Alcohols are commonly used as eluents for the regeneration of per/poly-fluoroalkyl substances (PFASs) adsorbents, but their potential effects on the subsequent treatment of these eluates have not been fully explored. This work investigated the effect of alcohols on perfluorooctanoic acid (PFOA) degradation by persulfate (PS) based advanced oxidation processes. The results showed that ethanol significantly promoted PFOA degradation in thermal/PS system. Under anoxic conditions, 25.5$\pm$1.4% or 91.2$\pm$1.6% of PFOA was degraded within 48 h in the absence or presence of ethanol. Electron paramagnetic resonance (EPR) detection, free radical quenching experiments, and chemical probe studies clearly demonstrated that the sulfate radicals (SO₄^•−) generated from PS activation would react with ethanol to form alcohol radicals, which could efficiently degrade PFOA. The transformation pathways of PFOA were proposed based on degradation products analysis and density function theory (DFT) calculation. The reaction between SO₄^•− and other alcohols could also induce the formation of alcohol radicals and facilitate to the degradation of PFOA. This work represents the positive roles of alcohols in the degradation of PFASs, providing new insights into developing simple and efficient treatments for PFASs eluate or PFAS-contaminated water.

醇通常用作全氟烷基物质（PFAS）吸附剂再生的洗脱液，但其对这些洗脱液后续处理的潜在影响尚未得到充分探讨。这项工作研究了醇对基于过硫酸盐 (PS) 的高级氧化工艺降解全氟辛酸 (PFOA) 的影响。结果表明，乙醇显着促进热/PS体系中PFOA的降解。缺氧条件下，25.5$\pm$1.4% 或 91.2$\pm$无论是否存在乙醇，1.6% 的 PFOA 在 48 小时内被降解。电子顺磁共振（EPR）检测、自由基猝灭实验和化学探针研究清楚地表明，PS活化产生的硫酸根（SO ₄ ^•− ）会与乙醇反应形成醇自由基，从而有效降解PFOA。基于降解产物分析和密度函数理论（DFT）计算，提出了PFOA的转化途径。_{SO 4} ^{•−与其他醇类的}反应也能诱导醇自由基的形成，促进PFOA 的降解。这项工作代表了醇在 PFAS 降解中的积极作用，为开发简单有效的 PFAS 洗脱液或 PFAS 污染水处理方法提供了新的见解。