Abstract:Based on the concentration of As, Cu, Cd, Cr, Co, Hg, Ni, Pb, V and Zn in sediment samples taken from 138 stations in Eastern Bohai Sea and Northern Yellow Sea, the distribution characteristics and controlling factors of heavy metals in marine sediment were studied. The average concentration of As, Cu, Cd, Cr, Co, Hg, Ni, Pb, V and Zn were 9.87, 20.1, 0.15, 58.9, 11.6, 0.02, 26.7, 23.0, 74.0 and 65.5 μg/g, respectively. Contents of Cu, V, Cr, Co, Ni and Zn showed a significantly positive correlation between organic carbon contents and the amount of fine-grained sediments (<63 μm) and its distribution in surface sediments was controlled obviously by the contents of organic matters and sediment grain sizes while As and Hg distribution was not significantly affected by the contents of organic matters and particle sizes of sediment. Enrichment factors (EF) were calculated to determine whether the observed concentration was higher than background levels. Three groups of elements: (1) Cr, Co, Ni, Pb, V and Zn were at background concentrations; (2) Cu was slightly enriched; and (3) As, Cd and Hg were moderately enriched. According to the Q-type cluster analysis, characteristics of the sediment in the study area could be divided into three different zones of heavy metal distribution. Class Ⅰ featured high Hg enriched sediment; As of Class II region was higher degree of enrichment; Class III region was higher for all heavy metal elements, especially Cu, Zn and Cd.
蓝先洪, 蜜蓓蓓, 李日辉, 秦亚超, 王中波, 陆凯. 渤海东部和黄海北部沉积物中重金属分布特征[J]. 中国环境科学, 2014, 34(10): 2660-2668.
蓝Xian-Hong , MI Bei-Bei, LI Ri-Hui, QIN Ya-Chao, WANG Zhong-Bo, LU Kai. Distribution of heavy metals in surface sediments in the eastern Bohai Sea and the northern Yellow Sea. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(10): 2660-2668.