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

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 ele...

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Published inPlasma science & technology Vol. 19; no. 11; pp. 31 - 37
Main Author 高青松;刘永军;孙冰
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.11.2017
Subjects
brilliant red B
decolorization
gas-liquid diaphragm discharge
应用
放电气体
放电特性
气液
水溶液
脱色率
艳红
隔膜
Online AccessGet full text
ISSN1009-0630
1009-0630
DOI10.1088/2058-6272/aa8593

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Abstract 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.
AbstractList 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 pH 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.
Author 高青松;刘永军;孙冰
AuthorAffiliation College of Environmental Science ＆ Engineering, Dalian Maritime University, Dalian 116026, People＇s Republic of China
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Notes Qingsong GAO,Yongjun LIU,Bing SUN（College of Environmental Science ＆ Engineering, Dalian Maritime University, Dalian 116026, People＇s Republic of China）
gas-liquid diaphragm discharge, brilliant red B, decolorizafion
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.
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SubjectTerms brilliant red B
decolorization
gas-liquid diaphragm discharge
应用
放电气体
放电特性
气液
水溶液
脱色率
艳红
隔膜
Title Characteristics of gas-liquid diaphragm discharge and its application on decolorization of brilliant red B in aqueous solution
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