Evaluation of Toxicity Potential and Spatial Distribution of Ecological Risk of Heavy Metals in Surface Sediments of Anzali International Wetland Using GIS
Introduction; Due to the potential toxicity and ecological risk of heavy metals in aquatic ecosystems, measuring and evaluating their concentration in different parts of aquatic environments is very necessary. Therefore, the present study measures the concentrations of Cd, Cr, Pb, Ni, As and Zn and...
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Shahid Beheshti University
2022-12-01
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| Series: | علوم محیطی |
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| author | Zhaleh Amini Reza Anvaripour masoud Hatami-manesh Jaber Aazami |
| author_facet | Zhaleh Amini Reza Anvaripour masoud Hatami-manesh Jaber Aazami |
| author_sort | Zhaleh Amini |
| collection | DOAJ |
| description | Introduction; Due to the potential toxicity and ecological risk of heavy metals in aquatic ecosystems, measuring and evaluating their concentration in different parts of aquatic environments is very necessary. Therefore, the present study measures the concentrations of Cd, Cr, Pb, Ni, As and Zn and evaluates the spatial distribution of their ecological risk in the surface sediments of Anzali International Wetland.Materials and methods; 50 stations in different parts of the wetland were selected for sampling. After preparation and acid digestion of samples, the concentrations of these metals were determined by an atomic absorption spectrometer. In order to zoning the toxicity and ecological risk of metals, the inverse distance weighting (IDW) method was used.Results and discussion; The total mean concentrations of metals were Zn (79.24 71 6.71), Cr (19.4 21 21.04), Ni (18.96 62 5.62), Pb (13.3 72 72.50), As (7.62 96 4.96) and Cd (1.12 ± 3.16) mg/kg, respectively. Investigation of potential acute toxicity, RI, mHQ and PLI indicated low pollution status in wetland sediments. The environmental risk of the metals in the sediments were evaluated as (Cd> As> Pb> Ni> Zn> Cr). In addition, the distribution of toxicity and ecological risk of metals in different parts of the wetland does not follow the same pattern and the western parts of the wetland have more risks. Conclusion; According to the results, Potential acute toxicity, PLI, mHQ and ecological risk of heavy metals in the sediments of the region are assessed as low and medium. The intense expansion of human activities in the areas around the wetland, along with the deposition and entry of various pollutants in this ecosystem, confirms the need for continuous monitoring of the wetland and assessment of its ecological health risk. |
| format | Article |
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| issn | 1735-1324 2588-6177 |
| language | fas |
| publishDate | 2022-12-01 |
| publisher | Shahid Beheshti University |
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| series | علوم محیطی |
| spelling | doaj-art-3c1433ee0ca949e2a239591bfec9aa9d2025-08-20T02:18:32ZfasShahid Beheshti Universityعلوم محیطی1735-13242588-61772022-12-0120416318210.48308/envs.2022.1192102432Evaluation of Toxicity Potential and Spatial Distribution of Ecological Risk of Heavy Metals in Surface Sediments of Anzali International Wetland Using GISZhaleh Amini0Reza Anvaripour1masoud Hatami-manesh2Jaber Aazami3Department of Wetlands Ecosystem Management and Planning, Conservation and Rehabilitation of Wetlands Bureau, Department of Environment (DoE), Tehran, IranDepartment of Wetlands Ecosystem Management and Planning, Conservation and Rehabilitation of Wetlands Bureau, Department of Environment (DoE), Tehran, IranDepartment of Wetlands Ecosystem Management and Planning, Conservation and Rehabilitation of Wetlands Bureau, Department of Environment (DoE), Tehran, IranDepartment of Environmental Sciences, Faculty of Sciences, University of Zanjan, Zanjan, IranIntroduction; Due to the potential toxicity and ecological risk of heavy metals in aquatic ecosystems, measuring and evaluating their concentration in different parts of aquatic environments is very necessary. Therefore, the present study measures the concentrations of Cd, Cr, Pb, Ni, As and Zn and evaluates the spatial distribution of their ecological risk in the surface sediments of Anzali International Wetland.Materials and methods; 50 stations in different parts of the wetland were selected for sampling. After preparation and acid digestion of samples, the concentrations of these metals were determined by an atomic absorption spectrometer. In order to zoning the toxicity and ecological risk of metals, the inverse distance weighting (IDW) method was used.Results and discussion; The total mean concentrations of metals were Zn (79.24 71 6.71), Cr (19.4 21 21.04), Ni (18.96 62 5.62), Pb (13.3 72 72.50), As (7.62 96 4.96) and Cd (1.12 ± 3.16) mg/kg, respectively. Investigation of potential acute toxicity, RI, mHQ and PLI indicated low pollution status in wetland sediments. The environmental risk of the metals in the sediments were evaluated as (Cd> As> Pb> Ni> Zn> Cr). In addition, the distribution of toxicity and ecological risk of metals in different parts of the wetland does not follow the same pattern and the western parts of the wetland have more risks. Conclusion; According to the results, Potential acute toxicity, PLI, mHQ and ecological risk of heavy metals in the sediments of the region are assessed as low and medium. The intense expansion of human activities in the areas around the wetland, along with the deposition and entry of various pollutants in this ecosystem, confirms the need for continuous monitoring of the wetland and assessment of its ecological health risk.https://envs.sbu.ac.ir/article_102432_c56b5f97f036c1d41893583a7132fa6d.pdfecological riskacute toxicitymodified hazard quotientheavy metalsanzali wetland |
| spellingShingle | Zhaleh Amini Reza Anvaripour masoud Hatami-manesh Jaber Aazami Evaluation of Toxicity Potential and Spatial Distribution of Ecological Risk of Heavy Metals in Surface Sediments of Anzali International Wetland Using GIS علوم محیطی ecological risk acute toxicity modified hazard quotient heavy metals anzali wetland |
| title | Evaluation of Toxicity Potential and Spatial Distribution of Ecological Risk of Heavy Metals in Surface Sediments of Anzali International Wetland Using GIS |
| title_full | Evaluation of Toxicity Potential and Spatial Distribution of Ecological Risk of Heavy Metals in Surface Sediments of Anzali International Wetland Using GIS |
| title_fullStr | Evaluation of Toxicity Potential and Spatial Distribution of Ecological Risk of Heavy Metals in Surface Sediments of Anzali International Wetland Using GIS |
| title_full_unstemmed | Evaluation of Toxicity Potential and Spatial Distribution of Ecological Risk of Heavy Metals in Surface Sediments of Anzali International Wetland Using GIS |
| title_short | Evaluation of Toxicity Potential and Spatial Distribution of Ecological Risk of Heavy Metals in Surface Sediments of Anzali International Wetland Using GIS |
| title_sort | evaluation of toxicity potential and spatial distribution of ecological risk of heavy metals in surface sediments of anzali international wetland using gis |
| topic | ecological risk acute toxicity modified hazard quotient heavy metals anzali wetland |
| url | https://envs.sbu.ac.ir/article_102432_c56b5f97f036c1d41893583a7132fa6d.pdf |
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