高压脉冲放电降解直接耐晒翠蓝GL废水  

Degradation of direct blue GL wastewater DB86 by high voltage pulsed discharge plasma

作　　者：张芹 董冰岩[1] 李贞栋 王佩祥 李琼[1] ZHANG Qin;DONG Bingyan;LI Zhendong;WANG Peixiang;LI Qiong(School of Emergency Management and Safety Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi Province,China)

机构地区：[1]江西理工大学应急管理与安全工程学院,江西赣州341000

出　　处：《化学工程》2023年第11期1-6,19,共7页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(51567010);江西理工大学校级创新专项资金项目(XY2022-S114)。

摘　　要：采用自制高压脉冲放电等离子体反应器降解染料废水中的DB86(直接耐晒翠蓝GL),研究脉冲电压、电极间距、气体流量、初始质量浓度等参数对DB86降解效果的影响,并分析放电过程中质量浓度ρ_(TOC)、pH值的变化规律。结果表明:DB86质量浓度为100 mg/L时,在脉冲电压22 kV、脉冲频率50 Hz、放电间距8 mm、空气流量3.0 L/min、电导率200μS/cm条件下降解效果达到最好。动力学研究表明,高压脉冲放电降解DB86染料废水的过程符合伪一级反应动力学模型。通过对DB86分子降解机理分析,得出放电过程产生的活性物质导致染料废水降解,其中·OH起关键作用。并生成第3方酸性物质甲酸、乙酸等。整个放电过程中溶液的pH值呈下降趋势,溶液最终显酸性。DB86(Direct Blue GL)in dye wastewater was degraded by a self-made high-voltage pulsed discharge plasma reactor.The effects of pulse voltage,electrode spacing,gas flow rate,initial mass concentration and other parameters on the degradation of DB86 were studied,and the variation of total organic carbon mass concentration ρ_(TOC) and pH during discharge was analyzed.The results show that when the mass concentration of DB86 is 100 mg/L,the degradation effect is the best under the conditions of pulse voltage 22 kV,pulse frequency 50 Hz,discharge spacing 8 mm,air flow 3.0 L/min and conductivity 200μS/cm.The kinetic study show that the process of degradation of DB86 dye wastewater by high-voltage pulse discharge is in line with the pseudo-first-order reaction kinetic model.Through the analysis of the molecular degradation mechanism of DB86,it is concluded that the reactive substances produced in the discharge process lead to the degradation of dye wastewater,in which·OH plays a key role.Third party acidic substances such as formic acid and acetic acid are generated,resulting in a downward trend of the pH of the solution and finally becoming acidic.

关 键 词：脉冲放电 染料 DB86废水 降解 矿化率 

分 类 号：X703[环境科学与工程—环境工程]