Zhuang Haihai, Xu Shaohui, Gao Maosheng, Zhang Jia, Hou Guohua, Liu Sen, Huang Xueyong
College of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, China.
Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China.
Bull Environ Contam Toxicol. 2018 Oct;101(4):473-478. doi: 10.1007/s00128-018-2439-9. Epub 2018 Sep 12.
The particle size distribution characteristics of sediments and the concentrations of heavy metals in Jiaozhou Bay were investigated in this study. The average concentrations of Cu, Pb, Zn, Cr, Cd, Hg and As were 36.88, 29.60, 82.08, 77.48, 0.083, 0.048 and 11.00 mg/kg, respectively. The heavy metal concentrations were highest in the eastern sediments, followed by those at the top of the bay, and the lowest concentrations were observed in the central region. Overall, a decreasing trend from the center of the bay to the periphery was observed. Additionally, the distribution of heavy metals in sediments was not completely controlled by sediment particle size. The degree of heavy metal contamination was evaluated using the geoaccumulation index and Hakanson's method. The results revealed that the level of heavy metal pollution in the sediments was relatively low and that the main pollution elements were Cu and Hg. In addition, the sediments are associated with various levels of potential ecological risk due to the high pollution levels of Hg and Cd.
本研究调查了胶州湾沉积物的粒度分布特征和重金属含量。铜、铅、锌、铬、镉、汞和砷的平均含量分别为36.88、29.60、82.08、77.48、0.083、0.048和11.00毫克/千克。东部沉积物中的重金属含量最高，其次是湾顶，中部地区的含量最低。总体而言，从湾中心到周边呈现出下降趋势。此外，沉积物中重金属的分布并不完全受沉积物粒度的控制。采用地累积指数和哈坎松方法对重金属污染程度进行了评价。结果表明，沉积物中的重金属污染水平相对较低，主要污染元素为铜和汞。此外，由于汞和镉的高污染水平，沉积物存在不同程度的潜在生态风险。
