Accumulation of trace metals in sediments in a Mediterranean Lagoon: Usefulness of metal sediment fractionation and elutriate toxicity assessment

被引：63

作者：

Zaaboub, Noureddine ^{[1
]}

Martins, Maria Virginia Alves ^{[2
]}

Dhib, Amel ^{[3
]}

Bejaoui, Bechir ^{[1
]}

Galgani, Francois ^{[4
]}

El Bour, Monia ^{[1
]}

Aleya, Lotfi ^{[3
]}

机构：

[1] Inst Natl Sci & Technol Mer, Tunis, Tunisia

[2] Univ Estado Rio De Janeiro, Fac Geol, BR-20550013 Rio De Janeiro, RJ, Brazil

[3] IFREMER, Lab Environm Ressources PAC, Corse Imm Agostini, F-20600 Zi Furiani, Bastia, France

[4] Univ Bourgogne Franche Comte, CNRS, Lab Chronoenvironm, UMR 6249, F-25030 Besancon, France

来源：

ENVIRONMENTAL POLLUTION | 2015年 / 207卷

关键词：

Coastal lagoons; Trace metals; Toxicity; Bioassays; Pollution effects; SURFACE SEDIMENTS; HEAVY-METALS; FRESH-WATER; RIVER; SPECIATION; POLLUTION; NORTHERN; COPPER; SEA; CU;

D O I：

10.1016/j.envpol.2015.09.033

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：226 / 237

页数：12

共 69 条

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