皂河湿地植物对多种重金属污染湿地的修复研究

PHYTOREMEDIATION ON WETLAND IN ZAOHE RIVER WATERSHED CONTAMINATED WITH MULTI HEAVY MATELS

通过测定皂河湿地香蒲、芦苇、黑麦草和基质中Cd、Cr、Cu、Ni、Pb、Zn的浓度,分析植物对受6种重金属污染湿地的修复能力。结果表明:芦苇具有较高的重金属综合富集能力,香蒲具有较高的重金属综合转移能力;聚类分析表明:芦苇湿地受重金属污染程度最小。皮尔森相关性表明:Cd,Pb在香蒲与基质中呈极显著正相关(P<0.01);Cd、Cu、Pb分别在芦苇与基质中呈显著正相关(P<0.05);Cr、Cu、Zn分别在黑麦草与基质中呈显著正相关(P<0.05)。这表明可用植物指示湿地基质受重金属的污染程度。

This study investigated the phytoremediation effect on wetland contaminated with multi-heavy metals by cattail,reed,and ryegrass,by determining the concentrations of Cd,Cr,Cu,Ni,Pb,and Zn in these plants and the sediment. The results showed that,reed had a higher comprehensive accumulating ability,whereas cattail owned a higher comprehensive transfer ability on the six heavy metals. Cluster analysis suggested that the degree of pollution in reed wetland was lower than the other wetlands. Pearson ＇s correlation showed a significant correlation（ P 0. 01） between cattail and sediment concentrations for Cd and Pb. There was a significant correlations between reed and sediment concentrations of Cd,Cu and Pb,meanwhile,between ryegrass and sediment concentrations of Cr,Cu and Zn. The result showed that the degree of pollution in wetland sediment could be indicated by the plants.