期刊论文

Extraction of Heavy Metals in Contaminated Soils with Two Surfactants

中文

农业环境科学学报

1672-2043

2006

25

S1

248-250

10.3321/j.issn:1672-2043.2006.z1.060

教育部重点项目(教技司156-00209) 湖南农业大学科技创新基金(04PT02)

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选取2种非离子型表面活性剂Tween80和TritonX-100,设定0.5%、1.0%、3.0%、5.0%不同浓度和4.0、6.8、8.0、10.0不同pH值,对受重金属污染的土壤进行萃取试验。结果表明:Tween80溶液的浓度越高,pH值越低,对重金属的萃取效果越好,对重金属的萃取能力大小顺序为Cu>Cd>Zn>Pb;TritonX-100溶液的浓度越低,pH值越低,对重金属去除效果越好,对重金属的萃取能力大小顺序为Cu>Pb>Zn>Cd。2种表面活性剂相比较,Tween80对Cu和Cd的萃取效果比TritonX-100的萃取效果好;TritonX-100对Pb的萃取效果比Tween80的萃取效果好。Tween80和TritonX-1002种表面活性剂对重金属的萃取效率都偏低,用于重金属污染土壤修复不大可行...

In order to investigate extracting efficiency of two non-ionic surfactants(Tween80 and TritonX-100) to heavy metals in contaminated soils,a batch experiment was conducted.The results indicated that Tween80 solution with higher concentration and lower pH had better extracting efficiency.The extracting efficiency of Tween80 to the heavy metals was discovered to be in an order: Cu>Cd>Zn>Pb.The lower of the concentration and pH for TritonX-100,the better extracting efficiency to heavy metals was.If identical concentration and pH value for the extratants,the extracting efficiency of Tween80 to Cu a...