In this work, the use of a coupled process, alkyl glycoside (APG) enhanced soil desorption followed by the zero-valent iron-ethylenediaminetetraacetic acid (EDTA)-air (ZEA) Fenton-like system, was investigated for the remediation of a simulated hexachlorobenzene (HCB)-contaminated diatomite soil and a real HCB-contaminated soil. Three surfactants with different concentrations were studied to obtain the suitable soil desorption agent. Compared with APG0810 and Triton x-100, APG0814 showed a better solubilization effect due to its lower critical micelle concentration. With addition of 3000 mg L-1 APG0814, 35% of HCB was removed from contaminated diatomite soil, and a small amount of residual APG in diatomite soil was found to be beneficial for the soil dispersion. After treatment with the ZEA system, the removal efficiency of HCB in the diatomite soil desorption solution reached 76% in 2 h; we observed that a small amount of APG retained in the desorption solution accelerated the HCB removal. A real HCB-contaminated soil was used to verify the remediation effects. This study demonstrates that our approach is a feasible alternative for remediating soil contaminated with hydrophobic organic compounds.

中文翻译：

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烷基糖苷增强解吸和零价铁-EDTA-空气处理修复六氯苯污染土壤

在这项工作中，研究了使用耦合过程，烷基糖苷 (APG) 增强土壤解吸，然后是零价铁-乙二胺四乙酸 (EDTA)-空气 (ZEA) 类芬顿系统，用于修复模拟六氯苯 (HCB) 污染的硅藻土和真正的六氯苯污染土壤。研究了三种不同浓度的表面活性剂，以获得合适的土壤解吸剂。与 APG0810 和 Triton x-100 相比，APG0814 由于其较低的临界胶束浓度而显示出更好的增溶效果。添加3000 mg L-1 APG0814后，从污染的硅藻土中去除了35%的六氯苯，硅藻土中少量残留的APG有利于土壤的分散。用ZEA系统处理后，2 h对硅藻土解吸液中六氯苯的去除率达到76%；我们观察到解吸溶液中保留的少量 APG 加速了 HCB 的去除。使用真实的六氯苯污染土壤来验证修复效果。这项研究表明，我们的方法是修复被疏水性有机化合物污染的土壤的可行替代方法。