CAJ | 학술논문

为探讨植物在土壤重金属污染修复方面的作用，以重庆市郊某蔬菜基地的农田土为试验土壤，研究 Pb、Cd、Hg 单一污染及 Pb＋Cd、Pb＋Hg 复合污染情况下，苎麻吸收、富集及转运相应重金属的能力。结果表明，在单一重金属污染时，苎麻各部位积累的重金属浓度为根＞茎＞叶，对单一重金属的富集效果为 Pb＞Cd＞Hg，转运能力为 Hg＞Pb＞Cd；在 Pb、Cd 复合污染时，土壤中（Pb＋Cd）浓度较小时，苎麻主动吸收占主导，土壤中（Pb＋Cd）浓度较大时，苎麻被动吸收占主导；在 Pb、Hg 复合污染时，Hg 抑制了苎麻地下部分对 Pb 的吸收，同时抑制了 Pb 从根部向地上部分的转移。
위탐토식물재토양중금속오염수복방면적작용，이중경시교모소채기지적농전토위시험토양，연구 Pb、Cd、Hg 단일오염급 Pb＋Cd、Pb＋Hg 복합오염정황하，저마흡수、부집급전운상응중금속적능력。결과표명，재단일중금속오염시，저마각부위적루적중금속농도위근＞경＞협，대단일중금속적부집효과위 Pb＞Cd＞Hg，전운능력위 Hg＞Pb＞Cd；재 Pb、Cd 복합오염시，토양중（Pb＋Cd）농도교소시，저마주동흡수점주도，토양중（Pb＋Cd）농도교대시，저마피동흡수점주도；재 Pb、Hg 복합오염시，Hg 억제료저마지하부분대 Pb 적흡수，동시억제료 Pb 종근부향지상부분적전이。
In order to probe into the phytoremediation effect of plant on heavy metal pollution,the authors took the farmland at a vegetable base in suburb of Chongqing as experimental soil to research the ability to absorb,accumulate and transfer related heavy metals in the condition with simple pollution of Pb,Cd and Hg and the complicated condition with compound pollution of Pb + Cd and Pb + Hg.The results showed that in simple heavy metal polluted condition,the concentration of heavy metal accumulated at every part of B.nivea was root>stem >leaves,with accumulation effect of single heavy metal Pb>Cd>Hg,and transfer ability Hg>Pb>Cd;in the condition with compound pollution of Pb and Cd,when (Pb+Cd)concentration was less,the positive absorption played the leading role,and when(Pb+ Cd) concentration was more,passive absorption played the leading role;in the condition with compound pollution of Pb and Hg,Hg restricted underground part of B.nivea to absorb Pb,and meanwhile restrict the Pb to be transferred from root to over-ground area.