Distribution and Assessment of Heavy Metal Toxicity in Sediment Cores from Bizerte Lagoon, Tunisia

Overview

Journal Environ Monit Assess

Publisher Springer

Specialty Environmental Health

Date 2017 Jun 29

PMID 28656557

Citations 5

Authors

Haifa Ben Mna

Walid Oueslati

Mohamed Amine Helali

Noureddine Zaaboub

Ayed Added

Lotfi Aleya

Affiliations

Soon will be listed here.

Abstract

To examine the state of pollution of Bizerte Lagoon which is exposed to intense anthropogenic pressure, two sediment cores were taken at two sites, one undergoes the dual effects of both marine waters arriving from the Mediterranean Sea through the Channel, and also of freshwater from the Tinja River; the other core is located at the center of the lagoon where water depth is maximal (12 m). Heavy metal concentrations in the two cores were assessed, with calculated enrichment factors and geo-accumulation indexes. Core sediments were also studied for chemical speciation and their monosulfide contents were measured. Results from enrichment factors and geo-accumulation indexes show an accumulation of Cd, Zn, Cr, and Pb, while chemical speciation revealed a risk only from Cd and Mn. Comparison of sequential extraction values with those of acid volatile sulfides revealed that non-toxic effects may be caused by any of the studied metals in the sediment.

Citing Articles

Ecological risk assessment of heavy metals in the sediments of a Mediterranean lagoon complex.

Zoidou M, Sylaios G J Environ Health Sci Eng. 2021; 19(2):1835-1849.

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Metal transfer budgets in a Mediterranean marine environment subjected to natural and anthropogenic inputs: case of the Mejerda River Delta (Gulf of Tunis, northern Tunisia).

Oueslati W, Helali M, Zaaboub N, Added A, Aleya L Environ Monit Assess. 2019; 191(6):386.

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A comparative study of trace elements in Cymodocea nodosa from three semi-enclosed coastal areas in Tunisia.

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Seasonal and spatial contamination statuses and ecological risk of sediment cores highly contaminated by heavy metals and metalloids in the Xiangjiang River.

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How useful are geochemical and mineralogical indicators in assessing trace metal contamination and bioavailability in a post-restoration Mediterranean lagoon?.

Oueslati W, Helali M, Mensi I, Bayaoui M, Touati H, Khadraoui A Environ Sci Pollut Res Int. 2018; 25(25):25045-25059.

PMID: 29934833 DOI: 10.1007/s11356-018-2575-0.

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