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| Characteristics and ecological risk assessment of heavy metals in sediments of the Xiangxi River |
| Received:March 02, 2017 |
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| KeyWord:heavy metal;fraction;ecological risk assessment;sediment;Xiangxi River |
| Author Name | Affiliation | E-mail | | WANG Lin-quan | Water Resources and Environmental Engineering, Three Gorges University, Yichang 443002, China | | | LUO Yu-hong | Water Resources and Environmental Engineering, Three Gorges University, Yichang 443002, China
Geological Disasters in the Three Gorges Area and Ecological Environment Collaborative Innovation Center in Hubei Province Three Gorges University, Yichang 443002, China
Ministry of Education, Engineering Research Center of the Ecological Environment of the Three Gorges Reservoir Area of the Three Gorges University, Yichang 443002, China | | | DAI Ze-long | Geological Disasters in the Three Gorges Area and Ecological Environment Collaborative Innovation Center in Hubei Province Three Gorges University, Yichang 443002, China | | | XU Tao | Water Resources and Environmental Engineering, Three Gorges University, Yichang 443002, China
Geological Disasters in the Three Gorges Area and Ecological Environment Collaborative Innovation Center in Hubei Province Three Gorges University, Yichang 443002, China
Ministry of Education, Engineering Research Center of the Ecological Environment of the Three Gorges Reservoir Area of the Three Gorges University, Yichang 443002, China | | | LI Xiao-ling | Geological Disasters in the Three Gorges Area and Ecological Environment Collaborative Innovation Center in Hubei Province Three Gorges University, Yichang 443002, China
Ministry of Education, Engineering Research Center of the Ecological Environment of the Three Gorges Reservoir Area of the Three Gorges University, Yichang 443002, China | | | HUANG Ying-ping | Water Resources and Environmental Engineering, Three Gorges University, Yichang 443002, China
Geological Disasters in the Three Gorges Area and Ecological Environment Collaborative Innovation Center in Hubei Province Three Gorges University, Yichang 443002, China
Ministry of Education, Engineering Research Center of the Ecological Environment of the Three Gorges Reservoir Area of the Three Gorges University, Yichang 443002, China | chem_ctgu@126.com |
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| Abstract: |
| In June 2016, 30 sediment samples were collected from 5 sampling sites in the Xiangxi River Basin of the Three Gorges Reservoir area. The concentration and fraction of Pb, Cd, Cu, and Cr were analyzed using a five-step continuous extraction method. The distribution of heavy metals in the sediments was evaluated by clustering analysis. The secondary and primary ratios of heavy metals in sediments were analyzed by morphological methods. The coefficient of variation of the heavy metals was in the following order:Pb >Cd >Cu >Cr. The samples were divided into three categories using clustering analysis:XX04 in the first category, XX01 and XXCJ in the second category, and XX06 and XX08 in the third category. The morphological analysis showed that Cu was mainly present in the inorganic sulfide-bound fraction and the residual fraction. Pb was mainly present in the carbonate-bound, Fe-Mn-oxide, and residual fractions. Cd was mainly present in the exchangeable and residual fractions, and Cr was mainly present in the residual fraction. The ecological risk assessment showed that the XX04 and XX06 samples were seriously polluted. Finally, Cd is the main heavy metal pollutant in Xiangxi River sediments. |
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