表面活性剂强化土壤中PCBs的解吸研究

目的]为研究表面活性剂对PCBs的解吸效果的强化提供理论依据。方法]通过研究十二烷基苯磺酸钠（SDBS）、Tween 80和十六烷基三甲基溴化铵（HTAB）三种表面活性剂对土壤中多氯联苯（PCBs）解吸效果及其本身在水和土壤中的分配,并分析了表面活性剂在水和土壤中的定量分配对PCBs的解吸行为的影响。结果]单种表面活性剂对PCBs的解吸效果的强化作用为：Tween 80〉SDBS〉HTAB;3种表面活性剂在土壤上都有较大的吸附,吸附作用大小为：HTAB〉Tween 80〉SDBS;表面活性剂对PCBs解吸效果的强化作用主要由表面活性剂水相胶束浓度贡献,且PCBs的解吸率同水相胶束浓度正线性相关。结论]得到了3种表面活性剂对土壤中的PCBs的解吸效果的强化作用,为进一步分析提供了理论依据。

Study on Enhancement of PCBs Desorption in Soil by Surfactants

Objective] The aim was to provide the theoretical basis for study on enhancement of surfactants to desorption of PCBs.Method] The desorption effects of surfactants SDBs,Tween 80,HTAB on PCBs were studied as well as their distribution in water and soil.Effects of rationing on desorption of PCBs were also analyzed.Result] The potential of single surfactant to enhance the desorption of PCBs from soil in order was Tween 80> SDBS> HTAB.Three surfactants were largely adsorbed on soil and the sorption followed HTAB>Tween 80>SDBS.The desorption of PCBs increased significantly and linearly with the increase of aqueous micelle concentration of surfactants.Conclusion] Enhancing effect of three surfactants on PCBs desorption were obtained,which will provide theoretical basis for futher analyzing.