Degradation of Anionic Dye Eosin by Glow Discharge Electrolysis Plasma  

作　　者：高锦章 马东平 郭晓 王爱香 付燕 吴建林 杨武 

机构地区：[1]College of Chemistry & Chemical Engineering,Northwest Normal University,Lanzhou 730070,China

出　　处：《Plasma Science and Technology》2008年第4期422-427,共6页等离子体科学和技术（英文版）

基　　金：the Key Projects of Science and Technology of Education Ministry(00250);the Natural Science Foundation of Gansu Province(3ZS041-A25-028);the Projects of KJCXGC-01,NWNU;Cansu Key Lab of Polymer Materials,China

摘　　要：This paper describes a novel method for the degradation of eosin by using glow discharge electrolysis （GDE）. The effects of various parameters on the removal efficiency were studied. It was found that the eosin degradation could be raised considerably by increasing the applied voltage and the initial concentration, or by decreasing pH of the aqueous solution. Fe^2＋ ion had an evident accelerating effect on the eosin degradation. The degradation process of eosin obeyed a pseudo-first-order reaction. The relationship between the degradation rate constant k and the reaction temperature T could be expressed by Arrhenius equation with which the apparent activation energy Ea of 14.110 kJ· mol^-1 and the pre-exponential factor k0 of 2.065× 10^-1 min^-1 were obtained, too. The determination of hydroxyl radical was carried out by using N, N-dimethyl -p-nitrosoaniline （RNO） as a scavenger. The results showed that the hydroxyl radical plays an important role in the degradation process.This paper describes a novel method for the degradation of eosin by using glow discharge electrolysis （GDE）. The effects of various parameters on the removal efficiency were studied. It was found that the eosin degradation could be raised considerably by increasing the applied voltage and the initial concentration, or by decreasing pH of the aqueous solution. Fe^2＋ ion had an evident accelerating effect on the eosin degradation. The degradation process of eosin obeyed a pseudo-first-order reaction. The relationship between the degradation rate constant k and the reaction temperature T could be expressed by Arrhenius equation with which the apparent activation energy Ea of 14.110 kJ· mol^-1 and the pre-exponential factor k0 of 2.065× 10^-1 min^-1 were obtained, too. The determination of hydroxyl radical was carried out by using N, N-dimethyl -p-nitrosoaniline （RNO） as a scavenger. The results showed that the hydroxyl radical plays an important role in the degradation process.

关 键 词：glow discharge electrolysis plasma EOSIN N N-dimethyl-p-nitrosoaniline （RNO） dyeing wastewater degradation kinetics 

分 类 号：X703[环境科学与工程—环境工程]