Chemistry of volcanic soils used for agriculture in Brava Island (Cape Verde) envisaging a sustainable management
Autor(a) principal: | |
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Data de Publicação: | 2018 |
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/10773/36919 |
Resumo: | In order to acquire a better knowledge of iron forms, clay minerals and the content and distribution of trace elements in soils mostly used for agriculture in the semi-arid Brava Island (Cape Verde), iron speciation, mineralogy and chemical contents in the clay-size fraction (<2 μm) of incipient soils developed on sediments and phonolitic pyroclasts was performed by Mössbauer spectroscopy, X-ray diffraction and neutron activation analysis. In contrast with the whole samples in the clay-size fraction of all the studied soils only Fe(III) was detected. Iron and chromium are depleted suggesting their occurrence as ferromagnesian and oxide minerals present in coarser particles. Rare earth elements are concentrated in the clay-size fraction, and significant differences are found in their distribution which may be partially due to oxidation, since Ce anomalies were observed. Among the other chemical elements studied, high concentrations of arsenic, bromine, and particularly antimony were found in the clay-size fraction of soils where all the Fe oxides are nano-sized, confirming the predominant adsorption of these elements on the nano-particles surface. The existence of significant amounts of these elements as well as of vitreous phases in fine particles of these soils may contribute to their mobility and accumulation in groundwater and in plants, both by absorption and by dust deposition onto the plant leaves. |
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Chemistry of volcanic soils used for agriculture in Brava Island (Cape Verde) envisaging a sustainable managementBrava IslandCape VerdeVolcanic soilREETrace elementsIron speciationIn order to acquire a better knowledge of iron forms, clay minerals and the content and distribution of trace elements in soils mostly used for agriculture in the semi-arid Brava Island (Cape Verde), iron speciation, mineralogy and chemical contents in the clay-size fraction (<2 μm) of incipient soils developed on sediments and phonolitic pyroclasts was performed by Mössbauer spectroscopy, X-ray diffraction and neutron activation analysis. In contrast with the whole samples in the clay-size fraction of all the studied soils only Fe(III) was detected. Iron and chromium are depleted suggesting their occurrence as ferromagnesian and oxide minerals present in coarser particles. Rare earth elements are concentrated in the clay-size fraction, and significant differences are found in their distribution which may be partially due to oxidation, since Ce anomalies were observed. Among the other chemical elements studied, high concentrations of arsenic, bromine, and particularly antimony were found in the clay-size fraction of soils where all the Fe oxides are nano-sized, confirming the predominant adsorption of these elements on the nano-particles surface. The existence of significant amounts of these elements as well as of vitreous phases in fine particles of these soils may contribute to their mobility and accumulation in groundwater and in plants, both by absorption and by dust deposition onto the plant leaves.Elsevier2023-04-06T15:32:17Z2018-11-01T00:00:00Z2018-11info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/36919eng1464-343X10.1016/j.jafrearsci.2018.06.014Marques, RosaVieira, Bruno J.Prudêncio, M. IsabelWaerenborgh, João C.Dias, M. IsabelRocha, Fernandoinfo: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:RCAAP2024-02-22T12:11:12Zoai:ria.ua.pt:10773/36919Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:07:35.223751Repositório 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 |
Chemistry of volcanic soils used for agriculture in Brava Island (Cape Verde) envisaging a sustainable management |
title |
Chemistry of volcanic soils used for agriculture in Brava Island (Cape Verde) envisaging a sustainable management |
spellingShingle |
Chemistry of volcanic soils used for agriculture in Brava Island (Cape Verde) envisaging a sustainable management Marques, Rosa Brava Island Cape Verde Volcanic soil REE Trace elements Iron speciation |
title_short |
Chemistry of volcanic soils used for agriculture in Brava Island (Cape Verde) envisaging a sustainable management |
title_full |
Chemistry of volcanic soils used for agriculture in Brava Island (Cape Verde) envisaging a sustainable management |
title_fullStr |
Chemistry of volcanic soils used for agriculture in Brava Island (Cape Verde) envisaging a sustainable management |
title_full_unstemmed |
Chemistry of volcanic soils used for agriculture in Brava Island (Cape Verde) envisaging a sustainable management |
title_sort |
Chemistry of volcanic soils used for agriculture in Brava Island (Cape Verde) envisaging a sustainable management |
author |
Marques, Rosa |
author_facet |
Marques, Rosa Vieira, Bruno J. Prudêncio, M. Isabel Waerenborgh, João C. Dias, M. Isabel Rocha, Fernando |
author_role |
author |
author2 |
Vieira, Bruno J. Prudêncio, M. Isabel Waerenborgh, João C. Dias, M. Isabel Rocha, Fernando |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Marques, Rosa Vieira, Bruno J. Prudêncio, M. Isabel Waerenborgh, João C. Dias, M. Isabel Rocha, Fernando |
dc.subject.por.fl_str_mv |
Brava Island Cape Verde Volcanic soil REE Trace elements Iron speciation |
topic |
Brava Island Cape Verde Volcanic soil REE Trace elements Iron speciation |
description |
In order to acquire a better knowledge of iron forms, clay minerals and the content and distribution of trace elements in soils mostly used for agriculture in the semi-arid Brava Island (Cape Verde), iron speciation, mineralogy and chemical contents in the clay-size fraction (<2 μm) of incipient soils developed on sediments and phonolitic pyroclasts was performed by Mössbauer spectroscopy, X-ray diffraction and neutron activation analysis. In contrast with the whole samples in the clay-size fraction of all the studied soils only Fe(III) was detected. Iron and chromium are depleted suggesting their occurrence as ferromagnesian and oxide minerals present in coarser particles. Rare earth elements are concentrated in the clay-size fraction, and significant differences are found in their distribution which may be partially due to oxidation, since Ce anomalies were observed. Among the other chemical elements studied, high concentrations of arsenic, bromine, and particularly antimony were found in the clay-size fraction of soils where all the Fe oxides are nano-sized, confirming the predominant adsorption of these elements on the nano-particles surface. The existence of significant amounts of these elements as well as of vitreous phases in fine particles of these soils may contribute to their mobility and accumulation in groundwater and in plants, both by absorption and by dust deposition onto the plant leaves. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-01T00:00:00Z 2018-11 2023-04-06T15:32:17Z |
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/10773/36919 |
url |
http://hdl.handle.net/10773/36919 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1464-343X 10.1016/j.jafrearsci.2018.06.014 |
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 |
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 |
repository.mail.fl_str_mv |
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1799137730491318272 |