化工进展2023，Vol.42Issue(11)：6102-6112,11.DOI:10.16085/j.issn.1000-6613.2023-0009
UV/H2O2和UV/NaClO工艺降解吉非罗齐的比较
Comparative investigation of gemfibrozil degradation by UV/H2O2 and UV/NaClO processes
摘要
Abstract
The degradation of gemfibrozil(GEM)by UV/H2O2 and UV/NaClO processes was comparatively evaluated.Both advanced oxidation systems can effectively degrade GEM.Compared with UV/H2O2 system,the degradation rate of GEM in UV/NaClO system was faster.In UV/H2O2 and UV/NaClO systems,the degradation rate of the target increased with the increase of oxidant concentrations.Because pH could affect the oxidation capacity of ‧OH and the composition ratio of free radicals in UV/NaClO system,the pH of the solutions had a significant impact on both systems.When pH was increased from 5 to 11,the kobs in UV/H2O2 and UV/NaClO decreased from 0.2115min-1 and 1.3115min-1 to 0.1064min-1 and 0.2283min-1,respectively.Cl-and HCO-3 can slightly accelerate the degradation of GEM in UV/NaClO system,but slightly slow down the degradation of GEM in UV/H2O2 system.HA can inhibit GEM degradation in both systems through competition and filter effect.Because the molar absorption coefficient of HClO/ClO-was higher than H2O2,HA had less inhibitory effect on GEM degradation in UV/NaClO system compared with UV/H2O2 system.The main oxidation species degrading GEM in UV/NaClO system were ‧OH and Cl‧.The degradation path of GEM in both systems mainly included hydroxylation,demethylation,H-extraction and C—O bond breakage steps.In terms of economic benefits,UV/NaClO system was more cost-effective than UV/H2O2 system.关键词
自由基/紫外/过氧化氢/紫外/次氯酸钠/高级氧化/降解路径/反应动力学Key words
radical/UV/H2O2/UV/NaClO/advanced oxidation/degradation path/reaction kinetics分类
资源环境引用本文复制引用
闫博引,韩春宇,夏晶晶,王松雪,武桂芝,夏文香,李金成..UV/H2O2和UV/NaClO工艺降解吉非罗齐的比较[J].化工进展,2023,42(11):6102-6112,11.基金项目
山东省自然科学基金(ZR2021QE234) （ZR2021QE234）
国家自然科学基金(52100010) （52100010）
河海大学浅水湖泊综合治理与资源开发教育部重点实验室开放项目. （）
