Ultrasonic irradiation enhanced degradation of azo dye on MnO2

被引：31

作者：

Ge, HT ^{[1
]}

Qu, HH ^{[1
]}

机构：

[1] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2004年 / 47卷 / 02期

关键词：

manganese dioxide; acid red B; ultrasound; decolorization; mineralization;

D O I：

10.1016/j.apcatb.2003.08.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Degradation of azo dye Acid Red B (ARB) on MnO2 enhanced by ultrasonic irradiation has been investigated. The effect of initial pH, anions (Cl-, NO3-, SO42-), and saturated gases (argon/oxygen) has been studied. The decolorization efficiency of the dye on MnO2 was strongly pH dependent and increased with decreasing pH. SO42- and NO3- inhibited the adsorption of ARB over MnO2 dramatically, suggesting competitive nature for adsorption with the dye. Ultrasonic irradiation enhanced degradation of the dye both for decolorization and mineralization. The formation of H2O2 and the decrease of MnO2 particle size during ultrasonic irradiation were also discussed. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：133 / 140

页数：8

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