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Trace element-mineral associations in modern and ancient iron terraces in acid drainage environments

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dc.contributor.authorCruz-Hernandez, Pablo
dc.contributor.authorPérez-López, Rafael
dc.contributor.authorParviainen, Annika
dc.contributor.authorLindsay, Matthew B. J.
dc.contributor.authorNieto, José M.
dc.date.accessioned2022-10-26T21:36:18Z
dc.date.available2022-10-26T21:36:18Z
dc.date.issued2016-07-31
dc.descriptionCopyright © 2016 Elsevier B.V. All rights reserved.en_US
dc.description.abstractIron-rich sediments commonly cover riverbeds that have been affected by acid drainage associated with sulfide-mineral oxidation. Freshly-formed precipitates correspond to poorly-crystalline oxyhydroxysulfates that recrystallize over time. This study examined the distribution and mineral association of trace elements (e.g., As, Cu, Zn) in modern and ancient (~ 6 Ma) Fe terraces in the Tinto river basin, Spain. The mineral composition of the terraces was determined by Raman μ-spectroscopy. Chemical digestions, electron probe microanalyses, and synchrotron-based μ-X-ray fluorescence mapping were used to examine As, Cu, and Zn distribution and corresponding mineral associations. Fresh precipitates at modern terrace surfaces were dominated by schwertmannite, which contained high As, Cu, Mn, and Zn concentrations. However, schwertmannite transforms into goethite over days to weeks in the deeper part of the current terraces and into hematite over centuries. Affinity for trace elements was generally highest for schwertmannite and lowest for hematite, which suggests that their retention by Fe terraces decreases during mineral transformation. Hence, schwertmannite acts as temporary sink for contaminants, which are again released over long time periods. These findings should be considered for management and treatment of possible water resources affected by acid mine drainage.en_US
dc.description.sponsorshipThis research was financed by the Spanish Ministry of Economy and Competitiveness through the EMPATIA project (Ref. CGL2013-48460-C2-1-R). The work of Dr. A. Parviainen was funded by the KAUTE Foundation, Finland. Dr. R. Pérez-López acknowledges the Spanish Ministry of Science and Innovation and the ‘Ramón y Cajal Subprogramme’ (MICINN-RYC 2011). P. Cruz-Hernández was supported by a graduate scholarship from the Spanish Ministry of Economy and Competitiveness (METODICA, CGL2010-21956-C02-02). Dr. Lindsay acknowledges support from the NSERC Discovery Grants Program (Grant No. RGPIN-2014-06589). Portions of this research were performed at GeoSoilEnviroCARS (Sector 13), Advanced Photon Source (APS), Argonne National Laboratory. GeoSoilEnviroCARS is supported by the National Science Foundation - Earth Sciences (EAR-1128799) and Department of Energy - GeoSciences (DE-FG02-94ER14466). This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.en_US
dc.description.versionPeer Revieweden_US
dc.identifier.citationCruz-Hernández, P., Pérez-López, R., Parviainen, A., Lindsay, M.B.J. & Nieto, J.M. (2016). Trace element-mineral associations in modern and ancient iron terraces in acid drainage environments. Catena, 147: 386–393. https://doi.org/10.1016/j.catena.2016.07.049en_US
dc.identifier.doi10.1016/j.catena.2016.07.049
dc.identifier.urihttps://hdl.handle.net/10388/14277
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.rightsAttribution-NonCommercial-NoDerivs 2.5 Canada*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.5/ca/*
dc.subjectschwertmanniteen_US
dc.subjectgoethiteen_US
dc.subjecthematiteen_US
dc.subjectacid drainageen_US
dc.subjecttrace elements behavioren_US
dc.titleTrace element-mineral associations in modern and ancient iron terraces in acid drainage environmentsen_US
dc.typeArticleen_US

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