Occurrence, properties and pollution potential of environmental minerals in acid mine drainage
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/11625 |
Resumo: | This paper describes the occurrences, the mineralogical assemblages and the environmental relevance of the AMD-precipitates from the abandoned mine of Valdarcas, Northern Portugal. At this mining site, these precipitates are particularly related with the chemical speciation of iron, which is in according to the abundance of mine wastes enriched in pyrrhotite and pyrite. The more relevant supergene mineralogical assemblages include the following environmental minerals: soluble metal-salts, mainly sulphates, revealing seasonal behaviour, iron-hydroxysulphates and iron-oxyhydroxides, both forming ochre precipitates of poorly and well-crystalline minerals. Pollution potential of the most highly water soluble salts was analysed in order to evaluate the environmental effect of their dissolution by rainfall. Laboratory experiments, carried out with iron and aluminium sulphates, demonstrated the facility to release metals, sulphate and acidity upon dissolution. Regarding the ochre precipitates, composed by several less soluble iron (III)-minerals, the spatial distribution on the nearby aqueous system as well as the proportion of Jarosite, Schwertmannite and Goethite in the mixtures gave information about the halo’s contamination promoted by the AMD emerging from the waste-dumps |
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Occurrence, properties and pollution potential of environmental minerals in acid mine drainageAcid mine drainageEnvironmental mineralSulphate efflorescencesOchre precipitatesValdarcas (Portugal)Environmental mineralsScience & TechnologyThis paper describes the occurrences, the mineralogical assemblages and the environmental relevance of the AMD-precipitates from the abandoned mine of Valdarcas, Northern Portugal. At this mining site, these precipitates are particularly related with the chemical speciation of iron, which is in according to the abundance of mine wastes enriched in pyrrhotite and pyrite. The more relevant supergene mineralogical assemblages include the following environmental minerals: soluble metal-salts, mainly sulphates, revealing seasonal behaviour, iron-hydroxysulphates and iron-oxyhydroxides, both forming ochre precipitates of poorly and well-crystalline minerals. Pollution potential of the most highly water soluble salts was analysed in order to evaluate the environmental effect of their dissolution by rainfall. Laboratory experiments, carried out with iron and aluminium sulphates, demonstrated the facility to release metals, sulphate and acidity upon dissolution. Regarding the ochre precipitates, composed by several less soluble iron (III)-minerals, the spatial distribution on the nearby aqueous system as well as the proportion of Jarosite, Schwertmannite and Goethite in the mixtures gave information about the halo’s contamination promoted by the AMD emerging from the waste-dumpsElsevierUniversidade do MinhoValente, Teresa Maria FernandesGomes, C. Leal20092009-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/11625eng"Science of The Total Environment." ISSN 0048-9697. 407:3 (Jan. 2009) 1135-1152.0048-969710.1016/j.scitotenv.2008.09.05019004477http://www.elsevier.com/info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T11:57:45Zoai:repositorium.sdum.uminho.pt:1822/11625Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:47:25.796827Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Occurrence, properties and pollution potential of environmental minerals in acid mine drainage |
title |
Occurrence, properties and pollution potential of environmental minerals in acid mine drainage |
spellingShingle |
Occurrence, properties and pollution potential of environmental minerals in acid mine drainage Valente, Teresa Maria Fernandes Acid mine drainage Environmental mineral Sulphate efflorescences Ochre precipitates Valdarcas (Portugal) Environmental minerals Science & Technology |
title_short |
Occurrence, properties and pollution potential of environmental minerals in acid mine drainage |
title_full |
Occurrence, properties and pollution potential of environmental minerals in acid mine drainage |
title_fullStr |
Occurrence, properties and pollution potential of environmental minerals in acid mine drainage |
title_full_unstemmed |
Occurrence, properties and pollution potential of environmental minerals in acid mine drainage |
title_sort |
Occurrence, properties and pollution potential of environmental minerals in acid mine drainage |
author |
Valente, Teresa Maria Fernandes |
author_facet |
Valente, Teresa Maria Fernandes Gomes, C. Leal |
author_role |
author |
author2 |
Gomes, C. Leal |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Valente, Teresa Maria Fernandes Gomes, C. Leal |
dc.subject.por.fl_str_mv |
Acid mine drainage Environmental mineral Sulphate efflorescences Ochre precipitates Valdarcas (Portugal) Environmental minerals Science & Technology |
topic |
Acid mine drainage Environmental mineral Sulphate efflorescences Ochre precipitates Valdarcas (Portugal) Environmental minerals Science & Technology |
description |
This paper describes the occurrences, the mineralogical assemblages and the environmental relevance of the AMD-precipitates from the abandoned mine of Valdarcas, Northern Portugal. At this mining site, these precipitates are particularly related with the chemical speciation of iron, which is in according to the abundance of mine wastes enriched in pyrrhotite and pyrite. The more relevant supergene mineralogical assemblages include the following environmental minerals: soluble metal-salts, mainly sulphates, revealing seasonal behaviour, iron-hydroxysulphates and iron-oxyhydroxides, both forming ochre precipitates of poorly and well-crystalline minerals. Pollution potential of the most highly water soluble salts was analysed in order to evaluate the environmental effect of their dissolution by rainfall. Laboratory experiments, carried out with iron and aluminium sulphates, demonstrated the facility to release metals, sulphate and acidity upon dissolution. Regarding the ochre precipitates, composed by several less soluble iron (III)-minerals, the spatial distribution on the nearby aqueous system as well as the proportion of Jarosite, Schwertmannite and Goethite in the mixtures gave information about the halo’s contamination promoted by the AMD emerging from the waste-dumps |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009 2009-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/11625 |
url |
http://hdl.handle.net/1822/11625 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Science of The Total Environment." ISSN 0048-9697. 407:3 (Jan. 2009) 1135-1152. 0048-9697 10.1016/j.scitotenv.2008.09.050 19004477 http://www.elsevier.com/ |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799132232569323520 |