中国辽东湾过去一百年中重金属积累的趋势与程度。
The trend and extent of heavy metal accumulation over last one hundred years in the Liaodong Bay, China.
作者信息
Xu Bing, Yang Xiaobo, Gu Zhaoyan, Zhang Yanhui, Chen Yongfu, Lv Yanwu
机构信息
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China.
出版信息
Chemosphere. 2009 Apr;75(4):442-6. doi: 10.1016/j.chemosphere.2008.12.067. Epub 2009 Feb 7.
An integrated analysis has been carried out on two cores dated by combination of (210)Pb and (137)Cs in order to characterize the extent of heavy metal accumulation in the Liaodong Bay, Northern China. The concentrations and burial fluxes of Zn, Pb, Cd, and Hg increased abruptly after late 1970s. The enrichment factors of Cd, Hg, Zn and Pb are more than 30, 10, 7, and 3.5, respectively, in the surface sediments. Coincident to the increase of heavy metal contents, the decreasing trend of (206)Pb/(207)Pb ratio indicated lead in the surface sediments mainly come from anthropogenic activities.
为了确定中国北方辽东湾重金属积累的程度，对通过结合（210）Pb和（137）Cs测定年代的两个岩芯进行了综合分析。20世纪70年代后期之后，锌、铅、镉和汞的浓度及埋藏通量急剧增加。表层沉积物中镉、汞、锌和铅的富集系数分别超过30、10、7和3.5。与重金属含量增加相一致，（206）Pb/（207）Pb比值的下降趋势表明表层沉积物中的铅主要来自人为活动。
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