3种植物对Cd污染农田土壤的修复效果比较试验研究  

A comparative study on the performance of 3 plants for remediation of cadmium contaminated farmland soil

作　　者：韩少华[1] 黄沈发[1,2] 唐浩[2] 王敏[2] 吴健[2] 

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]上海市环境科学研究院,上海200233

出　　处：《环境污染与防治》2012年第12期22-25,30,共5页Environmental Pollution & Control

基　　金：国家公益性行业(农业)科研专项经费项目(No.200903056)

摘　　要：通过盆栽试验研究了3种植物三叶鬼针草(Bidens pilosa L.)、紫茉莉(Mirabilis Jalapa)、中华景天(Sedum polytrich-oides)对上海地区2种质量浓度(1.2、12.0mg/kg)Cd污染农田土壤的修复效果,以探索其在上海地区Cd污染农田土壤修复中应用的可行性。结果表明:2种浓度下,三叶鬼针草对土壤Cd去除效果均最佳,1.2mg/kg处理下盆中土壤Cd质量浓度由原来的1.249 9mg/kg下降到0.861 7mg/kg,降低0.388 2mg/kg,Cd去除率为31.06%;12.0mg/kg处理下三叶鬼针草盆中土壤Cd质量浓度由原来的12.033 2mg/kg下降到10.020 6mg/kg,降低2.012 6mg/kg,Cd去除率为16.73%;紫茉莉和中华景天相比较而言,修复效果均较差。在2种浓度下,3种植物地上部分生物量排序均为三叶鬼针草>中华景天>紫茉莉。因此,建议将三叶鬼针草作为上海地区Cd污染农田土壤修复的优选植物。Series of pot experiments were conducted to remediate cadmium contaminated farmland soil by 3 spe cies of plants （Bidens pilosa L. , Mirabilis Jalapa and Sedum polytriehoides）. Two levels cadmium stress of 1.2 mg/kg and 12.0 mg/kg were set in experiments. The feasibility of 3 plants for remediation the cadmium contaminated soil in Shanghai area was discussed. Results showed that Bidens pilosa L. presented best performance of cadmium re-moval under both level of cadmium stress. Under low cadmium stress, the cadmium concentration in pot of Bidens pilosa L. felt from 1. 249 9 mg/kg to 0. 861 7 mg/kg, average cadmium removal was 0. 388 2 mg/kg given the Cd re-moval rate of 31.06%. Under high cadmium stress, the cadmium concentration in soil fell from 12. 033 2 mg/kg to 10. 020 6 mg/kg, the average cadmium removal was 2. 012 6 mg/kg given the Cd removal rate of 16.73%. Compared with Bidens pilosa L. , the performance of Mirabilis Jalapa and Sedum polytrichoides for remediation of cadmium contaminated soil was relative poor. The aboveground biomass of 3 plants followed the order of Bidens pilosa L.〉 Sedum polytrichoides〉Mirabilis Jalapa. So, Bidens pilosa L. was recommended as optimized plant for repairing the cadmium contaminated farmland soils in Shanghai area.

关 键 词：CD 植物修复 三叶鬼针草 紫茉莉 中华景天 

分 类 号：X53[环境科学与工程—环境工程]