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Sources, background and enrichment of lead and other elements: Lower Guadiana River

2013Artigo científico Acesso aberto
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dc.contributor.authorBatista, M.J.
dc.contributor.authorOliveira, D.P.S.
dc.contributor.authorAbreu, Maria Manuela
dc.contributor.authorLocutura, J.
dc.contributor.authorShepherd, T.
dc.contributor.authorMatos, J.
dc.contributor.authorBel-Lan, A.
dc.contributor.authorMartins, L.
dc.date.accessioned2015-07-27T15:24:39Z
dc.date.available2015-07-27T15:24:39Z
dc.date.issued2013
dc.description.abstractThe lower sector of the Guadiana River Basin, located in southern Portugal and Spain, hosts soils and plants with elevated Pb, Cu and As near former and current mining sites. Two geogenic and two anthropogenic sources of Pb were identified where elevated concentrations are mostly related to the occurrence of sulphide-rich ore deposits, Volcanic Sedimentary formations and mining. These were generally reflected by the multiple regression analysis (MRA) and confirmed by isotope determinations. Nevertheless, caution was needed in interpreting statistical and isotopic results; therefore the combination of both techniques was important. Elements, such as Ca, Na, Cu and As, show enrichment in soil developed on shale, sandstone and conglomerate of Upper Devonian age belonging to the Phyllite-Quartzite Group. Lead exhibits an enrichment in soil developed on felsic volcanic rocks from the Volcanic Sedimentary Complex (VSC) of Upper Devonian-Lower Carboniferous age, which has been identified by the relationship between topsoil median values of different lithologies and grand subsoil median values. In the same soil, Fe, As, Co, Ni and Cr are depleted. Translocation of Pb to the aerial parts of plants is insignificant in all three plant species studied and analysed (Cistus ladanifer L., Thymus vulgaris, Lavandula luisieri). High Pb concentrations in soil, where Cistus ladanifer L. developed, the only representative number of species analysed, do not correspond generally to elevated Pb contents in plants, except near mine sites, where lower pH of soil, increases Pb bioavailability. The different statistical methodologies combined with Pb isotopic studies were successfully applied in the identification of Pb sources in soil and Cistus ladanifer L. plant of the Lower sector of Guadiana River basin. Therefore, rocks, mineralisations, subsoil, topsoil and plant processes were successfully integrated to understand the migration of Pb into the food chainpor
dc.identifier.citation"Geoderma". ISSN 0016-7061. 193-194 (2013) 265-274por
dc.identifier.doi10.1016/j.geoderma.2012.08.033
dc.identifier.urihttp://hdl.handle.net/10400.5/9079
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.subjectsourcespor
dc.subjectenrichmentpor
dc.subjectleadpor
dc.subjectGuadianapor
dc.titleSources, background and enrichment of lead and other elements: Lower Guadiana Riverpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleGeodermapor
person.familyNameAbreu
person.givenNameMaria Manuela
person.identifier.ciencia-idD113-42C0-47FE
person.identifier.orcid0000-0002-6650-1161
person.identifier.scopus-author-id15072803300
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication0170a556-8289-4061-a596-47bce69d2a0e
relation.isAuthorOfPublication.latestForDiscovery0170a556-8289-4061-a596-47bce69d2a0e

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