Characteristics of gas-liquid diaphragm discharge and its application on decolorization of brilliant red B in aqueous solution  

作　　者：Qingsong GAO Yongjun LIU Bing SUN 高青松;刘永军;孙冰(College of Environmental Science&Engineering,Dalian Maritime University,Dalian 116026,People's Republic of China)

机构地区：College of Environmental Science ＆ Engineering, Dalian Maritime University, Dalian 116026, People＇s Republic of China

出　　处：《Plasma Science and Technology》2017年第11期31-37,共7页等离子体科学和技术（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities(3132016056);the Natural Science Foundation of Fujian province,China(No.2015J01651);National Natural Science Foundation of China(No.11005014)

摘　　要：A simple gas-liquid diaphragm discharge reactor was designed and characteristics of the discharge and its application on decolorization of brilliant red B in an aqueous solution were investigated. The results showed that strong oxidizing agents such as ·OH and ·O radicals were generated. Average electron temperature of the discharge was 0.72 eV, 1.15 eV and 0.83 eV with air, oxygen and argon as the discharge gas, respectively. Solution p H and conductivity changed little when oxygen or argon was used as the discharge gas; however, these two parameters changed significantly when the discharge was performed in air. During the discharge treatment,the characteristic absorption peaks of brilliant red B gradually decreased where the decolorization followed the first-order kinetics. With 10 min of discharge, the decolorization of brilliant red B（30 mg L^-1） can reach 96%, 81% and 62% in the cases of oxygen, argon and air,respectively. The analysis of by-products showed that the brilliant red B molecule can be effectively destroyed in this discharge mode.A simple gas-liquid diaphragm discharge reactor was designed and characteristics of the discharge and its application on decolorization of brilliant red B in an aqueous solution were investigated. The results showed that strong oxidizing agents such as ·OH and ·O radicals were generated. Average electron temperature of the discharge was 0.72 eV, 1.15 eV and 0.83 eV with air, oxygen and argon as the discharge gas, respectively. Solution p H and conductivity changed little when oxygen or argon was used as the discharge gas; however, these two parameters changed significantly when the discharge was performed in air. During the discharge treatment,the characteristic absorption peaks of brilliant red B gradually decreased where the decolorization followed the first-order kinetics. With 10 min of discharge, the decolorization of brilliant red B（30 mg L^-1） can reach 96%, 81% and 62% in the cases of oxygen, argon and air,respectively. The analysis of by-products showed that the brilliant red B molecule can be effectively destroyed in this discharge mode.

关 键 词：gas-liquid diaphragm discharge brilliant red B decolorizafion 

分 类 号：X791[环境科学与工程—环境工程]