净水技术2025，Vol.44Issue(4)：81-87,7.DOI:10.15890/j.cnki.jsjs.2025.04.010
UV/Cu(Ⅱ)/亚硫酸盐自氧化工艺去除水中典型新污染物布洛芬
Degradation of Typical Emerging Contaminant Ibuprofen in Water by UV/Cu(Ⅱ)/Sulfite Auto-Oxidation Process
摘要
Abstract
[Objective]Under the background of the acceleration of global urbanization and the intensification of industrial activities,the law of residual,migration and transformation of emerging pollutants in water environment has become the focus of research in the field of water treatment.Due to its incomplete removal in wastewater treatment plants and environmental persistence,it has been widely detected in surface water worldwide,and there is an urgent need to develop new water treatment processes with both efficient degradation capacity and environmental compatibility.[Methods]In this paper,the degradation of ibuprofen(IBP)by UV/Cu(Ⅱ)/sulfite auto-oxidation process was investigated.The effects of pH,sulfite and Cu(Ⅱ)dosage on the degradation of IBP were evaluated.[Results]The mechanisms of different free radicals were explored,and the possible degradation pathways of IBP were proposed.The result demonstrated that the degradation of IBP by UV/Cu(Ⅱ)/sulfite auto-oxidation process was in accordance with the pseudo-first order kinetic model.Cu(Ⅱ)effectively facilitated IBP degradation in UV/sulfite process,and the degradation rate constant of IBP increased from 0.047 64 min-1 to 0.130 51 min-1,while the sulfite decomposition rate increased.The degradation rate of IBP was positively correlated with the concentration of sulfite,and weak alkaline pH value(8.0)and low concentration(5 μmol/L)of Cu(Ⅱ)were found to be conducive to the degradation.Sulfate radical(SO4·-)served as the primary active radical responsible for IBP degradation,with the contribution rate of 51.64％,and hydroxyl radical(·OH)only contributed 15.45％.[Condusion]Synergistic sulfite activation by UV irradiation and CuOH+complexes produced more SO4·-and·OH,accelerating IBP degradation.In the UV/Cu(Ⅱ)/sulfite auto-oxidation process,a total of 13 degradation products of IBP were detected,which suggested 4 possible transformation pathways,including hydroxylation,decarboxylation,carbonylation and demethylation.关键词
紫外(UV)/亚硫酸盐/二价铜离子/自氧化工艺/布洛芬Key words
ultraviolet(UV)/sulfite/divalent copper ion/auto-oxidation process/ibuprofen(IBP)分类
环境科学引用本文复制引用
林常春,徐栋,王昕,邓靖..UV/Cu(Ⅱ)/亚硫酸盐自氧化工艺去除水中典型新污染物布洛芬[J].净水技术,2025,44(4):81-87,7.基金项目
国家自然科学基金(51978618) （51978618）
浙江省自然科学基金(LZ24E080005,LY21E080018) （LZ24E080005,LY21E080018）
浙江省自然科学基金联合基金(LZJWZ23E080001) （LZJWZ23E080001）
