环境工程学报2025，Vol.19Issue(8)：1783-1793,11.DOI:10.12030/j.cjee.202408105
Fe(Ⅱ)活化过硫酸钠降解含吐温-80水体中的复合氯代烃
Degradation of mixed chlorinated hydrocarbons in Tween-80-containing water by Fe(Ⅱ)-activated sodium persulfate
摘要
Abstract
Degradation of trichloroethylene(TCE),tetrachloroethylene(PCE),and carbon tetrachloride(CT)co-contamination in groundwater was investigated using a Fe(Ⅱ)-activated persulfate(PS)system in the presence of the surfactant Tween-80(TW-80).Citric acid(CA)or nano zero-valent iron(nZVI)was introduced as an enhancer to evaluate its synergistic effect on the PS/Fe(Ⅱ)system for co-contaminant degradation.Batch experiments were conducted to examine the enhanced degradation performance of CA and nZVI in the PS/Fe(Ⅱ)system,with emphasis on the effects of reagent dosage and TW-80 concentration on chlorinated hydrocarbon removal.The dominant reactive species responsible for pollutant degradation in the enhanced systems were identified,and the feasibility of applying this approach to actual groundwater was verified.Results demonstrated that appropriate CA or nZVI doses(＜0.6 mmol·L-1)significantly improved the degradation efficiency of chlorinated hydrocarbons.TW-80 exhibited dual effects:it inhibited TCE and PCE removal while promoting CT degradation,with optimal average removal rates for TCE,PCE,and CT achieved at 0.5 g·L-1 TW-80.Hydroxyl radicals(HO-)and sulfate radicals(SO4·-)dominated TCE and PCE degradation,whereas reductive radicals derived from TW-80 decomposition primarily drove CT degradation.Although degradation efficiency declined in real groundwater due to complex water matrices,increasing reagent dosage effectively mitigated these adverse effects,enabling efficient co-contaminant removal.关键词
过硫酸盐高级氧化/Fe(Ⅱ)活化/强化降解/复合氯代烃污染/表面活性剂Key words
persulfate-based advanced oxidation/Fe(Ⅱ)activation/enhanced degradation/mixed chlorinated hydrocarbon contamination/surfactant分类
资源环境引用本文复制引用
徐志强,张后虎,穆洪新,汤进,顾璐瑶,周蓉,虞悦,卜元卿..Fe(Ⅱ)活化过硫酸钠降解含吐温-80水体中的复合氯代烃[J].环境工程学报,2025,19(8):1783-1793,11.基金项目
国家重点研发计划课题资助项目(2023YFC3706603) （2023YFC3706603）
国家重点研发计划子课题资助项目(2022YFC2105405) （2022YFC2105405）
