Heavy metal pollution and assessment in the tidal flat sediments of Haizhou Bay,China |
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| Authors: | Rui Zhang Li Zhou Fan Zhang Yingjun Ding Jinrong Gao Jing Chen Hongqiang Yan Wei Shao |
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| Institution: | 1. School of Geodesy and Geomatics Engineering, Huaihai Institute of Technology, Lianyungang 222005, Jiangsu Province, China;2. State Key Laboratory of Pollution Control and Resources Reuse, Nanjing University, Nanjing 210093, China;3. Jiangsu Marine Resources Development Research Institute, Huaihai Institute of Technology, Lianyungang 222001, Jiangsu Province, China |
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| Abstract: | The heavy metal inventory and the ecological risk of the tidal flat sediments in Haizhou Bay were investigated. Results show that the average concentrations of heavy metals in the surface sediments exceeded the environment background values of Jiangsu Province coastal soil, suggesting that the surface sediments were mainly polluted by heavy metals (Cd, Cr, Cu, Mn, Pb and Zn). In addition, the profiles of heavy metals fluxes can reflect the socio-economic development of Lianyungang City, and heavy metals inputs were attributed to anthropogenic activities. Cr, Cu, Pb and Zn were mainly present in the non-bioavailable residual form in surface sediments, whereas Cd and Mn were predominantly in the highly mobile acid soluble and reducible fractions. The ecological risk of the polluted sediments stemmed mainly from Cd and Pb. According to the Sediment quality guidelines (SQGs), however, the adverse biological effects caused by the heavy metals occasionally occurred in tidal flat. |
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| Keywords: | Heavy metal Tidal flat Environmental contamination Sediment quality guidelines Ecological risk assessment |
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