福建闽江河口湿地土壤重金属污染特征及评价研究

为掌握福建闽江河口湿地重金属污染特征,对闽江河口湿地不同监测点重金属污染状况进行全面调查采样,利用综合污染指数法和地累积指数法对重金属污染状况进行评价.结果表明,福建闽江河口湿地重金属污染比较严重,除Ni和Cr外,Cu、Pb、Zn、Cd、Mn均超过土壤环境质量标准(I级).除Ni和Cr单项污染指数无污染外,其他监测点均有不同程度的重金属污染,污染程度表现为Pb>Cu>Zn>Cd;综合污染指数除潭头港和鳝鱼滩为轻度污染,其他6个监测点均达到中度污染以上,表明闽江河口湿地存在严重的重金属复合污染.地累积指数除Pb、Zn、Cd污染达到中或轻度污染水平,其他重金属均无污染.

Heavy Metals Pollution and It's Assessment in the Wetlands of Min River Estuary in Fujian Province

The pollution characteristics of heavy metal in the estuary wetland of Min River in Fujian Province was thoroughly investigated and the contents of Cu, Pb, Zn, Cd, Mn, Ni and Cr from 8 monitoring sites were analyzed. And then the heavy metal pollution in the estuary wetland of Min River was evaluated by the method of N. L. Nemerow Comprehensive Pollution Index and Geoaccumulation Index. The results showed that the heavy metal pollution was serious in the estuary wetland of Min River. The contents of Cu, Pb, Zn, Cd and Mn exceeded the Standard of China National Soil Environment Quality Standard (level I) except Ni and Cr. The Single Pollution Index Assessment showed that the estuary wetland of Min River exist Cu, Pb, Zn, Cd and Mn pollution in different extents and no Ni and Cr pollution. The pollution degree of different heavy metals was in sequence of Pb>Cu>Zn>Cd. The Comprehensive Pollution Index Assessment showed that Tan-tou-gang and Shan-yu-tan existed slight pollution and the other monitoring sites were belonged to moderate pollution, which indicated there was serious comprehensive pollution in the estuary wetland of Min River. The Ceoaccumulation Index Assessment showed that the Pb, Zn and Cd were belong to moderate or slight polution level, and there were no Cu, Mn, Ni and Cr pollution.