摘要
对厦门海域沉积物中Cu,Zn,Pb,Cd,Cr,Hg,As的全量进行了分析,同时采用BCR连续提取法对粉砂和粘土组分(小于63μm组分)中Cu,Zn,Pb,Cd,Cr进行了形态提取。探讨了重金属在各海域的分布特征及近25a来的含量变化,并采用Lars Hakanson指数法对重金属的潜在生态风险进行了评价。结果表明:粉砂和粘土组分中重金属含量大于沉积物中的总含量,沉积物平均粒径越大,差异越明显。25a来的统计资料分析显示,研究海域水体环境逐渐改善,沉积物中大多数重金属都处于历史较低水平。沉积物重金属潜在生态风险研究发现,沉积物中重金属的不同分析方法及背景值的选择标准对其潜在生态风险评价结果具有重要影响。
Contents of Cu, Zn, Pb, Cd, Cr, Hg, As in the sediments of the Xiamen sea area were analyzed, and each speciation of Cu, Zn, Pb, Cd, Cr in silt and clay （ 〈 63 μm component ） was extracted by sequential extraction of BCR. The distribution characteristics and contents variation in recent 25 years of heavy metals in each sea area were discussed, and the potential ecological hazards were assessed by using the Lars Hakanson Index Method. The results show that the contents of heavy metals in silt and clay are greater than the total content in full sediments, and the bigger the average grain size is, the more obvious the difference is. Data of recent 25 years indicated that now the contents of most metals in sediments are at the lowest level, and the environment of the studied sea area is improving. The analysis of potential ecological risks of heavy metals it is found that the risks are severe and moderate in the estuary of Jiulong River and the west harbor separately. The potential ecological risks index of Cd was relatively high, and its content in the Xiamen sea area, especially in the estuary of Jiulong River should be paid more attention to.
出处
《海洋通报》
CAS
CSCD
北大核心
2007年第1期67-72,共6页
Marine Science Bulletin
基金
中欧合作项目(INCO-CT-2004-510706)
厦门港航道扩建工程倾倒区选划项目
关键词
沉积物
重金属
形态分析
潜在生态风险
sediments
heavy metals
speciation analysis
potential ecological risks
