Contamination of Heavy Metals in Sediments from an Estuarine Bay, South China: Comparison with Previous Data and Ecological Risk Assessment
文献类型： 外文期刊
作者： Zhang, Zaiwang 1 ; Jin, Jianchao 3 ; Zhang, Jiqiang 1 ; Zhao, Deyong 1 ; Li, He 1 ; Yang, Changping 2 ; Huang, Yingbang 2 ;
作者机构： 1.Binzhou Univ, Shandong Engn & Technol Res Ctr Ecol Fragile Belt, Sch Biol & Environm Engn, Binzhou 256600, Peoples R China
2.Chinese Acad Fisheries Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Peoples R China
3.Shandong Anhe Safety Technol Res Inst Co Ltd, Binzhou 256600, Peoples R China
4.Yellow River Delta Sustainable Dev Res Inst, Management Ctr, Dongying 257000, Peoples R China
关键词： heavy metal; sediment; ecological risk; Shantou Bay
期刊名称：PROCESSES （ 影响因子：3.352； 五年影响因子：3.338 ）
ISSN：
年卷期： 2022 年 10 卷 5 期
页码：
收录情况： SCI
摘要： Heavy metal contamination is an elevating threat to the aquatic environment of estuarine bays. In the present study, surface sediments from Shantou Bay in South China were collected and detected for the concentrations of heavy metals including copper (Cu), zinc (Zn), chromium (Cr), nickel (Ni), cadmium (Cd), and lead (Pb) using ICP-MS. Spatial distribution, temporal trend, and potential ecological risks for the metal pollution were discussed. The results showed that levels of metals generally decreased by the order of Zn > Pb > Cr > Cu > Ni > Cd. Spatial variation of metal contents was observed with an order of Rongjiang River > Niutian Bay > Shanthou Harbor for Zn and Cd. Sediments of the Niutian Bay were observed with higher levels of Cu, Cr, Ni, and Pb. Compared with reported data from the same region at different sampling periods, a low-high-low trend was observed for the concentrations of the six elements, suggesting a great improvement of sediment quality in Shantou Bay. The average I-geo values suggested moderate pollution of Cu, Zn, Pb, and Cd. The potential ecological risks of Cu, Pb, Zn, Ni, and Cr were in low levels. More attention should be paid to the Cd pollution, considering its great values of potential ecological risk index. Our findings provided better understanding of heavy metal pollution in estuarine environments.
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