205 H | es_CL |