摘要
对南黄海近海海洋表层沉积物重金属Cu、Pb、Zn、Cd、Ni、Cr、As、Hg的含量和粒度进行了调查,分析了重金属的分布特征,探讨了沉积物重金属含量同粒度间的相关关系,并利用污染指数法和潜在生态风险指数法对调查海域沉积物重金属污染状况进行评价。结果表明:重金属的分布整体呈现近岸高于远海。相关性分析结果表明,除As、Hg外,其他6种元素来源相似。Cu、Cr部分站位超海洋沉积物质量一类标准,符合二类,其余重金属元素含量均低于一类标准。污染指数和潜在生态风险指数评价结果表明,南黄海近岸海域表层沉积物重金属90%站位达到中等污染水平,66.7%站位潜在生态风险轻微,30%站位潜在生态风险中等。
It is reported the concentrations of heavy metals Cu, Pb, Zn, Cd, Ni, Cr, As, Hg and grain size in the surface sediments in offshore area of SYS （South Yellow Sea）, the distributed characteristics of these heavy metals were analyzed, the correlation between the contents of these heavy metals and grain sizes were discussed, in addition, the methods of pollution indexes and potential ecological risk in- dexes were used to assess the pollution level and potential harmful effects of heavy metals. The results indicated that the contents of these heavy metals gradually decreased from the offshore area to the open sea area. In survey area, each element had similar pollution sources except As, Hg. The contents of Cu, Cr in some sites exceeded the first class of GB18668-2002, showing low to the second class, the others were lower than the first class. The results of pollution indexes and potential ecological risk in- dexes revealed that 90% of positions were in a moderate degree of contamination, while 66.7% showed slight ecological risk, 30% reached a moderate level of ecological risk.
出处
《海洋湖沼通报》
CSCD
北大核心
2013年第4期101-110,共10页
Transactions of Oceanology and Limnology
基金
青岛市科技发展计划(08-1-7-zhy
07-2-1-24nsh)资助
关键词
南黄海近岸海域
表层沉积物
重金属
分布特征
潜在生态风险评价
offshore area of SYS
surface sediments
heavy metals
distribution
potential ecological risk assessment
作者简介
吕利云（1987-），女，河南安阳人，硕士研究生，主要从事海洋生态学研究，Tel：1876629758l；E-mail：fengxing2002@163．com
通讯作者：董树刚，教授，主要从事海洋环境监测和浮游植物学研究．Tel：053282032342，E-mail：dongshg112@163．com
