Show simple item record

dc.contributor.authorCruz Hernández, Pablo 
dc.contributor.authorPérez López, Rafael 
dc.contributor.authorNieto Liñán, José Miguel
dc.identifier.citationCruz Hernández, P., Pérez López, R., Nieto Liñán, J.: "Role of arsenic during the aging of Acid Mine Drainage precipitates". Procedia: Earth and Planetary Science. Vol. 17, págs. 233-236, (2017). DOI: 10.1016/j.proeps.2016.12.079en_US
dc.description.abstractIron-rich sediments cover the riverbeds affected by acid mine drainage (AMD) resulting from sulfide mineral oxidation. Precipitates are mainly composed of schwertmannite, which is a poorly-crystalline Fe-oxyhydroxysulfate that recrystallizes over a short-time period to goethite. Schwertmannite precipitation has a strong capacity for removal of some toxic elements like As. This study examines the influence of the initial As(V) concentration on the kinetics of precipitation and transformation of schwertmannite by means of batch experiments. A set of schwertmannites were synthetized with different As concentrations, and solid-solution interactions were allowed at 60°C during different time periods (from 1 h to 75 d). The increase of the initial As concentration notably the precipitation of schwertmannite and its transformation to goethite. Moreover, the transformation of schwertmannite into goethite entails the release of sulfate and, at a longer time scale, of part of the previously retained As. Thus, As acts as a retardant for schwertmannite transformation; however, this toxic element is released from the precipitates once the schwertmannite is transformed, which is per se an environmental paradox. Furthermore, schwertmannite precipitation also plays an important role in the AMD treatment systems; hence, the long-term behavior of these precipitates should be considered for the solid waste management.en_US
dc.description.sponsorshipThe Spanish Ministry of Economy and Competitiveness financed this research through the project EMPATIA (Ref. CGL2013-48460-C2-1-R). Dr. R. Perez-Lopez acknowledges the Spanish Ministry of Science and Innovation and the 'Raman y Cajal Subprogramme' (MICINN-RYC 2011). P. Cruz-Hernandez was supported by a graduate scholarship from the Spanish Ministry of Economy and Competitiveness (METODICA, CGL2010-21956-C02-02).
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherAcid Mine Drainageen_US
dc.subject.otherSchwertmannite goethiteen_US
dc.titleRole of arsenic during the aging of Acid Mine Drainage precipitatesen_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/Spanish Ministry of Economy and Competitiveness through the project EMPATIA [CGL2013-48460-C2-1-R]
dc.relation.projectIDinfo:eu-repo/grantAgreement/Spanish Ministry of Economy and Competitiveness (METODICA) [CGL2010-21956-C02-02]

Files in this item

This item appears in the following Collection(s)

Show simple item record

Atribución-NoComercial-SinDerivadas 3.0 España
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España

Copyright © 2008-2010. ARIAS MONTANO. Repositorio Institucional de la Universidad de Huelva
Contact Us | Send Feedback |