几种植物处理含重金属废水的适应性研究

试验采用蕹菜、油菜、美人蕉、水葫芦、水花生、水浮莲6种适应人工湿地的植物，在水培情况下研究了它们对Hg、Cd、Pb、Cr、Cu、Zn6种重金属的适应性，以综合考虑了植物的适水性与对重金属耐性的生物量为指标，得出了植物对6种重金属模拟废水综合耐性由强到弱的排序为美人蕉→水葫芦→油菜→水浮莲→蕹菜→水花生。不同植物对于其中一种重金属的单一耐性也有差异，美人蕉对Cr、Hg、Zn耐性较强，水浮莲对Pb、Cu、Cd耐性较强。植物对重金属的综合耐性和单一耐性的试验结果可为湿地处理含重金属废水提供参考。

Adaptability of several plant to heavy metal wastewater treatment

Using 6 plant species: Ipbmoea aqualica, Brassica juntica, Canna india, Eichhornia crassipes, Alternanthera philoxer- oides and Pistia stratiotes, their complex adaptability to 6 heavy metal species (Hg, Cd, Pb, Cr, Cu, Zn) was studied under the condi- tion of hydroponics to initiate artificially wetland. The biomass was caculated as index which was considered the adaptability of plant to water and heavy metals. The result showed that the adaptability of plant to simulated wastewater was Canna india > Eichhornia crassipes > Brassica juntica > Pistia stratiotes > Ipbmoea aqualica > Alternanthera philoxeroides. Canna india showed the most tolerant to Cr, Hg, Zn and Pistia stratiotes to Pb, Cu ,Cd. The above result was benefit for artificially wetland in treating heavy metal wastewater.