CAJ | 학술논문

根据2000—2007年深圳近海海域表层沉积物的基础监测资料,采用地累积指数和潜在生态危害指数两种评价方法,对该区域沉积物中重金属的污染状况进行了分析和研究.结果表明,深圳近海海域沉积环境在一定程度上已受到了重金属的污染,除固戍近海外,大部分海域基本上为Ⅱ类沉积物,其污染程度大小顺序为:同戍近海>深圳湾中>深圳湾口>沙头角湾口.其中沉积物中Cu和Zn超标严重,固戍近海沉积物中Cu和Zn平均含量分别为128.96mg·kg~(-1)和199.40mg·kg~(-1),为Ⅲ类沉积物.研究还表明,深圳近海海域基本上不存在重金属潜在的生态危害,7种重金属潜在的生态危害大小顺序为:Hg>Cd>Cu>As>Pb>Cr>Zn.
근거2000—2007년심수근해해역표층침적물적기출감측자료,채용지루적지수화잠재생태위해지수량충평개방법,대해구역침적물중중금속적오염상황진행료분석화연구.결과표명,심수근해해역침적배경재일정정도상이수도료중금속적오염,제고수근해외,대부분해역기본상위Ⅱ류침적물,기오염정도대소순서위:동수근해>심수만중>심수만구>사두각만구.기중침적물중Cu화Zn초표엄중,고수근해침적물중Cu화Zn평균함량분별위128.96mg·kg~(-1)화199.40mg·kg~(-1),위Ⅲ류침적물.연구환표명,심수근해해역기본상불존재중금속잠재적생태위해,7충중금속잠재적생태위해대소순서위:Hg>Cd>Cu>As>Pb>Cr>Zn.
Based on the field data of Shenzhen coastal surface sediments from 2000-2007,methods of geo-accumulation index and potential ecological risk index are employed to evaluate heavy-metal pollution status in the area.Results show that Shenzhen coastal sediments have been polluted by heavy metals.The quality degree of most coastal sediments are Class Ⅱ except for the Gushu Coast.The severity of heavy-metal pollution is:the Gushu Coast,the middle of the Shenzhen Bay,the mouth of the Shenzhen Bay,followed by the mouth of the Shatoujiao Bay that is least polluted.Among heavy metals found in the sediments,Cu and Zn are the two most seriously-polluting elements.The average contents of Cu and Zn in Gushu coastal sediments are 128.96mg·kg~(-1) and 199.40mg.kg~(-1),belonging to Class Ⅲ;other coastal areas of Shenzhen belong tO Class Ⅱ.The results also reveal that there are no potential ecological risks for Shenzhen coastal sediments.The order of potential ecological risks is,Hg>Cd>Ca>As>Pb>Cr>Zn.