6533b854fe1ef96bd12aec79
RESEARCH PRODUCT
Trace element accumulation and elutriate toxicity in surface sediment in northernTunisia (Tunis Gulf, southern Mediterranean)
Amel DhibLotfi AleyaWalid OueslatiNoureddine ZaaboubMonia El BourFrançois GalganiMohamed Amine HelaliMaria Virgínia Alves MartinsRym EnnouriAyed Addedsubject
Mediterranean climateOysterGeologic SedimentsTunisia010504 meteorology & atmospheric sciences010501 environmental sciencesAquatic ScienceOceanography01 natural sciencesBioassaysAcid-volatile-sulfide[ SDE ] Environmental SciencesTrace metalsCoastal zonebiology.animalMetals Heavy14. Life underwaterMarine sedimentEffluent0105 earth and related environmental sciencesHydrologybiologyToxicityTrace elementSedimentfood and beveragesPollution6. Clean waterGrain sizeTrace ElementsEnvironmental chemistryToxicity[SDE]Environmental SciencesGeologyWater Pollutants Chemicalgeographic locationsEnvironmental Monitoringdescription
International audience; Metal concentrations in sediments were investigated in the Gulf of Tunis, Tunisia, in relation to anthropic activities along the Mejerda River and Ghar El Melh Lagoon, with effluents discharged into the gulf. Distribution of grain size showed that the silty fraction is dominant with 53%, while sand and clay averages are 34 and 12% respectively. Zn concentration increased in the vicinity of the Mejerda River while Pb was at its highest levels at the outlet of Ghar El Mehl Lagoon. Sediment elutriate toxicity, as measured by oyster embryo bioassays, ranged from 10 to 45% abnormalities after 24 h, but no relation was found between metal concentration and sediment toxicity. The AVS fraction that represents monosulfide concentrations in the sediment was higher in the central part of the gulf than in the coastal zone. The results reveal the influence of AVS, TOC and grain size on metal speciation andsediment toxicity
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-01 |