臭氧/过硫酸氢钾体系降解酮洛芬的动力学研究  

Study on Ketoprofen Degradation Kinetics under Ozone/Potassium Peroxy Monosulfate

作　　者：林晓璇 王如意[1] LIN Xiao-xuan;WANG Ru-yi(Guangdong Food and Drug Vocationa College,Guangdong Guangzhou 510520,China)

机构地区：[1]广东食品药品职业学院,广东广州510520

出　　处：《广州化工》2022年第6期55-57,71,共4页GuangZhou Chemical Industry

基　　金：广东食品药品职业学院2019年校级自然科学青年项目(项目编号:2019ZR24)。

摘　　要：利用臭氧/过硫酸氢钾体系降解酮洛芬模拟废水,考察了不同反应温度、初始浓度、初始pH值下酮洛芬的降解动力学,并拟合表观动力学方程;采用竞争法,以硝基苯和苯甲酸为分子探针,测定酮洛芬与硫酸根自由基的二级反应速率常数。结果表明,不同实验条件下酮洛芬降解符合准一级动力学,通过对实验数据进行拟合得到表观动力学方程k=494296exp(-31494/RT)C_(0)^(-0.36770)[OH^(-)]^(0.1478),酮洛芬与硫酸根自由基的二级反应速率常数为1.49×10^(9)M^(-1)s^(-1)。The simulated Ketoprofen(KET)wastewater was oxidized by Ozone/Potassium Peroxy Monosulfate(O_(3)/PMS)system.Degradation kinetics experiments were conducted under different reaction temperature,initial KET concentration and initial pH values,and the apparent kinetics equation was fitted.Nitrobenzene(NB)and benzoic acid(BA)were adopted in the competition experiments as probe to measure the second-order rate constant between KET and sulfate radical(SO_(4)^(-)·).Results indicated that KET degradation followed the pseudo-order kinetics,and the apparent kinetics equation was obtained by fitting experimental data(k=494296exp(-31494/RT)C_(0)^(-0.36770)[OH^(-)]^(0.1478)).The second-order rate constant of KET with SO_(4)^(-)·was 1.49×10^(9)M^(-1)s^(-1).

关 键 词：臭氧 硫酸根自由基 酮洛芬 表观动力学方程 二级速率常数 

分 类 号：TQ[化学工程]