芝罘湾近期沉积物中重金属元素记录

通过测定沉积物柱状样中重金属含量,结合210Pb测年资料,高分辨率地研究了芝罘湾近年来的重金属污染历史。结果表明:芝罘湾海域以Cd,Pb,Zn等3种重金属元素的污染状况最为严重,且是多年富集趋势;Hg元素污染程度近年来有上升趋势;芝罘湾重金属污染分3个阶段:1997年以前为污染呈持续增高阶段,1998为截污下降阶段,1999年以来为快速增高阶段。城市陆源污染物排放、港口建设和船舶排污对芝罘湾的环境变化有巨大影响。芝罘湾海域水动力条件较弱,不利于污染物质扩散,更需重视强化保护湾内水质工作。

Records of Heavy Metals in the Sediments of Zhifu Bay in Recent Years

The concentrations heavy metals of in the marine sediment cores from ZhiFu Bay were measured.Combined with the 210Pb dating results,the contamination history of heavy metals was studied using high resolution records.The results indicated that the concentrations of Cd,Pb and Zn were enriched in Zhifu Bay during the past years.The input of Hg was unstable,and Hg showed an ascending trend in concentration in recent years.The heavy metal pollution in this area can be divided into three stages.The contents of heavy metals increased slowly before 1997,decreased in 1998,and increased rapidly since 1999.Pollutants from nearby cities,construction of ports,ship waste etc influence the environment of Zhifu Bay sverely.The hydrodynamic force in Zhifu Bay is relatively weak,as a result the pollutants diffuse slowly.Hence close attention has to be paid to the water quality in Zhifu Bay.