Release and mobility of hexavalent chromium in contaminated soil with chemical factory waste: Experiments, Cr isotope analysis and reactive transport modeling
Our study focused on the leaching processes in soil contaminated with hexavalent chromium (Cr(VI)), traced to industrial waste from a disused site and resulting in groundwater contamination. Mineral and geochemical characterization of the soil by means of XRD, SEM-EDS, total digestion and sequential extractions revealed that the main Cr content was from solid waste located in the upper meter of the soil profile. Flow-through and column experiments were carried out to investigate the processes responsible for Cr(VI) release. Cr(VI) mobility along the soil profile was also assessed. Moreover, Cr isotope signatures were used to evaluate a potential Cr(VI) reduction process, which preferably could immobilize toxic Cr(VI) complexes. One-dimensional (1D) numerical simulations reproduced the Cr(VI) release from the flow-through experiment containing the Cr(VI) rich-solid waste and also the Cr(VI) mobility along the column experiment. These results enabled us to interpret quantitatively the processes resulting in Cr(VI) contamination and mobility along the soil profile. Cr(VI) was released from dissolving Cr(VI)-rich phases (e.g., sodium chromate, Cr(VI)-hydrocalumite and Cr(VI)-ettringite) of the solid waste layer. Cr(VI) reduction and Cr(VI) adsorption did not take place along the column. Such accurate characterization of these processes is necessary for the mitigation of Cr(VI) mobility in contaminated soils.
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Language: | English |
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Elsevier
2023-06-05
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Subjects: | Soil, Contamination, Hexavalent chromium, Reactive transport modeling, |
Online Access: | http://hdl.handle.net/10261/304514 http://dx.doi.org/10.13039/501100004837 https://api.elsevier.com/content/abstract/scopus_id/85150073994 |
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dig-idaea-es-10261-3045142024-05-14T20:39:06Z Release and mobility of hexavalent chromium in contaminated soil with chemical factory waste: Experiments, Cr isotope analysis and reactive transport modeling Ceballos, Elina Cama, Jordi Soler, Josep M. Frei, Robert Ministerio de Ciencia e Innovación (España) 0000-0001-6623-8116 0000-0003-0741-249X 0000-0001-7708-9881 Soil Contamination Hexavalent chromium Reactive transport modeling Our study focused on the leaching processes in soil contaminated with hexavalent chromium (Cr(VI)), traced to industrial waste from a disused site and resulting in groundwater contamination. Mineral and geochemical characterization of the soil by means of XRD, SEM-EDS, total digestion and sequential extractions revealed that the main Cr content was from solid waste located in the upper meter of the soil profile. Flow-through and column experiments were carried out to investigate the processes responsible for Cr(VI) release. Cr(VI) mobility along the soil profile was also assessed. Moreover, Cr isotope signatures were used to evaluate a potential Cr(VI) reduction process, which preferably could immobilize toxic Cr(VI) complexes. One-dimensional (1D) numerical simulations reproduced the Cr(VI) release from the flow-through experiment containing the Cr(VI) rich-solid waste and also the Cr(VI) mobility along the column experiment. These results enabled us to interpret quantitatively the processes resulting in Cr(VI) contamination and mobility along the soil profile. Cr(VI) was released from dissolving Cr(VI)-rich phases (e.g., sodium chromate, Cr(VI)-hydrocalumite and Cr(VI)-ettringite) of the solid waste layer. Cr(VI) reduction and Cr(VI) adsorption did not take place along the column. Such accurate characterization of these processes is necessary for the mitigation of Cr(VI) mobility in contaminated soils. This research was funded by project PICT 2013–2422 (Ministerio de Ciencia, Tecnología e Innovación, MINCYT, Argentina) and project 2021 SGR 00308 (Catalan Government). IDAEA-CSIC is a Centre of Excellence Severo Ochoa (Spanish Ministry of Science and Innovation, Project CEX2018–000794-S funded by MCIN/AEI/10.13039/501100011033). We would like to thank Jordi Bellés and Natàlia Moreno (IDAEA), David Artiga and Maite Romero (SCT-University of Barcelona) for analytical assistance. The authors would like to thank the thoughtful reviews by two anonymous reviewers. Peer reviewed 2023-03-28T08:46:43Z 2023-03-28T08:46:43Z 2023-06-05 artículo http://purl.org/coar/resource_type/c_6501 Journal of Hazardous Materials 451: 131193 (2023) 03043894 http://hdl.handle.net/10261/304514 10.1016/j.jhazmat.2023.131193 http://dx.doi.org/10.13039/501100004837 36931219 2-s2.0-85150073994 https://api.elsevier.com/content/abstract/scopus_id/85150073994 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MCIN/AEI/10.13039/501100011033 Journal of hazardous materials Postprint https://doi.org/10.1016/j.jhazmat.2023.131193 Sí embargo_20250605 Elsevier |
