Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.

Autores
Nieva, Nancy Eugenia; Borgnino Bianchi, Laura Carolina; Locati, Francisco; Garcia, Maria Gabriela
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The sulfide-rich residues of La Concordia mine, Argentina Puna, are accumulated in tailing dams that remainedexposed to the weathering agents for almost 30 years. In such period of time, a complex sequence of redoxand dissolution/precipitation reactions occurred, leading to the gradual oxidation of the wastes and the formationof weathering profiles. The sources of arsenic in the wastes were analyzed by XRD and SEM/EDS analysiswhile a standardized sequential extraction procedure was followed to define solid As associations. In addition,the release of As during sediment?water interaction was analyzed in a period of 10 months. The results indicatethat primary As-bearing minerals are arsenian pyrite and polymetallic sulfides. As-jarosite and scarce arsenatesare the only secondary As-bearing minerals identified by XRD and SEM/EDS. However, the rapid release(i.e., b1 h) of arsenic from suspensions of the studied sediments in water, seems to be associated to the dissolutionof highly soluble (hydrous)sulfates, as it was determined in samples of the efflorescences that cover the entiresite. Contributions from the more abundant As-jarosite are also expected in longer periods of sediment?water interaction, due to its low rate of dissolution in acid and oxic conditions. Finally, near 30% of As remains adsorbed onto Fe (hydr)oxides thus representing a hazardous reservoir with the potential of mobilizing As intoporewaters and streamwaters if the acidic and oxidizing conditions that predominate in the region are altered.
Fil: Nieva, Nancy Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Borgnino Bianchi, Laura Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Locati, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Garcia, Maria Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Materia
Concordia Mine
Central Andes
As-Jarosite
Scorodite
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/44220
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/44220
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.Nieva, Nancy EugeniaBorgnino Bianchi, Laura CarolinaLocati, FranciscoGarcia, Maria GabrielaConcordia MineCentral AndesAs-JarositeScoroditehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The sulfide-rich residues of La Concordia mine, Argentina Puna, are accumulated in tailing dams that remainedexposed to the weathering agents for almost 30 years. In such period of time, a complex sequence of redoxand dissolution/precipitation reactions occurred, leading to the gradual oxidation of the wastes and the formationof weathering profiles. The sources of arsenic in the wastes were analyzed by XRD and SEM/EDS analysiswhile a standardized sequential extraction procedure was followed to define solid As associations. In addition,the release of As during sediment?water interaction was analyzed in a period of 10 months. The results indicatethat primary As-bearing minerals are arsenian pyrite and polymetallic sulfides. As-jarosite and scarce arsenatesare the only secondary As-bearing minerals identified by XRD and SEM/EDS. However, the rapid release(i.e., b1 h) of arsenic from suspensions of the studied sediments in water, seems to be associated to the dissolutionof highly soluble (hydrous)sulfates, as it was determined in samples of the efflorescences that cover the entiresite. Contributions from the more abundant As-jarosite are also expected in longer periods of sediment?water interaction, due to its low rate of dissolution in acid and oxic conditions. Finally, near 30% of As remains adsorbed onto Fe (hydr)oxides thus representing a hazardous reservoir with the potential of mobilizing As intoporewaters and streamwaters if the acidic and oxidizing conditions that predominate in the region are altered.Fil: Nieva, Nancy Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Borgnino Bianchi, Laura Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Locati, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Garcia, Maria Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaElsevier Science2016-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/44220Nieva, Nancy Eugenia; Borgnino Bianchi, Laura Carolina; Locati, Francisco; Garcia, Maria Gabriela; Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.; Elsevier Science; The Science Of Total Environment; 550; 4-2016; 1141-11510048-9697CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0048969716301462?via%3Dihubinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2016.01.147info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:24:30Zoai:ri.conicet.gov.ar:11336/44220instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:24:30.876CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.
title Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.
spellingShingle Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.
