四川环境2025，Vol.44Issue(3)：66-73,8.DOI:10.14034/j.cnki.schj.2025.03.009
有机污染土壤筛分预处理强化氧化工艺研究
Study on Enhanced Oxidation Process with Screening Pretreatment for Organic Contaminated Soil:A Case Study of Soil Co-contaminated with Petroleum Hydrocarbons and Polycyclic Aromatic
摘要
Abstract
To address the issues of high costs and low efficiency in chemical oxidation remediation of organic polluted soils,indoor batch tests were conducted.The study involved using ferrous activation of sodium persulfate and Fenton reagent to oxidize soil contaminated with petroleum hydrocarbons and polycyclic aromatic hydrocarbons(PAHs).The effects of two processes-direct oxidation and enhanced oxidation with screening pretreatment-on pollutants and soil physicochemical properties were investigated.When employing the direct oxidation process,Fenton treatment generally achieved a higher removal efficiency of total PAHs in soil samples with varying particle sizes compared to ferrous-activated sodium persulfate.The most significant effect was observed in soil samples larger than 200 mesh,with an increase of up to 141％.Conversely,ferrous-activated sodium persulfate showed superior removal rates for total petroleum hydrocarbons(C10-C40)across different particle sizes,especially in 100-200 mesh samples,with a relative increase of 456％.When using screening pretreatment to strengthen the oxidation process,Fenton oxidation notably improved the removal of total petroleum hydrocarbons(C10-C40)in soil samples with particle sizes of 10-60 mesh,100-200 mesh,and over 200 mesh,with the most pronounced effect in the 100-200 mesh samples,where the removal rate increased by approximately 330％.Thus,for soils contaminated with petroleum hydrocarbons,screening pretreatment combined with Fenton oxidation is recommended,while for soils contaminated with PAHs,direct Fenton oxidation is more suitable.关键词
土壤/有机化合物/污染/氧化/粒径Key words
Soil/organic compounds/pollution/oxidation/particle size分类
环境科学引用本文复制引用
肖愉,朱迪伍,元妙新,魏宇琦,陈欢..有机污染土壤筛分预处理强化氧化工艺研究[J].四川环境,2025,44(3):66-73,8.基金项目
国家重点研发计划(2023YFC3707700). （2023YFC3707700）
