文献类型：期刊文献

英文题名：Thermal assisted heterogeneous activation of peroxymonosulfate by activated carbon to degrade perfluorooctanoic acid in soil

作者：Liu, Guanhong[1,2];Qian, Jiahao[1];Zhang, Yu[1];Lin, Kuangfei[1];Liu, Fuwen[3]

机构：[1]East China Univ Sci & Technol, Sch Resource & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Univ Rennes, ISCR UMR6226, CNRS, Ecole Natl Super Chim Rennes, F-35000 Rennes, France;[3]Shanghai Inst Technol, Sch Chem & Environm Engn, Shanghai 201418, Peoples R China

年份：2022

卷号：10

期号：3

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20222012128930);WOS:【SCI-EXPANDED(收录号:WOS:000793814700004)】；

基金：This research was supported by National Key Research and Development Program of China (No. 2019YFC1803701), National Natural Science Foundation of China (No. 51708223) and we acknowledge the Chinese Scholarship Council of PR China for providing financial support for Guanhong Liu to stay at the ENSCR.

语种：英文

外文关键词：Thermal activation; Activated carbon; PFOA; Soil organic carbon; DFT calculation

摘要：The chemical degradation of perfluorooctanoic acid (PFOA), an -environmentally persistent contaminant, has recently attracted much attention. Still, very few reports have focused on the degradation of PFOA in soil due to the process's non-liquid, complex system and uneasy operation. In this study, thermal treatment was applied in the remediation of PFOA contaminated soil. Complementary to thermal activation of peroxymonosulfate (PMS), fresh activated carbon (FAC) and modified activated carbon (NAC), which were used as heterogeneous catalysts, were incorporated into the system to promote the production of sulfate radicals (SO4 center dot-) and the diminution of PFOA in soil. Two portions of soils, both homogenous but one with and the other without natural organic carbon (OC), were provided to study the impact of OC on the elimination of PFOA in soil. The degradation of PFOA was initiated using the combined methods in cohesion with heat activation. During the process, the effect of temperature, the dosing amount of catalyst and oxidant, the reaction time and the volume ratio between soil and solution on the degradation of PFOA in soil were fully studied and optimized. The results showed that over a 12 h period, a PFOA (1.0 mg/kg) removal of 76% and 70% by using FAC/PMS and NAC/PMS respectively could be achieved at 60 C. Furthermore, density functional theory (DFT) calculations were combined with experimental data and verify that the adsorption ability of both FAC and NAC for PFOA are 3 times stronger than that of soil grain. This greater adsorption can attract PFOA molecules from within soil and provide opportunities for interactions with oxidative radicals. This work sheds light on a much over-looked aspect of advanced oxidation of PFOA in soil systems, which might provide a potential option for the in-situ remediation of PFOA contaminated soil in the future.