介质阻挡放电等离子体降解废水中双氯芬酸的动力学研究  

Kinetic study of diclofenac degradation in aqueous solution by dielectric barrier discharge plasma

作　　者：姜涛[1] 杨银海 汪欢 雷乐成[1,2] 杨彬 JIANG Tao;YANG Yinhai;WANG Huan;LEI Lecheng;YANG Bin(College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310058,China;Institute of Zhejiang University-Quzhou,Quzhou 324000,China)

机构地区：[1]浙江大学化学工程与生物工程学院,浙江杭州310058 [2]浙江大学衢州研究院,浙江衢州324000

出　　处：《高校化学工程学报》2024年第6期971-978,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：浙江省领雁研发计划(2023C03140);国家自然科学基金(22278366)。

摘　　要：针对近年来以药物和个人护理产品(PPCPs)为代表的新污染物在水中频繁检出的问题,选取双氯芬酸(DCF)作为目标污染物,基于平板式循环介质阻挡放电(DBD)反应器进行DCF降解宏观动力学研究,并建立了DCF和活性物质的传质-反应模型,探究了DBD降解DCF的本征动力学。结果表明,在平板式循环DBD反应器中,DCF的降解符合一级动力学,降解速率常数为0.175 min^(-1),且宏观动力学反应常数受到输入电压、电极间距、初始质量浓度等因素的影响,其常数K=8.533 mol·min^(-1)·mm^(3.25)·W^(-0.75)。DCF单次流过放电区域的转化率受到输入功率、电极间距和溶液流速的影响,且DCF在DBD系统中的本征动力学反应为二级反应。Pharmaceuticals and personal care products(PPCPs)are frequently detected in water in recent years.In this paper,diclofenac(DCF)was selected as the target contaminant and the macro-kinetics of DCF degradation was investigated based on a plate type circulating dielectric barrier discharge(DBD)reactor.The macroscopic kinetics of DCF degradation was investigated based on the degradation experiments in a flat-plate circulating DBD reactor.The results show that the degradation of DCF in a flat plate circulating DBD reactor is consistent with primary kinetics,and the degradation rate constant is 0.175 min^(-1).The macro kinetic reaction constants are affected by input voltage,electrode spacing and initial concentration,and K=8.533 mol×min^(-1)×mm3.25×W^(-0.75).The conversion rate of DCF in a single flow through the discharge region is affected by input power,electrode spacing and solution flow rate,and the intrinsic kinetic reaction of DCF in a DBD system is a secondary reaction.

关 键 词：双氯芬酸 介质阻挡放电 传质-反应模型 反应动力学 

分 类 号：X703[环境科学与工程—环境工程]