Pollution characteristics and risk assessment of heavy metals in the surface sediments of Dongting Lake water system during normal water period
In order to study the characteristics and ecological risks of heavy metal pollution in Dongting Lake, 24 sediment cores were collected in August, 2017. The content characteristics and the pollution status of heavy metals in the study area were analyzed by the method of Igeo, RI and mPEC-Q, and the i...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2020-05-01
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| Series: | European Journal of Remote Sensing |
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| Online Access: | http://dx.doi.org/10.1080/22797254.2020.1763207 |
| _version_ | 1819010633096495104 |
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| author | Bao Qian Cong Tang Yu Yang Xiao Xiao |
| author_facet | Bao Qian Cong Tang Yu Yang Xiao Xiao |
| author_sort | Bao Qian |
| collection | DOAJ |
| description | In order to study the characteristics and ecological risks of heavy metal pollution in Dongting Lake, 24 sediment cores were collected in August, 2017. The content characteristics and the pollution status of heavy metals in the study area were analyzed by the method of Igeo, RI and mPEC-Q, and the interrelation and source of heaty metals were evalutated by CA and PCA. The results showed that the concentrations of heavy metals in the surface sediments followed the order of Cr > Pb > Cu > As > Cd > Hg, and the contents of Hg, Cr, Cd, Pb, Cu were 7.0, 2.0, 9.3, 2.2, 2.3 times greater than the background values, respectively. The results using the geo-accumulation index and the potential ecological risk assessment indicated that Cd and Hg were considered as the dominant pollutants. The RI values followed the order of Cd > Hg > Cu > Pb > As > Cr and the mean value of mPEC-Q was 0.43, indicating that the sediments in all of the sampling sites had a 15%-29% probality of toxcity. Source analysis showed that As, Pb, Cd and Cu were homologous and mainly came from the industrial wastewater of the “Four-rivers” basin. |
| first_indexed | 2024-12-21T01:15:22Z |
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| id | doaj.art-7ae65041bf154422a85a8aae9fd67a44 |
| institution | Directory Open Access Journal |
| issn | 2279-7254 |
| language | English |
| last_indexed | 2024-12-21T01:15:22Z |
| publishDate | 2020-05-01 |
| publisher | Taylor & Francis Group |
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| series | European Journal of Remote Sensing |
| spelling | doaj.art-7ae65041bf154422a85a8aae9fd67a442022-12-21T19:20:47ZengTaylor & Francis GroupEuropean Journal of Remote Sensing2279-72542020-05-010011110.1080/22797254.2020.17632071763207Pollution characteristics and risk assessment of heavy metals in the surface sediments of Dongting Lake water system during normal water periodBao Qian0Cong Tang1Yu Yang2Xiao Xiao3Changjiang Water Resources Commission, CWRCCWRCCWRCChina Three Gorges UniversityIn order to study the characteristics and ecological risks of heavy metal pollution in Dongting Lake, 24 sediment cores were collected in August, 2017. The content characteristics and the pollution status of heavy metals in the study area were analyzed by the method of Igeo, RI and mPEC-Q, and the interrelation and source of heaty metals were evalutated by CA and PCA. The results showed that the concentrations of heavy metals in the surface sediments followed the order of Cr > Pb > Cu > As > Cd > Hg, and the contents of Hg, Cr, Cd, Pb, Cu were 7.0, 2.0, 9.3, 2.2, 2.3 times greater than the background values, respectively. The results using the geo-accumulation index and the potential ecological risk assessment indicated that Cd and Hg were considered as the dominant pollutants. The RI values followed the order of Cd > Hg > Cu > Pb > As > Cr and the mean value of mPEC-Q was 0.43, indicating that the sediments in all of the sampling sites had a 15%-29% probality of toxcity. Source analysis showed that As, Pb, Cd and Cu were homologous and mainly came from the industrial wastewater of the “Four-rivers” basin.http://dx.doi.org/10.1080/22797254.2020.1763207dongting lake water systemsedimentsheavy metalspollution characteristicsrisk assessment |
| spellingShingle | Bao Qian Cong Tang Yu Yang Xiao Xiao Pollution characteristics and risk assessment of heavy metals in the surface sediments of Dongting Lake water system during normal water period European Journal of Remote Sensing dongting lake water system sediments heavy metals pollution characteristics risk assessment |
| title | Pollution characteristics and risk assessment of heavy metals in the surface sediments of Dongting Lake water system during normal water period |
| title_full | Pollution characteristics and risk assessment of heavy metals in the surface sediments of Dongting Lake water system during normal water period |
| title_fullStr | Pollution characteristics and risk assessment of heavy metals in the surface sediments of Dongting Lake water system during normal water period |
| title_full_unstemmed | Pollution characteristics and risk assessment of heavy metals in the surface sediments of Dongting Lake water system during normal water period |
| title_short | Pollution characteristics and risk assessment of heavy metals in the surface sediments of Dongting Lake water system during normal water period |
| title_sort | pollution characteristics and risk assessment of heavy metals in the surface sediments of dongting lake water system during normal water period |
| topic | dongting lake water system sediments heavy metals pollution characteristics risk assessment |
| url | http://dx.doi.org/10.1080/22797254.2020.1763207 |
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