Surfactant enhanced remediation (SER) is a promising technology for the removal of hydrophobic organic compounds (HOCs) from contaminated soils. Recycling of soil washing effluent by selective removing of HOCs from surfactant solutions, using techniques such as sorption, is a keyway to reduce the operation costs of SER. In this study, a potential and economical method to recycle washing effluent and lower operation costs of SER, i.e., selective sorption of phenanthrene from an anionic surfactant (sodium dodecylbenzene sulfonate, SDBS) or a nonionic surfactant (Triton X-100, TX100) solution by a resin, SP850, was developed. A modified selectivity parameter (S*), having a parabolic equation with a maximum S* value, was developed to evaluate the efficiency of the selective sorption process, the optimal surfactant concentration and SP850 dose for SER. For example, at the given SP850 dose of 1.0 g/L, the optimal concentrations of SDBS and TX100 for SER are about 15000 mg/L and 8000 mg/L, respectively. Moreover, the optimal added SP850 dose for recycling washing effluents is 1.5 g/L, which is independent of surfactant concentration. At the relatively high concentrations of surfactant used in SER, the selective sorption is depended on the sorption of phenanthrene by SP850 and the solubility enhancement of phenanthrene into surfactant micelles in solutions. The observed recycling soil washing effluent method by selective sorption using resins (e.g., SP850) as the adsorbents would be helpful for the application of SER in remediating contaminated soils.

表面活性剂强化修复（SER）是一种从污染土壤中去除疏水性有机化合物（HOC）的有前途的技术。通过使用吸附等技术从表面活性剂溶液中选择性去除HOC来回收土壤洗涤废水是降低SER运营成本的关键途径。在这项研究中，一种回收洗涤废水并降低SER成本的潜在且经济的方法，即从阴离子表面活性剂（十二烷基苯磺酸钠，SDBS）或非离子表面活性剂（Triton X-100，TX100）溶液中选择性吸附菲由树脂SP850开发而成。修正的选择性参数（S *），具有最大S的抛物线方程*值用于评估选择性吸附过程的效率，SER的最佳表面活性剂浓度和SP850剂量。例如，在给定的SP850剂量1.0 g / L时，SER的SDBS和TX100的最佳浓度分别约为15000 mg / L和8000 mg / L。此外，用于回收洗涤废水的最佳SP850添加剂量为1.5 g / L，这与表面活性剂浓度无关。在SER中使用相对较高浓度的表面活性剂时，选择性吸附取决于SP850对菲的吸附以及菲在溶液中对表面活性剂胶束的溶解度的提高。观察到的通过使用树脂（例如SP850）作为吸附剂的选择性吸附进行的回收土壤洗涤废水方法，将有助于SER在修复污染土壤中的应用。