Evaluation of heavy metal pollution risk in surface sediment of the South Lagoon of Tunis by a sequential extraction procedure
In this study, the total concentrations and chemical forms of heavy metals (Fe, Zn, Pb, Cu, Cr, Cd, and Ni) in surface sediments of the South Lagoon of Tunis located in northeast Tunisia were investigated. Multiple geochemical indices were applied to assess the potential environmental risks. The So...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2022-04-01
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| Series: | Scientia Marina |
| Subjects: | |
| Online Access: | https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1917 |
| _version_ | 1811313048535695360 |
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| author | Myriam Abidi Asma Yahyaoui Rim Ben Amor Lassaad Chouba Moncef Gueddari |
| author_facet | Myriam Abidi Asma Yahyaoui Rim Ben Amor Lassaad Chouba Moncef Gueddari |
| author_sort | Myriam Abidi |
| collection | DOAJ |
| description |
In this study, the total concentrations and chemical forms of heavy metals (Fe, Zn, Pb, Cu, Cr, Cd, and Ni) in surface sediments of the South Lagoon of Tunis located in northeast Tunisia were investigated. Multiple geochemical indices were applied to assess the potential environmental risks. The South Lagoon is a valuable regional resource for fisheries, tourism and aquaculture. Total metal concentrations exhibited significant spatial variation attributed to the principal water circulation direction (east to west). The chemical speciation of Fe, Cr and Ni shows that they were mostly related to the residual fraction (Fe 34.8%, Cr 37.4% and Ni 37.9%), while Pb, Zn, Cu, and Cd were mostly related to the non-residual fraction (labile fraction Pb 89.4%, Zn 26.1%, Cu 71.8% and Cd 84.3%). Pb, Zn, Cu and Cr are of high potential bioavailability. The highest pollution was found on the west side of the lagoon according to the calculated global contamination factors. Besides, individual contamination factors, Pb followed by Zn and Cu, posed the highest risk of contamination. This study shows that, even after dredging, the persistence of low concentrations of some contaminants may cause environmental problems in certain physico-chemical conditions.
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| first_indexed | 2024-04-13T10:47:22Z |
| format | Article |
| id | doaj.art-e4a395299f4449cf9e69052729eb1d56 |
| institution | Directory Open Access Journal |
| issn | 0214-8358 1886-8134 |
| language | English |
| last_indexed | 2024-04-13T10:47:22Z |
| publishDate | 2022-04-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Scientia Marina |
| spelling | doaj.art-e4a395299f4449cf9e69052729eb1d562022-12-22T02:49:46ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342022-04-0186110.3989/scimar.05172.028Evaluation of heavy metal pollution risk in surface sediment of the South Lagoon of Tunis by a sequential extraction procedureMyriam Abidi0Asma Yahyaoui1Rim Ben Amor2Lassaad Chouba3Moncef Gueddari4Laboratory of Geochemistry and Environmental Geology, Department of Geology, Faculty of Sciences of Tunis (FST), University of Tunis El ManarLaboratory of Marine Environment, National Institute of Marine Science and Technology (INSTM)Laboratory of Geochemistry and Environmental Geology, Department of Geology, Faculty of Sciences of Tunis (FST), University of Tunis El ManarLaboratory of Marine Environment, National Institute of Marine Science and Technology (INSTM)Laboratory of Geochemistry and Environmental Geology, Department of Geology, Faculty of Sciences of Tunis (FST), University of Tunis El Manar In this study, the total concentrations and chemical forms of heavy metals (Fe, Zn, Pb, Cu, Cr, Cd, and Ni) in surface sediments of the South Lagoon of Tunis located in northeast Tunisia were investigated. Multiple geochemical indices were applied to assess the potential environmental risks. The South Lagoon is a valuable regional resource for fisheries, tourism and aquaculture. Total metal concentrations exhibited significant spatial variation attributed to the principal water circulation direction (east to west). The chemical speciation of Fe, Cr and Ni shows that they were mostly related to the residual fraction (Fe 34.8%, Cr 37.4% and Ni 37.9%), while Pb, Zn, Cu, and Cd were mostly related to the non-residual fraction (labile fraction Pb 89.4%, Zn 26.1%, Cu 71.8% and Cd 84.3%). Pb, Zn, Cu and Cr are of high potential bioavailability. The highest pollution was found on the west side of the lagoon according to the calculated global contamination factors. Besides, individual contamination factors, Pb followed by Zn and Cu, posed the highest risk of contamination. This study shows that, even after dredging, the persistence of low concentrations of some contaminants may cause environmental problems in certain physico-chemical conditions. https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1917heavy metal speciationenvironmental riskssediment pollution indexMediterranean lagoon |
| spellingShingle | Myriam Abidi Asma Yahyaoui Rim Ben Amor Lassaad Chouba Moncef Gueddari Evaluation of heavy metal pollution risk in surface sediment of the South Lagoon of Tunis by a sequential extraction procedure Scientia Marina heavy metal speciation environmental risks sediment pollution index Mediterranean lagoon |
| title | Evaluation of heavy metal pollution risk in surface sediment of the South Lagoon of Tunis by a sequential extraction procedure |
| title_full | Evaluation of heavy metal pollution risk in surface sediment of the South Lagoon of Tunis by a sequential extraction procedure |
| title_fullStr | Evaluation of heavy metal pollution risk in surface sediment of the South Lagoon of Tunis by a sequential extraction procedure |
| title_full_unstemmed | Evaluation of heavy metal pollution risk in surface sediment of the South Lagoon of Tunis by a sequential extraction procedure |
| title_short | Evaluation of heavy metal pollution risk in surface sediment of the South Lagoon of Tunis by a sequential extraction procedure |
| title_sort | evaluation of heavy metal pollution risk in surface sediment of the south lagoon of tunis by a sequential extraction procedure |
| topic | heavy metal speciation environmental risks sediment pollution index Mediterranean lagoon |
| url | https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1917 |
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