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,杨银海,汪欢,雷乐成,杨彬
摘要(Abstract):
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。
关键词(KeyWords): 双氯芬酸;介质阻挡放电;传质-反应模型;反应动力学
基金项目(Foundation): 浙江省领雁研发计划(2023C03140);; 国家自然科学基金(22278366)
作者(Author): 姜涛,杨银海,汪欢,雷乐成,杨彬
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