Mechanistic study on 4,4'-sulfonylbis removal with CO_(2)/Ar gas-liquid DBD plasma  

作　　者：Guangjia WANG Shidong FANG Baoguo LIN Chengzhu ZHU Jie SHEN 王广佳;方世东;林保国;朱承驻;沈洁(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,People’s Republic of China;Institute of Plasma Physics,HFIPS,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China;Anhui Kexin Environmental Protection Co.Ltd.,Hefei 230031,People’s Republic of China)

机构地区：[1]School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,People’s Republic of China [2]Institute of Plasma Physics,HFIPS,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China [3]Anhui Kexin Environmental Protection Co.Ltd.,Hefei 230031,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第10期82-92,共11页等离子体科学和技术（英文版）

基　　金：supported jointly by National Natural Science Foundation of China(No.51877208);Anhui Provincial Key R&D Programmers(No.202004a07020047)。

摘　　要：In this study,a single dielectric barrier discharge(DBD)coaxial reactor was used to degrade 4,4'-sulfonylbis(TBBPS)in water using greenhouse gas(CO_(2))and argon as the carrier gases.The investigation focused on CO_(2)conversion,reactive species formation,gas-liquid mass transfer mechanism,and degradation mechanism of TBBPS during the discharge plasma process.With the decrease of CO_(2)/Ar ratio in the process of plasma discharge,the emission spectrum intensity of Ar,CO_(2)and excited reactive species was enhanced.This increase promoted collision and dissociation of CO_(2),resulting in a series of chemical reactions that improved the production of reactive species such as·OH,^(1)O_(2),H_(2)O_(2)and O_(3).These reactive species initiated a sequence of reactions with TBBPS.Results indicated that at a gas flow rate of 240 mL/min with a CO_(2)/Ar ratio of 1:5,both the highest CO_(2)conversion rate(17.76%)and TBBPS degradation rate(94.24%)were achieved.The degradation mechanism was elucidated by determining types and contents of reactive species present in treatment liquid along with analysis of intermediate products using liquid chromatography-mass spectrometry techniques.This research provides novel insights into carbon dioxide utilization and water pollution control through dielectric barrier discharge plasma technology.

关 键 词：dielectric barrier discharge carbon dioxide conversion 4 4'-sulfonylbis wastewater treatment 

分 类 号：X703[环境科学与工程—环境工程]