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《Journal of Marine Sciences》 2011-02
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Accumulation of heavy metals in the core sediments from the Jiaozhouwan Bay during last hundred years and its environmental significance

LI Feng-ye1,LI Xue-gang1,QI Jun1,2,SONG Jin-ming1(1.Key laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;2.Graduate School,Chinese Academy of Sciences,Beijing 100049,China)  
The 210Pb activity and the heavy metals of Zn,Cr,Cu,Pb,Cd,Co and Ni in corresponding sediment layers in the cores of B3,C2,C4,B6,D4 and D6 from the Jiaozhouwan Bay were measured,and the sedimentation rate and sedimentation environment in different region for the Jiaozhouwan Bay have been discussed.The sedimentation rate had significant difference among the middle,the east coast and the mouth of the Jiaozhouwan Bay with the average between 0.19 cm/a and 3.96 cm/a.According to exactly strata age determined by 210Pb,the background values of Zn,Cr,Cu,Pb,Cd,Co and Ni in every core sediment were determined.The accumulation rate of heavy metals in the Jiaozhouwan Bay during the last hundred years can be divided into three periods.The first period was characteristic of background value of heavy metals accumulation rate,which was before the time of the rapid development of industry and agriculture in Qingdao.And the main source of heavy metals was natural with relatively low sedimentation rate during that time.The second period was characteristic of quickly increasing accumulation rate of heavy metals,which was corresponded to the rapid development of industry and agriculture in Qingdao.During that time,Jiaozhouwan Bay had been subjected to various pollutants and led to the serious heavy metal pollution.Compared with the background value of heavy metal before industrial revolution in Jiaozhouwan Bay,the sediments had been polluted by heavy metal in that time.The third period was the time when the accumulation rate of heavy metals began to decrease due to the development of pollution control measures and continuous improvement of the environmental management system from 1980's.And the Jiaozhouwan Bay sedimentation environment began to improve in this period.The vertical distributions and accumulation of 210Pb,Zn,Cr,Cu,Pb,Cd,Co and Ni was controlled by sediment granularity,pollutant input and hydrodynamics in the Jiaozhouwan Bay.The distribution and accumulation rate of heavy metals in the core sediments can reflect clearly the change of sedimentation environment.
【Fund】: “973”计划资助项目(2007CB407305);; 国家基金委“创新研究群体科学基金”资助项目(40821004);; 海洋沉积与环境地质国家海洋局重点实验室开放基金资助项目(MASEG200606)
【CateGory Index】: X55
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