UV/OA/Fe(Ⅱ)/PS降解对乙酰氨基酚的有效性研究  

Study on the effectiveness of UV/OA/Fe(Ⅱ)/PS in degrading acetaminophen

作　　者：李建民[1] 张楠[1] LI Jianmin;ZHANG Nan(School of Resource and Environment,Henan Institute of Science and Technology,Xinxiang 453003,China)

机构地区：[1]河南科技学院资源与环境学院,河南新乡453003

出　　处：《工业水处理》2023年第12期133-139,共7页Industrial Water Treatment

基　　金：驼人集团产学研合作项目(2022410717000005)。

摘　　要：研究了UV/草酸(OA)/Fe(Ⅱ)/过硫酸盐(PS)降解对乙酰氨基酚(AAP)的有效性。考察了PS初始浓度、AAP初始浓度、C(OA)/C[Fe(Ⅱ)]、pH和无机阴离子(HCO_(3)^(-)、NO_(3)^(-)、Cl^(-)和NO_(2)^(-))对AAP降解效果的影响,并研究不同pH下产生自由基的贡献率。结果表明,OA对UV/Fe(Ⅱ)/PS降解AAP起促进作用,C(OA)/C[Fe(Ⅱ)]为4∶1、pH为3时,UV/OA/Fe(Ⅱ)/PS降解AAP效果最好。HCO_(3)^(-)对UV/OA/Fe(Ⅱ)/PS降解AAP起抑制作用,NO_(3)^(-)、Cl^(-)和NO_(2)^(-)对UV/OA/Fe(Ⅱ)/PS降解AAP起促进作用。UV/OA/Fe(Ⅱ)/PS体系中·OH是起主要作用的活性氧物种。UV/OA/Fe(Ⅱ)/PS降解AAP的主要产物有N-(3,4-二羟基苯基)乙酰胺、4-甲基邻苯二酚、对氨基苯酚、对苯二酚和1,2,4-苯三酚。The effectiveness of UV/oxalate(OA)/Fe(Ⅱ)/persulfate(PS)on the degradation of acetaminophen(AAP)was investigated.The effects of PS concentration,AAP concentration,concentration ratio of OA and Fe(Ⅱ),pH and inorganic anions(HCO_(3)^(-),NO_(3)^(-),Cl^(-)and NO_(2)^(-))on the photodegradation of AAP were evaluated and the contribution rate of free radical generation at different pH in the system was studied.The results showed that the photodegradation of AAP with UV/Fe(Ⅱ)/PS was promoted by OA,and when the concentration ratio of OA and Fe(Ⅱ)was 4∶1 and the pH was 3,UV/OA/Fe(Ⅱ)/PS had the best effect on the degradation of acetaminophen.HCO_(3)^(-)had inhibitive effect on the degradation of AAP in the UV/OA/Fe(Ⅱ)/PS system,while NO_(3)^(-),Cl^(-)and NO_(2)^(-)promoted the degradation of AAP in the UV/OA/Fe(Ⅱ)/PS system.The active specie of·OH played a major oxidation role in UV/OA/Fe(Ⅱ)/PS system.The main products of UV/OA/Fe(Ⅱ)/PS degradation of AAP were N-(3,4-dihydroxyphenyl)acetamide,4-methyl catechol,4-aminophenol,hydroquinone and 1,2,4-benzenetriol.

关 键 词：过硫酸盐 草酸 Fe(Ⅱ) 自由基 

分 类 号：TQ426[化学工程] X703[环境科学与工程—环境工程]