摘要
研究了控制阴阳极液pH值对Cd和Pb在土壤中动电过程的影响。结果表明,控制阴阳极液pH值明显改变了动电过程中的电流密度、电渗流量、土壤层pH值和Cd与Pb在土壤层的分配;显著增加了总Cd和Pb及其有效态的去除率,总Cd和Pb平均去除率分别为87%和51%,有效态Cd和Pb的平均去除率分别为97%和73%;与单元素Cd或Pb的动电效果对比,Cd的去除率上升,Pb的去除率下降。
We studied the effect of pH control in cathode and anode solution on cadmium and lead electrokinetic process in soil.The results showed that the adding of potassium hydroxide in anode solution and nitric acid in cathode changed markedly the current density,quantity of electroosmotic flow,pH in soil,cadmium and lead distribution in soil in the electrokinetic process.The pH control in cathode and anode solution incresed markedly the removal efficiencies of total Cd and Pb in soil.Their efficiencies were 87% and 51%,respectively.And the removal efficiencies of their availibilty were 97% and 73%,respectively.Compared to the removal of the single Cd or Pb electrokinetic in soil,best results for the removal efficiencies of total Cd were obtained,whereas the removal efficiencies of lead decreased.
出处
《亚热带农业研究》
2010年第4期254-260,共7页
Subtropical Agriculture Research
基金
福建省教育厅资助项目(JA03072)
关键词
动电过程
Cd和Pb
污染土壤
electrokinetic process
cadmium and lead
contaminated soil
