EDTA对Cd及Cd-Mn复合污染处理下藜生长的影响

Effects of EDTA on Cd and Cd-Mn Compound Pollution Soil of Growth with Chenopodium Album

采用盆栽实验方法,研究了在Cd及Cd-Mn复合污染土壤中添加EDTA对藜生长的影响以及对Cd的转运和富集作用.结果表明:单一Cd污染处理下最佳的EDTA添加水平为2.5mmol.kg-1,Cd-Mn复合污染处理下EDTA的添加水平为5.0mmol.kg-1,这时EDTA可以促进藜地下部分的重金属元素向地上部分迁移,藜地上部分含Cd量分别是对照值的1.8倍、3.7倍,同时对Cd的富集系数也有明显提高.

Pot experiments were carried out to make the study of the effect of EDTA on Cd and Cd-Mn compound pollu- tion soil of growth with Chenopodium album. The results indicate that., with 2.5 mmol·kg-1 EDTA on the Cd contaminated soil and 5.0 mmol·kg-1 EDTA on the Cd-Mn compound pollution soil is the best repairing efficient. This case makes that under the Cd processing and Cd-Mn processing of Chenopodium album aerial parts Cd content to enhance 1.8 times, 3.7 times compares to the comparison. At the same time, the enrichment factors of Cd also have been improved drstinctively.