Heavy Metal Distribution in Surface Sediments of the Coastal Pearl Bay, South China Sea

文献类型： 外文期刊

第一作者： Yang, Changping

作者： Yang, Changping;Yang, Changping;Yu, Gang;Liu, Yan;Shan, Binbin;Wang, Liangming;Sun, Dianrong;Huang, Yingbang

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关键词： heavy metals; surface sediment; ecological risk assessment; Pearl 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

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收录情况： SCI

摘要： Six heavy metals (As, Cu, Cd, Zn, Cr, and Pb) in surface sediments (0-5 cm) from the twenty selected sites of the coastal Pearl Bay (South China Sea) were analyzed to assess the distribution pattern and potential ecological risk. Overall concentrations (mg/kg, dw) in the sediment samples were: As (10.88 +/- 6.50), Cu (24.16 +/- 18.63), Cd (0.55 +/- 0.78), Zn (48.53 +/- 30.06), Cr (35.78 +/- 28.66), Pb (31.28 +/- 18.50). Results showed that the overall mean values of Cd concentrations exceeded the standard of China Marine Sediment Quality, caused by significantly high levels of Cd contents in five sites (S8, S11, S13, S16, and S17) at the offshore area of Pearl Bay. Generally, the metal concentrations showed a decreasing trend from the offshore area to the inner bay. Various index values such as the geo-accumulation index (I-geo), the ecological risk index (E-ri), and the contamination factor (CF) demonstrated that the coastal Pearl Bay was not polluted by the examined metals except for Cd, which might cause contamination and ecological risk in the region. Principal component analysis (PCA) results indicated that Cu, Zn, and Cr might originate from natural sources inland, and Pb and As might come from the gasoline and diesel fuel from engine boats. It is recommended that further research should focus on detecting the acute source and transferring mechanisms of the toxic metal Cd.

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