研究了阴离子表面活性剂十二烷基苯磺酸钠(LAS)对PAHs在士壤中吸附行为的影响。结果表明,LAS改变了PAHs在土水体系中的吸附/解吸平衡,吸附态LAS可提高土壤对PAHs的吸附,而溶解态LAS则增加了PAHs的表观溶解度,这2种作用的综合结果改变了PAHs在土水体系中的吸附系数。凶此,文中用表观吸附系数来描述PAHs在土壤-水-LAS体系中的综合吸附行为。
Anion surfactant sodium dodecylbenzene sulfonate(LAS) was used to study its effect on PAHs sorption on soil. LAS affects the PAHs sorption behavior on soil. Adsorbed LAS increases the amount of adsorptive PAHs while the dissolved LAS increased the apparent solubility of PAHs. These two processes influence the value of PAHs sorption coefficient in soil-water system,which can be depicted by apparent sorption coefficient in this study.