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Contaminated water, stream sediments and soils close to the abandoned Pinhal do Souto uranium mine, central Portugal

2014Journal article Open access
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dc.contributor.authorNeiva, A.M.R.
dc.contributor.authorCarvalho, Paula
dc.contributor.authorAntunes, I.M.H.R.
dc.contributor.authorSilva, M.M.V.G.
dc.contributor.authorSantos, A.C.T.
dc.contributor.authorPinto, M.M.S.C.
dc.contributor.authorCunha, Pedro Proença
dc.date.accessioned2015-11-25T13:09:57Z
dc.date.available2015-11-25T13:09:57Z
dc.date.issued2014
dc.description.abstractThe Pinhal do Souto mine exploited a quartz vein containing uranium minerals, mainly autunite and torbernite. This vein intersects a two-mica granite containing 10 ppm U and uraninite. The mine was exploited underground and produced 93091 kg U3O8 between 1978 and 1989 and was then closed down. Two dumps were left in the mine area and these are partially covered by natural vegetation. Groundwater and surface water have a similar slightly acid-to-alkaline pH. The 2  2 UO is abundant and complexed with 2  3 CO , under neutral to alkaline pH. Metals and arsenic concentrations in the water increase during the dry season due to the evaporation. Uranium concentration in the water increases (up to 104.42 g/l) in the wet season, because secondary uranium minerals are dissolved and uranium is released into the water. Soils tend to retain a higher concentration of several metals, including U (up to 336.79 mg/kg) than stream sediments (up to 35.68 mg/kg), because vermiculite from the former could adsorb it more easily than could kaolinite from the latter. The Fe-oxides precipitate retains the highest concentrations of several metals, including U and Th (up to 485.20 and 1053.12 mg/kg, respectively) and the metalloid As, because it is richer in oxyhydroxides and organic matter than stream sediments and soils. The median concentrations of Fe, As, Cd, Pb, Sb, Th, U, W and Zn in soils from this area are higher than in European soils of the FOREGS data. Waters from dry and wet seasons, stream sediments and soils are contaminated and must not be used. This area was compared with another Portuguese abandoned uranium mine area. The former mine caused a lower environmental impact attributable to it having lower sulfide concentration and mineral alteration than in the latter.pt_PT
dc.identifier.citationNEIVA, A. M. R. [et al.] (2014) - Contaminated water, stream sediments and soils close to the abandoned Pinhal do Souto uranium mine, central Portugal. Journal of Geochemical Exploration. ISSN 0375-6742. Vol. 136 p. 102-117pt_PT
dc.identifier.doi10.1016/j.gexplo.2013.10.014pt_PT
dc.identifier.issn0375-6742
dc.identifier.urihttp://hdl.handle.net/10400.11/3104
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S037567421300215Xpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAbandoned uranium minept_PT
dc.subjectWaterpt_PT
dc.subjectStream sedimentspt_PT
dc.subjectSoilspt_PT
dc.subjectContaminationpt_PT
dc.titleContaminated water, stream sediments and soils close to the abandoned Pinhal do Souto uranium mine, central Portugalpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage117pt_PT
oaire.citation.startPage102pt_PT
oaire.citation.titleJournal of Geochemical Explorationpt_PT
oaire.citation.volume136pt_PT
person.familyNameCarvalho
person.familyNameantunes
person.givenNamePaula
person.givenNameIsabel Margarida
person.identifier.ciencia-idCB1E-FAD2-37D6
person.identifier.orcid0000-0002-3767-5410
person.identifier.orcid0000-0003-3456-5926
person.identifier.ridM-1043-2013
person.identifier.scopus-author-id6701817085
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationf3f92fb6-6841-483f-b6bc-68dcb84b64f8
relation.isAuthorOfPublication1db83c95-f80c-41bb-b5c6-437ab32d9683
relation.isAuthorOfPublication.latestForDiscovery1db83c95-f80c-41bb-b5c6-437ab32d9683

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