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dc.rights.licenseAtribución-NoComercial 4.0 Internacional
dc.contributor.authorOlu-Owolabi, Bamidele I.
dc.contributor.authorAgunbiade, Foluso O.
dc.contributor.authorAdebowale, Kayode O.
dc.date.accessioned2019-06-28T12:56:01Z
dc.date.available2019-06-28T12:56:01Z
dc.date.issued2013
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/44087
dc.description.abstractInformation obtainable from metal speciation is far more valuable with respect to bioavailability, toxicity and fate of metals than information from total metal data. Therefore, metal speciation on sediment to assess the bioavailability, fate and mobility of As, Cd, Cr, Fe, Mn, Ni, Pb, and V in the crude oil prospecting area of Ondo state Nigeria was carried out in this study.  Five operationally defined metals species: exchangeable specie, carbonate bound specie, iron/manganese bound specie, organic bound specie and the residual specie were obtained using sequential extraction method.  The concentrations, spreads and relative abundances of the species were used to assess their fate, mobility and toxicity potential.  The crude oil exploration site and the mouth of the estuary had the highest concentrations of these metals compared to other sites.  The high risk species, exchangeable and the organic bound, were the most predominant in the crude oil exploration sites but their concentrations reduced away from these sites downstream.  The residual fraction which was least in the crude oil prospecting site was the most predominant in the farthest distant sites downstream.  There are indications of self-management of the metals in the costal system through favourable biogeochemical reactions that is partitioning the metals from the high risk species to the low risk ones and the non-toxic residual fraction.  It could however be concluded that the sediments from the crude oil prospecting area may serve as non-point sources of metal contaminant to the coastal system, they have higher metal bioavailability and higher toxicity risk potential than the other sites which should be curtained.
dc.format.mimetypeapplication/pdf
dc.language.isospa
dc.publisherUNIVERSIDAD NACIONAL DE COLOMBIA
dc.relationhttp://revistas.unal.edu.co/index.php/esrj/article/view/34299
dc.relation.ispartofUniversidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal
dc.relation.ispartofEarth Sciences Research Journal
dc.relation.ispartofseriesEarth Sciences Research Journal; Vol. 17, núm. 1 (2013) Earth Sciences Research Journal; Vol. 17, núm. 1 (2013) 2339-3459 1794-6190
dc.rightsDerechos reservados - Universidad Nacional de Colombia
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.titleMetal speciation in sediments from crude oil prospecting in the coastal area of ondo state, nigeria
dc.typeArtículo de revista
dc.type.driverinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.eprintshttp://bdigital.unal.edu.co/34185/
dc.relation.referencesOlu-Owolabi, Bamidele I. and Agunbiade, Foluso O. and Adebowale, Kayode O. (2013) Metal speciation in sediments from crude oil prospecting in the coastal area of ondo state, nigeria. Earth Sciences Research Journal; Vol. 17, núm. 1 (2013) Earth Sciences Research Journal; Vol. 17, núm. 1 (2013) 2339-3459 1794-6190 .
dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.subject.proposalmetals
dc.subject.proposalfate
dc.subject.proposalspeciation
dc.subject.proposalbiogeochemical reactions
dc.subject.proposalcoastal sediments
dc.type.coarhttp://purl.org/coar/resource_type/c_6501
dc.type.coarversionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.contentText
dc.type.redcolhttp://purl.org/redcol/resource_type/ART
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2


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Atribución-NoComercial 4.0 InternacionalThis work is licensed under a Creative Commons Reconocimiento-NoComercial 4.0.This document has been deposited by the author (s) under the following certificate of deposit