洪泽湖溧河洼水生植物体内重金属调查

对洪泽湖溧河洼区域的水生植物进行了Cu、Zn、Pb、Cr和Cd等重金属元素的污染调查与监测分析,结果表明:水生植物对重金属元素的吸收与积累反映了环境中的重金属污染水平,不同水生植物对各种重金属元素的吸收富集状况具有相对一致性,即Zn>Cu>Cr>Pb>Cd。水生植物对各种重金属元素的平均富集系数大小顺序为:Cd>Cu>Zn>Cr>Pb,这与各元素迁移性强弱的顺序也是相一致的,Cd、Cu、Zn等各元素较易为植物所吸收,而Pb的移动性较差。大部分水生植物根部的重金属含量比茎叶部分高。研究表明:可以从中筛选出具有高富集作用的植物,作为修复水体或土壤重金属污染的实验植物,为植物修复作用的研究提供参考。

Survey of heavy metals in aquatic plant body of Li He

In this article we conducted the survey and monitoring analysis for the pollution of Cu, Zn, Cd and Pb, Cr on the a- quatic plants in lihewa in Hongze Lake. Results indicate that the absorption and accumulation of heavy metals of the aquatic plants reflect the levels of heavy metal pollution in the environment and the enrichment situation of different aquatic plants absorbing heavy metals is relatively consistent, that is, Zn 〉 Cu 〉 Cr 〉 Pb 〉 Cd. The order of average coefficient of concentration for heavy metals of aquatic plants is Cd 〉 Cu 〉 Zn 〉 Cr 〉 Pb, and it is consistent with the order of migratory for the heavy metals, that is, Cd, Cu, Zn, and other elements are more easily absorbed by the plant, however, Pb has poor mobility. The content of heavy metalsis higher in roots than in stems and leaves. Studies have shown that you can select the plants with good function of metal-enrichment as the experiment plant for water restoration and soil metal pollution which can also offer references for the phytoremediation studies.