Accumulation of trace metals in sediments in a Mediterranean Lagoon: Usefulness of metal sediment fractionation and elutriate toxicity assessment.
Identifieur interne : 000054 ( Main/Exploration ); précédent : 000053; suivant : 000055Accumulation of trace metals in sediments in a Mediterranean Lagoon: Usefulness of metal sediment fractionation and elutriate toxicity assessment.
Auteurs : Noureddine Zaaboub [Tunisie] ; Maria Virgínia Alves Martins [Brésil] ; Amel Dhib [France] ; Béchir Béjaoui [Tunisie] ; François Galgani [France] ; Monia El Bour [Tunisie] ; Lotfi Aleya [France]Source :
- Environmental pollution (Barking, Essex : 1987) [ 1873-6424 ] ; 2015.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Metals, Metals, Heavy, Sulfides.
- chemical , toxicity : Metals, Heavy.
- geographic : Mediterranean Sea, Nickel.
- analysis : Geologic Sediments.
- Chemical Fractionation, Environmental Monitoring, Particle Size.
- mix :
Abstract
The authors investigated sediment quality in Bizerte Lagoon (Tunisia) focusing on geochemical characteristics, metal sediment fractionation and elutriate toxicity assessment. Nickel, Cu, Zn, Pb, Cr and Cd partitioning in sediments was studied; accumulation and bioavailability were elucidated using enrichment factors, sequential extractions, redox potential, acid volatile sulfide and biotest procedures in toxicity evaluation. Results revealed an accumulation for Pb and Zn, reaching 99 and 460 mg kg(-1) respectively. In addition, the acid volatile sulfide values were high in both eastern and western lagoon areas, thus affecting metal availability. Mean enrichment factor values for Pb and Zn were 4.8 and 4.9, respectively, with these elements as the main contributors to the lagoon's moderate enrichment level. Toxicity levels were influenced by accumulation of Zn in different surface sediment areas. Core sediments were investigated in areas with the highest metal concentrations; metal fractionation and biotest confirmed that Zn contributes to sediment toxicity.
Url:
DOI: 10.1016/j.envpol.2015.09.033
PubMed: 26412262
Affiliations:
- Brésil, France, Tunisie
- Bourgogne-Franche-Comté, Franche-Comté, Gouvernorat de Tunis, État de Rio de Janeiro
- Besançon, Tunis
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Le document en format XML
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Nickel, Cu, Zn, Pb, Cr and Cd partitioning in sediments was studied; accumulation and bioavailability were elucidated using enrichment factors, sequential extractions, redox potential, acid volatile sulfide and biotest procedures in toxicity evaluation. Results revealed an accumulation for Pb and Zn, reaching 99 and 460 mg kg(-1) respectively. In addition, the acid volatile sulfide values were high in both eastern and western lagoon areas, thus affecting metal availability. Mean enrichment factor values for Pb and Zn were 4.8 and 4.9, respectively, with these elements as the main contributors to the lagoon's moderate enrichment level. Toxicity levels were influenced by accumulation of Zn in different surface sediment areas. Core sediments were investigated in areas with the highest metal concentrations; metal fractionation and biotest confirmed that Zn contributes to sediment toxicity.</div></front></TEI><affiliations><list><country><li>Brésil</li><li>France</li><li>Tunisie</li></country><region><li>Bourgogne-Franche-Comté</li><li>Franche-Comté</li><li>Gouvernorat de Tunis</li><li>État de Rio de Janeiro</li></region><settlement><li>Besançon</li><li>Tunis</li></settlement></list><tree><country name="Tunisie"><region name="Gouvernorat de Tunis"><name sortKey="Zaaboub, Noureddine" sort="Zaaboub, Noureddine" uniqKey="Zaaboub N" first="Noureddine" last="Zaaboub">Noureddine Zaaboub</name></region><name sortKey="Bejaoui, Bechir" sort="Bejaoui, Bechir" uniqKey="Bejaoui B" first="Béchir" last="Béjaoui">Béchir Béjaoui</name><name sortKey="El Bour, Monia" sort="El Bour, Monia" uniqKey="El Bour M" first="Monia" last="El Bour">Monia El Bour</name></country><country name="Brésil"><region name="État de Rio de Janeiro"><name sortKey="Martins, Maria Virginia Alves" sort="Martins, Maria Virginia Alves" uniqKey="Martins M" first="Maria Virgínia Alves" last="Martins">Maria Virgínia Alves Martins</name></region></country><country name="France"><noRegion><name sortKey="Dhib, Amel" sort="Dhib, Amel" uniqKey="Dhib A" first="Amel" last="Dhib">Amel Dhib</name></noRegion><name sortKey="Aleya, Lotfi" sort="Aleya, Lotfi" uniqKey="Aleya L" first="Lotfi" last="Aleya">Lotfi Aleya</name><name sortKey="Galgani, Francois" sort="Galgani, Francois" uniqKey="Galgani F" first="François" last="Galgani">François Galgani</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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