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Soil Contamination Hexavalent chromium Reactive transport modeling Soil Contamination Hexavalent chromium Reactive transport modeling Ceballos, Elina Cama, Jordi Soler, Josep M. Frei, Robert Release and mobility of hexavalent chromium in contaminated soil with chemical factory waste: Experiments, Cr isotope analysis and reactive transport modeling |
description |
Our study focused on the leaching processes in soil contaminated with hexavalent chromium (Cr(VI)), traced to industrial waste from a disused site and resulting in groundwater contamination. Mineral and geochemical characterization of the soil by means of XRD, SEM-EDS, total digestion and sequential extractions revealed that the main Cr content was from solid waste located in the upper meter of the soil profile. Flow-through and column experiments were carried out to investigate the processes responsible for Cr(VI) release. Cr(VI) mobility along the soil profile was also assessed. Moreover, Cr isotope signatures were used to evaluate a potential Cr(VI) reduction process, which preferably could immobilize toxic Cr(VI) complexes. One-dimensional (1D) numerical simulations reproduced the Cr(VI) release from the flow-through experiment containing the Cr(VI) rich-solid waste and also the Cr(VI) mobility along the column experiment. These results enabled us to interpret quantitatively the processes resulting in Cr(VI) contamination and mobility along the soil profile. Cr(VI) was released from dissolving Cr(VI)-rich phases (e.g., sodium chromate, Cr(VI)-hydrocalumite and Cr(VI)-ettringite) of the solid waste layer. Cr(VI) reduction and Cr(VI) adsorption did not take place along the column. Such accurate characterization of these processes is necessary for the mitigation of Cr(VI) mobility in contaminated soils. |
author2 |
Ministerio de Ciencia e Innovación (España) |
author_facet |
Ministerio de Ciencia e Innovación (España) Ceballos, Elina Cama, Jordi Soler, Josep M. Frei, Robert |
format |
artículo |
topic_facet |
Soil Contamination Hexavalent chromium Reactive transport modeling |
author |
Ceballos, Elina Cama, Jordi Soler, Josep M. Frei, Robert |
author_sort |
Ceballos, Elina |
title |
Release and mobility of hexavalent chromium in contaminated soil with chemical factory waste: Experiments, Cr isotope analysis and reactive transport modeling |
title_short |
Release and mobility of hexavalent chromium in contaminated soil with chemical factory waste: Experiments, Cr isotope analysis and reactive transport modeling |
title_full |
Release and mobility of hexavalent chromium in contaminated soil with chemical factory waste: Experiments, Cr isotope analysis and reactive transport modeling |
title_fullStr |
Release and mobility of hexavalent chromium in contaminated soil with chemical factory waste: Experiments, Cr isotope analysis and reactive transport modeling |
title_full_unstemmed |
Release and mobility of hexavalent chromium in contaminated soil with chemical factory waste: Experiments, Cr isotope analysis and reactive transport modeling |
title_sort |
release and mobility of hexavalent chromium in contaminated soil with chemical factory waste: experiments, cr isotope analysis and reactive transport modeling |
publisher |
Elsevier |
publishDate |
2023-06-05 |
url |
http://hdl.handle.net/10261/304514 http://dx.doi.org/10.13039/501100004837 https://api.elsevier.com/content/abstract/scopus_id/85150073994 |
work_keys_str_mv |
AT ceballoselina releaseandmobilityofhexavalentchromiumincontaminatedsoilwithchemicalfactorywasteexperimentscrisotopeanalysisandreactivetransportmodeling AT camajordi releaseandmobilityofhexavalentchromiumincontaminatedsoilwithchemicalfactorywasteexperimentscrisotopeanalysisandreactivetransportmodeling AT solerjosepm releaseandmobilityofhexavalentchromiumincontaminatedsoilwithchemicalfactorywasteexperimentscrisotopeanalysisandreactivetransportmodeling AT freirobert releaseandmobilityofhexavalentchromiumincontaminatedsoilwithchemicalfactorywasteexperimentscrisotopeanalysisandreactivetransportmodeling |
_version_ |
1802820379291418624 |