摘要
根据长江口洋山海域表层沉积物监测资料,利用变异系数法和富积系数法,对表层沉积物中重金属的空间波动程度及富积程度进行了分析,并采用Hakanson潜在生态危害指数法对其潜在生态危害程度进行了评价。结果表明:在表层沉积物所监测的重金属中,Pb元素的空间波动程度最高,其它重金属元素的空间波动程度较低,各重金属空间波动程度的顺序依次为Pb>Cd>Hg>Cu>Cr>As>Zn;沉积物中Cu元素的富积程度最高,Pb元素次之,其它重金属元素的富积程度较低,各重金属富积程度的顺序依次为Cu>Pb>Zn>As>Cr>Cd>Hg。潜在生态危害评价结果显示:洋山海域表层沉积物中的重金属对海洋生态系统的潜在生态危害较轻微,均属于轻微潜在生态危害程度,其轻微潜在生态危害程度顺序为Cu>As>Hg>Pb>Cd>Cr>Zn。
Based on the monitoring data of surface sediments from the Sea Region of Yangshan in the Yangtze Estuary, the degree in spatial fluctuation and accumulation of heavy metals was analyzed by using the method of variation coefficients and accumulation coefficients. The method of potential ecological risk indices presented by Lar Hakanson was used to assess the potential ecological risk of heavy metals. The degree of Hg spatial fluctuation appears to be the highest and other heavy metals being rather lower in surface sediments, with the order of fluctuation degree ranging as the following： Pb 〉 Cd 〉 Hg 〉 Cu 〉 Cr〉As 〉 Zn. The degree of Cu accumulation appears to be the highest among all heavy metals analyzed in surface sediments, with Pb being the second, and others lower. The order of the accumulation degree of these heavy metals is as： Cu 〉 Pb 〉 Zn 〉 As 〉 Cr 〉 Cd 〉 Hg. The assessment of potential ecological risk revealed that the potential ecological risk of these heavy metals to the ocean ecology system is very light, which belongs to light potential ecological risk level , with the order of light potential ecological risk level of all these heavy metals ranging as： Cu〉As〉Hg〉Pb〉Cd〉Cr〉Zn.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2007年第3期351-356,共6页
Resources and Environment in the Yangtze Basin
基金
国家908评价专项(908-02-02-01)
上海市908评价专项(PJ2)
上海市教委项目(05DZ231)资助
关键词
洋山海域
表层沉积物
重金属
空间波动
富积程度
潜在生态危害
the Sea Region of Yangshan
surface sediments
heavy metals
spatial fluctuation
accumulation degree
potential ecological risk
