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Yttrium and rare earth elements fractionation in salt marsh halophyte plants

2018Journal article Restricted access
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dc.contributor.authorBrito, Pedro
dc.contributor.authorMalvar, Margarida
dc.contributor.authorGalinha, Catarina
dc.contributor.authorCaçador, Isabel
dc.contributor.authorCanário, João
dc.contributor.authorAraújo, M. Fátima
dc.contributor.authorRaimundo, Joana
dc.date.accessioned2019-06-25T09:47:40Z
dc.date.available2019-06-25T09:47:40Z
dc.date.issued2018
dc.description.abstractSalt marshes act as natural deposits of different metals (e.g. heavy-metals), while halophyte plants are known to retain and accumulate them in the different tissues. Scarce data exists on accumulation, partition and fractionation of YREE in these plants. To study the relationship between halophyte plants and YREE, contents of these metals were determined by ICP-MS in sediment, and in the different plants organs, from Rosário's salt marsh, in Tagus estuary (SW Europe). Results show significant differences (p < 0.001) in YREE contents between sediments. In non-colonised sediment Y was lower (5.0-18 mg·kg-1) compared to the Sarcocornia fruticosa and Spartina maritima sediment cores (19-26 and 20-26 mg·kg-1, respectively). The same was observed for ΣREE, with lower values in non-colonised sediment (32-138 mg·kg-1), while colonised ones presented higher contents (146-174 and 151-190 mg·kg-1, for S. fruticosa and S. maritima, respectively). These significant differences (p < 0.05) are explained by the sediments' nature. Yttrium and ΣREE Al-normalised ratios in non-colonised sediment ranged from 1.5 to 2.3 and 11 to 13, respectively. The colonised sediments revealed significant higher ratios (particularly for ΣREE/Al ratios; p < 0.001), varying from Y/Al: 1.8-2.3 and ΣREE: 13-16 for S. fruticosa, and Y/Al: 1.4-2.3 and ΣREE: 12-18, for S. maritima. Results suggest that these plants may promote YREE enrichment in the sediments. No differences in fractionation patterns among sediments and in both species roots were found, but fractionation was different from those in the sediment, with similar middle-REE (MREE) enrichment and no light-REE (LREE) and heavy-REE (HREE) fractionation. No evidence of YREE transfer to aboveground organs was observed. Different fractionation patterns in stems and leaves were registered, with clear enrichment of LREE relative to HREE and an increase in the MREE enrichment. Therefore, these plants showed low ability to accumulate and translocate YREE but may promote its enrichment in the sediments.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.scitotenv.2018.06.291pt_PT
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/10451/38803
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectYttriumpt_PT
dc.subjectLanthanidespt_PT
dc.subjectYREE fractionationpt_PT
dc.subjectHalophytespt_PT
dc.subjectSalt marsh sedimentspt_PT
dc.titleYttrium and rare earth elements fractionation in salt marsh halophyte plantspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1126pt_PT
oaire.citation.startPage1117pt_PT
oaire.citation.titleScience of the Total Environmentpt_PT
oaire.citation.volume643pt_PT
person.familyNameCaçador
person.givenNameIsabel
person.identifier.ciencia-id631C-9FFE-CA81
person.identifier.orcid0000-0002-4475-6091
person.identifier.ridC-2618-2012
person.identifier.scopus-author-id6602533871
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication02ecb390-88b9-4e2f-8690-eba66c3b5311
relation.isAuthorOfPublication.latestForDiscovery02ecb390-88b9-4e2f-8690-eba66c3b5311

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