Nieva, Nancy Eugenia
Concordia Mine
Central Andes
As-Jarosite
Scorodite
title_short Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.
title_full Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.
title_fullStr Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.
title_full_unstemmed Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.
title_sort Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.
dc.creator.none.fl_str_mv Nieva, Nancy Eugenia
Borgnino Bianchi, Laura Carolina
Locati, Francisco
Garcia, Maria Gabriela
author Nieva, Nancy Eugenia
author_facet Nieva, Nancy Eugenia
Borgnino Bianchi, Laura Carolina
Locati, Francisco
Garcia, Maria Gabriela
author_role author
author2 Borgnino Bianchi, Laura Carolina
Locati, Francisco
Garcia, Maria Gabriela
author2_role author
author
author
dc.subject.none.fl_str_mv Concordia Mine
Central Andes
As-Jarosite
Scorodite
topic Concordia Mine
Central Andes
As-Jarosite
Scorodite
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The sulfide-rich residues of La Concordia mine, Argentina Puna, are accumulated in tailing dams that remainedexposed to the weathering agents for almost 30 years. In such period of time, a complex sequence of redoxand dissolution/precipitation reactions occurred, leading to the gradual oxidation of the wastes and the formationof weathering profiles. The sources of arsenic in the wastes were analyzed by XRD and SEM/EDS analysiswhile a standardized sequential extraction procedure was followed to define solid As associations. In addition,the release of As during sediment?water interaction was analyzed in a period of 10 months. The results indicatethat primary As-bearing minerals are arsenian pyrite and polymetallic sulfides. As-jarosite and scarce arsenatesare the only secondary As-bearing minerals identified by XRD and SEM/EDS. However, the rapid release(i.e., b1 h) of arsenic from suspensions of the studied sediments in water, seems to be associated to the dissolutionof highly soluble (hydrous)sulfates, as it was determined in samples of the efflorescences that cover the entiresite. Contributions from the more abundant As-jarosite are also expected in longer periods of sediment?water interaction, due to its low rate of dissolution in acid and oxic conditions. Finally, near 30% of As remains adsorbed onto Fe (hydr)oxides thus representing a hazardous reservoir with the potential of mobilizing As intoporewaters and streamwaters if the acidic and oxidizing conditions that predominate in the region are altered.
Fil: Nieva, Nancy Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Borgnino Bianchi, Laura Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Locati, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Garcia, Maria Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
description The sulfide-rich residues of La Concordia mine, Argentina Puna, are accumulated in tailing dams that remainedexposed to the weathering agents for almost 30 years. In such period of time, a complex sequence of redoxand dissolution/precipitation reactions occurred, leading to the gradual oxidation of the wastes and the formationof weathering profiles. The sources of arsenic in the wastes were analyzed by XRD and SEM/EDS analysiswhile a standardized sequential extraction procedure was followed to define solid As associations. In addition,the release of As during sediment?water interaction was analyzed in a period of 10 months. The results indicatethat primary As-bearing minerals are arsenian pyrite and polymetallic sulfides. As-jarosite and scarce arsenatesare the only secondary As-bearing minerals identified by XRD and SEM/EDS. However, the rapid release(i.e., b1 h) of arsenic from suspensions of the studied sediments in water, seems to be associated to the dissolutionof highly soluble (hydrous)sulfates, as it was determined in samples of the efflorescences that cover the entiresite. Contributions from the more abundant As-jarosite are also expected in longer periods of sediment?water interaction, due to its low rate of dissolution in acid and oxic conditions. Finally, near 30% of As remains adsorbed onto Fe (hydr)oxides thus representing a hazardous reservoir with the potential of mobilizing As intoporewaters and streamwaters if the acidic and oxidizing conditions that predominate in the region are altered.
publishDate 2016
dc.date.none.fl_str_mv 2016-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/44220
Nieva, Nancy Eugenia; Borgnino Bianchi, Laura Carolina; Locati, Francisco; Garcia, Maria Gabriela; Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.; Elsevier Science; The Science Of Total Environment; 550; 4-2016; 1141-1151
0048-9697
CONICET Digital
CONICET
url http://hdl.handle.net/11336/44220
identifier_str_mv Nieva, Nancy Eugenia; Borgnino Bianchi, Laura Carolina; Locati, Francisco; Garcia, Maria Gabriela; Mineralogical control on arsenic release during sediment water interaction in abandoned mine wastes from the Argentina Puna.; Elsevier Science; The Science Of Total Environment; 550; 4-2016; 1141-1151
0048-9697
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0048969716301462?via%3Dihub
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2016.01.147
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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