等离子体活化过硫酸盐降解对乙酰氨基酚机理研究

Study on the mechanism of degradation of acetaminophen by persulfate activated by plasma

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中文摘要：过硫酸盐(persulfate,PS)可被活化产生具有强氧化性的硫酸根自由基(SO4-·),利用介质阻挡放电(dielectric barrier discharge,DBD)等离子体活化PS降解水中对乙酰氨基酚(acetaminophen,AP),研究AP初始质量浓度、工作气体流量和PS投加量对降解效果的影响,利用高效液相色谱-质谱联用仪对可能的降解产物和降解路径进行分析和推测.实验结果表明,等离子体/PS能有效去除水中AP,AP的去除率随着初始质量浓度的增加而降低,气体流量对降解效果影响较大,适当增加流量可促进AP的降解,当流量超过50 L/h后,促进效果逐渐减弱,PS的加入能加速AP的降解,当PS投加量为0.75 g/L时,处理效果最佳.实验处理废水过程中,AP会被分解为小分子物质、CO2和H2O,在添加PS后,矿化率是单独等离子体处理的2.1倍.

外文摘要：Persulfate(PS)can be activated to produce strong oxidizing sulfate radical(SO4-·),the di-electric barrier discharge(DBD)plasma activated PS was used to degrade acetaminophen(AP)in wa-ter.The effects of initial concentration of AP,working gas flow rate and dosage of PS on the degrada-tion effect were studied,and the possible degradation products and degradation paths were analyzed and speculated by mass spectrometry.The experimental results show that plasma/PS can effectively remove AP from water,and the removal rate of AP decreases with the increase of its initial concentra-tion.The gas flow rate has a great influence on the degradation effect,and increasing the flow rate appropriately can promote the degradation of AP.When the flow rate exceeds 50 L/h,the promoting effect is gradually weakened,and the addition of PS can accelerate the degradation of AP.When the dosage of PS is 0.75 g/L,the treatment effect is the best.In the process of experimental treatment of wastewater,AP will be decomposed into small molecules,CO2 and H2O,and the mineralization rate after adding PS is 2.1 times that of plasma treatment alone.

外文关键词：

dielectric barrier discharge(DBD)acetaminophen(AP)persulfate(PS)degradationnon-thermal plasma

作者：

叶朝兵、许子牧、胡淑恒、兰彦、程诚

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作者单位：

合肥工业大学资源与环境工程学院,安徽合肥 230009

中国科学院等离子体物理研究所,安徽合肥 230031

关键词：

介质阻挡放电(DBD) 对乙酰氨基酚(AP) 过硫酸盐(PS) 降解低温等离子体

基金：

国家自然科学基金国家自然科学基金国家自然科学基金安徽省医学物理与技术重点实验室项目合肥工业大学博士点专项研究基金

项目编号：

517772065180704651877208LMPT2017Y7BP0U1581JZ2017HGBZ0944

出版年：

2024

DOI：

10.3969/j.issn.1003-5060.2024.03.017

合肥工业大学学报(自然科学版)

合肥工业大学

合肥工业大学学报(自然科学版)

CSTPCD北大核心

影响因子：0.608

ISSN：1003-5060

年,卷(期)：2024.47(3)

参考文献量25