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
姜涛 1杨银海 2汪欢 1雷乐成 2杨彬2
作者信息
- 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 化学工程与生物工程学院,浙江 杭州 310058;浙江大学衢州研究院,浙江 衢州 324000
- 折叠
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·mm3.25·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.
Abstract
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Key words
diclofenac/dielectric barrier discharge/mass transfer-reaction model/reaction kinetics引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据