Arsenic solid speciation in tailings of the abandoned Pan de Azucar mine, Northwestern Argentina

In the Argentina Puna region there are several metal sulfide mines that ceased their activity twenty years ago without a proper closure plan. The exposure of the waste rocks and tailing impoundments to weathering led to sulfide oxidation and generation of highly acid solutions rich in metal(oid)s, t...

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Detalles Bibliográficos
Autores principales: Murray, Jesica., García, María Gabriela, Borgnino, Laura, Méndez Guimaraes, Edi, Kirschbaum, Alicia Matilde
Formato: bookPart
Lenguaje:Inglés
Publicado: 2023
Materias:
Mineralogical
Arsenic
Extractions
Puna region
Acceso en línea:http://hdl.handle.net/11086/30131
Aporte de:
Repositorio Digital Universitario (UNC) de Universidad Nacional de Córdoba
id I10-R141-11086-30131
record_format dspace
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-141
collection Repositorio Digital Universitario (UNC)
language Inglés
topic Mineralogical
Arsenic
Extractions
Puna region
spellingShingle Mineralogical
Arsenic
Extractions
Puna region
Murray, Jesica.
García, María Gabriela
Borgnino, Laura
Méndez Guimaraes, Edi
Kirschbaum, Alicia Matilde
Arsenic solid speciation in tailings of the abandoned Pan de Azucar mine, Northwestern Argentina
topic_facet Mineralogical
Arsenic
Extractions
Puna region
description In the Argentina Puna region there are several metal sulfide mines that ceased their activity twenty years ago without a proper closure plan. The exposure of the waste rocks and tailing impoundments to weathering led to sulfide oxidation and generation of highly acid solutions rich in metal(oid)s, that react with the unaltered waste rocks, partitioning into different solid phases. The As speciation along a 120 cm depth oxidation profile described in the Pan de Azucar mine tailings was studied by standarized sequential extraction procedures. Results show that the highest As concentration remain in the bottom unaltered layer mainly associated with primary and secondary sulfides. In the upper layers, the total As concentrations are ?î40 to 70% lower than that of the bottom layer, and most As is associated with amorphous and cristalline oxides. More bioavailable forms of As (exchangeable and soluble) account for less than 1.5% of the total As concentration.
format bookPart
author Murray, Jesica.
García, María Gabriela
Borgnino, Laura
Méndez Guimaraes, Edi
Kirschbaum, Alicia Matilde
author_facet Murray, Jesica.
García, María Gabriela
Borgnino, Laura
Méndez Guimaraes, Edi
Kirschbaum, Alicia Matilde
author_sort Murray, Jesica.
title Arsenic solid speciation in tailings of the abandoned Pan de Azucar mine, Northwestern Argentina
title_short Arsenic solid speciation in tailings of the abandoned Pan de Azucar mine, Northwestern Argentina
title_full Arsenic solid speciation in tailings of the abandoned Pan de Azucar mine, Northwestern Argentina
title_fullStr Arsenic solid speciation in tailings of the abandoned Pan de Azucar mine, Northwestern Argentina
title_full_unstemmed Arsenic solid speciation in tailings of the abandoned Pan de Azucar mine, Northwestern Argentina
title_sort arsenic solid speciation in tailings of the abandoned pan de azucar mine, northwestern argentina
publishDate 2023
url http://hdl.handle.net/11086/30131
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