【作者】 张永； 廖柏寒； 曾清如； 曾敏； 龚建宇；

【Author】 ZHANG Yong1, LIAO Bo-han2, ZENG Qing-ru2, ZENG Min1, GONG Jian-yu2 (1. College of Biological Sciences and Technology, Hunan Agricultural University; 2. College of Resources and Enviroment, Hunan Agricultural University, Changsha 410128, China)

【机构】 湖南农业大学生物科学技术学院； 湖南农业大学资源环境学院；

【摘要】 选取了两种非离子型表面活性剂Tween80和TritonX-100,设定0.5%、1.0%、3.0%、5.0%四种不同浓度和4.0、6.8、8.0、10.0四个不同的pH值,对受重金属污染的土壤进行萃取试验。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。两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-100两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。更多还原

【Abstract】 In order to investigate extracted effect 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 extracted effects, the extracted effects of Tween80 to the heavy metals were Cu>Cd>Zn>Pb. The concentration and pH were lower, the extracted effects of TritonX-100 to heavy metals were better. If the extratants have same concentration and pH value, the extracted effect of Tween80 to Cu and Cd are stronger than TritonX-100, the extracted effect to Pb and Zn is less than TritonX-100. Because extrated efficiency of these two surfactants were lower, they were not good extractants to removal heavy metals in soils.更多还原