Degradation of anionic dye eosin by glow discharge electrolysis plasma

被引：13

作者：

Gao, Jinzhang ^{[1
]}

Ma, Dongping ^{[1
]}

Guo, Xiao ^{[1
]}

Wang, Aixiang ^{[1
]}

Fu, Yan ^{[1
]}

Wu, Jianlin ^{[1
]}

Yang, Wu ^{[1
]}

机构：

[1] College of Chemistry and Chemical Engineering, Northwest Normal University

来源：

Plasma Science and Technology | 2008年 / 10卷 / 04期

关键词：

Degradation kinetics; Dyeing wastewater; Eosin; Glow discharge electrolysis plasma; N; N-dimethyl-p-nitrosoaniline; (RNO);

D O I：

10.1088/1009-0630/10/4/05

中图分类号：

学科分类号：

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. Fe2+ 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 ko 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.

引用

页码：422 / 427

页数：5

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