Speciation, mobility and adsorption effects of various metals in sediments in an agricultural area surrounding an uranium ore deposit (Nisa, Portugal)

Detalhes bibliográficos
Autor(a) principal: Santos, Ana C.
Data de Publicação: 2018
Outros Autores: Barbosa, Sofia, Pessoa, Maria Fernanda, Leal, Nuno, Reboredo, Fernando, Lidon, Fernando, Almeida, José
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://doi.org/10.9755/ejfa.2018.v30.i6.1722
Resumo: This work is a contribution to Project UID/GEO/04035/2013 funded by FCT-Fundacao para a Ciencia e a Tecnologia, in Portugal.
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spelling Speciation, mobility and adsorption effects of various metals in sediments in an agricultural area surrounding an uranium ore deposit (Nisa, Portugal)Adsorption-desorptionGeochemical availabilitySediment grain-coatingSEMSequential extractionFood ScienceApplied Microbiology and BiotechnologyAnimal Science and ZoologyAgronomy and Crop ScienceThis work is a contribution to Project UID/GEO/04035/2013 funded by FCT-Fundacao para a Ciencia e a Tecnologia, in Portugal.The availability and mobility of metals in soil strongly depend on its sediments geochemical forms and, therefore, the sediments' particles composition evaluation is more meaningful than the estimation of total soil concentrations, particularly when risk and toxicity are under evaluation. The objective of the present study is to evaluate speciation, fractionation and mobility of the considered metals in sediment samples collected in the surrounding area of a very important unexploited uranium ore deposit located in the Alto Alentejo region of Portugal (Nisa). Sequential Extraction and analytical determinations using X-ray fluorescence technique of the tested materials allowed the determination of mobile fractions and the estimation of ionic speciation. Mobility factor for different elements was estimated, with some of them presenting high mobility rates for exchangeable ions and oxide fractions. The results evidence a high geochemical availability for U, Mo, Nb, Ca, Mn, and, in some particular cases for As, V and Cr. This availability is considerably lower for other elements such as Cu, Zn, Pb, Fe, Ba and Zr. Geochemically, regarding its form of occurrence, most of these metals are incorporated in the sediment matrixes as (oxide) secondary minerals and/or included in iron-exchangeable-oxyhydroxides precipitates. By contrast, binocular microscopy observations and Scanning Electron Microscopy analysis evidenced that U, As, Nb, Mo, and (but with less evidence) V and Cr, are adsorbed in iron-oxyhydroxides-clay minerals, being present as aggregates and as coatings at the surface of primary grains. It was possible to prospect that the majority of the more mobile metals, including uranium, probably occur as oxide or in secondary forms minerals being its origin related with weathering and dissolution of primary sources and subsequent transportation by local water courses in the dissolved fractions as hydrochemical solutes or included in colloids. Later, these metals precipitated as secondary forms and/or were adsorbed preferentially at the surface of the iron-oxyhydroxides-clay minerals precipitates.DCT - Departamento de Ciências da TerraGeoBioTec - Geobiociências, Geoengenharias e GeotecnologiasRUNSantos, Ana C.Barbosa, SofiaPessoa, Maria FernandaLeal, NunoReboredo, FernandoLidon, FernandoAlmeida, José2019-02-20T23:11:08Z2018-06-012018-06-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article12application/pdfhttps://doi.org/10.9755/ejfa.2018.v30.i6.1722eng2079-052XPURE: 5794133http://www.scopus.com/inward/record.url?scp=85052058279&partnerID=8YFLogxKhttps://doi.org/10.9755/ejfa.2018.v30.i6.1722info: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:RCAAP2024-03-11T04:29:04Zoai:run.unl.pt:10362/61122Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:33:34.590961Repositório 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 Speciation, mobility and adsorption effects of various metals in sediments in an agricultural area surrounding an uranium ore deposit (Nisa, Portugal)
title Speciation, mobility and adsorption effects of various metals in sediments in an agricultural area surrounding an uranium ore deposit (Nisa, Portugal)
spellingShingle Speciation, mobility and adsorption effects of various metals in sediments in an agricultural area surrounding an uranium ore deposit (Nisa, Portugal)
Santos, Ana C.
Adsorption-desorption
Geochemical availability
Sediment grain-coating
SEM
Sequential extraction
Food Science
Applied Microbiology and Biotechnology
Animal Science and Zoology
Agronomy and Crop Science
title_short Speciation, mobility and adsorption effects of various metals in sediments in an agricultural area surrounding an uranium ore deposit (Nisa, Portugal)
title_full Speciation, mobility and adsorption effects of various metals in sediments in an agricultural area surrounding an uranium ore deposit (Nisa, Portugal)
title_fullStr Speciation, mobility and adsorption effects of various metals in sediments in an agricultural area surrounding an uranium ore deposit (Nisa, Portugal)
title_full_unstemmed Speciation, mobility and adsorption effects of various metals in sediments in an agricultural area surrounding an uranium ore deposit (Nisa, Portugal)
title_sort Speciation, mobility and adsorption effects of various metals in sediments in an agricultural area surrounding an uranium ore deposit (Nisa, Portugal)
author Santos, Ana C.
author_facet Santos, Ana C.
Barbosa, Sofia
Pessoa, Maria Fernanda
Leal, Nuno
Reboredo, Fernando
Lidon, Fernando
Almeida, José
author_role author
author2 Barbosa, Sofia
Pessoa, Maria Fernanda
Leal, Nuno
Reboredo, Fernando
Lidon, Fernando
Almeida, José
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv DCT - Departamento de Ciências da Terra
GeoBioTec - Geobiociências, Geoengenharias e Geotecnologias
RUN
dc.contributor.author.fl_str_mv Santos, Ana C.
Barbosa, Sofia
Pessoa, Maria Fernanda
Leal, Nuno
Reboredo, Fernando
Lidon, Fernando
Almeida, José
dc.subject.por.fl_str_mv Adsorption-desorption
Geochemical availability
Sediment grain-coating
SEM
Sequential extraction
Food Science
Applied Microbiology and Biotechnology
Animal Science and Zoology
Agronomy and Crop Science
topic Adsorption-desorption
Geochemical availability
Sediment grain-coating
SEM
Sequential extraction
Food Science
Applied Microbiology and Biotechnology
Animal Science and Zoology
Agronomy and Crop Science
description This work is a contribution to Project UID/GEO/04035/2013 funded by FCT-Fundacao para a Ciencia e a Tecnologia, in Portugal.
publishDate 2018
dc.date.none.fl_str_mv 2018-06-01
2018-06-01T00:00:00Z
2019-02-20T23:11:08Z
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 https://doi.org/10.9755/ejfa.2018.v30.i6.1722
url https://doi.org/10.9755/ejfa.2018.v30.i6.1722
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2079-052X
PURE: 5794133
http://www.scopus.com/inward/record.url?scp=85052058279&partnerID=8YFLogxK
https://doi.org/10.9755/ejfa.2018.v30.i6.1722
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 12
application/pdf
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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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