比较两种表面活性剂淋洗去除土壤中的重金属

发布时间：2018-08-07 16:13

【摘要】：以停车场和湿地2种土壤为研究对象,分别使用表面活性剂鼠李糖脂和月桂基醚硫酸钠对土壤样品进行淋洗,考察2种表面活性剂对这2种土壤中重金属的去除能力差异及形态分布的影响,并分析淋洗后残留在土壤中表面活性剂的生物毒性。结果表明,2种表面活性剂均可在一定程度上去除2种土壤中的Cu、Cd、Pb和Zn。与湿地土壤相比,2种表面活性剂对停车场土壤中重金属的去除率均较高,且月桂基醚硫酸钠的去除能力优于鼠李糖脂。2种表面活性剂对可交换态重金属的去除效果最好,对残渣态重金属去除率较低。淋洗后2种土样中残留的鼠李糖脂及停车场土样中残留的月桂基醚硫酸钠的生物毒性低,湿地土壤中残留的月桂基醚硫酸钠具有一定生物毒性。
[Abstract]:Soil samples were eluted by surfactant rhamnolipid and sodium lauryl ether sulfate in parking lot and wetland, respectively. The effects of two surfactants on the removal ability and speciation distribution of heavy metals in these two soils were investigated, and the biotoxicity of residual surfactants in soils after elution was analyzed. The results showed that the two surfactants could remove Cu ~ (2 +) CD ~ (2 +) Pb and Zn in two soils to some extent. Compared with the wetland soil, the removal rate of heavy metals in parking lot soil by two surfactants was higher, and the removal capacity of sodium lauryl ether sulfate was better than that of rhamnolipid. 2 surfactants had the best removal effect on exchangeable heavy metals. The removal rate of residual heavy metals is low. The residual rhamnolipid in the two soil samples and the residual sodium lauryl ether sulfate in the parking lot were low in biotoxicity, and the residual sodium lauryl ether sulfate in the wetland soil had certain biological toxicity.
【作者单位】：北京工商大学环境科学与工程系;威立雅(中国)环境服务有限公司;
【基金】：北京市优秀人才青年骨干个人项目(2016000020124G024) 北京工商大学青年教师科研启动基金资助项目(QNJJ2015-12) 2016年北京高等学校高水平人才交叉培养“实培计划”大学生科研训练计划深化项目
【分类号】：X53

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