A method for the remediation of polycyclic aromatic hydrocarbons (PAHs) contaminated soils was proposed involving a combination of surfactant-aided soil washing and chemical oxidation by activated persulfate (SP). In this study, Triton X-100 (TX-100) and SP was applied to the soil, either concurrently or sequentially. Results indicated that surfactant followed by amendment with a solution of SP, TX-100 + SP(l), was most effective in decreasing PAHs concentrations in a sandy loam soil (SS) and a silty clay soil (NS) from 1220 mg/kg and 2730 mg·kg⁻¹ to 414 mg·kg⁻¹ and 180 mg·kg⁻¹, respectively. Compared with extraction alone and oxidation alone, TX-100 + SP(l) increased the removal of PAHs by 10–20%. TX-100 improved the degradation of 3–4 ring PAHs (M-PAHs) and 5–6 ring PAHs (H-PAHs) in SS, by approximately 8%–11%. The oxygenated polycyclic aromatic hydrocarbons (oxy-PAHs) including furans and xanthene exhibited greater reductions in soil when amended with the TX-100 and SP, than under TX-100 extraction or SP oxidation alone. Overall, increased removal of PAHs in contaminated soil can occur through simultaneous application of TX-100 and SP, relative to the sole use of TX-100 or SP. The sequential combination of surfactant and oxidant was most effective for the elimination of PAHs, especially for M-PAHs and H-PAHs in sandy loam contaminated soil.

提出了一种修复多环芳烃（PAHs）污染土壤的方法，该方法包括表面活性剂辅助土壤洗涤和活性过硫酸盐（SP）的化学氧化的组合。在这项研究中，Triton X-100（TX-100）和SP同时或顺序施用于土壤。结果表明，表面活性剂随后用SP，TX-100 + SP（l）溶液进行改性，最有效地将沙质壤土（SS）和粉质粘土（NS）中的PAHs浓度从1220 mg / kg降低和2730 mg·kg ^-1至414 mg·kg^-1和180 mg·kg^-1， 分别。与单独提取和单独氧化相比，TX-100 + SP（l）使PAHs的去除增加了10％至20％。TX-100改善了SS中3–4环PAH（M-PAH）和5–6环PAH（H-PAH）的降解，降低了大约8％–11％。与单独使用TX-100萃取或SP氧化相比，用TX-100和SP改性时，包括呋喃和x吨的含氧多环芳烃（oxy-PAHs）在土壤中的减少程度更大。总体而言，与单独使用TX-100或SP相比，通过同时施用TX-100和SP可以增加被污染土壤中PAHs的去除。表面活性剂和氧化剂的顺序结合对于消除多环芳烃最为有效，尤其是对于砂壤土污染土壤中的多环芳烃和多环芳烃而言。