Decolorization effects of six azo dyes by O3, UV/O3 and UV/H2O2 processes

被引：156

作者：

Shu, HY ^{[1
]}

Chang, MC ^{[1
]}

机构：

[1] Hungkuang Univ, Dept Environm Engn, Taichung 433, Taiwan

来源：

DYES AND PIGMENTS | 2005年 / 65卷 / 01期

关键词：

ultraviolet; advanced oxidation processes (AOPs); azo dye; decolorization; ozone; hydrogen peroxide;

D O I：

10.1016/j.dyepig.2004.06.014

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The decolorization of six azo dyes by means of O-3, UV/O-3 and UV/H2O2 processes was performed successfully with all of the tested dyes decolorizing effectively. However, dyes with dis-azo links (i.e. C.I. Direct Yellow 4 and C.I. Acid Black 1) were more difficult to decolorize than mono-azo dyes. During the processes, the pH value changed from 5.4 to 3.5, thus becoming more acidic. The increased acidity resulted from the oxidation and breakdown of the R+-(SO3-) bond in the azo dye structure. The removal of 95% color was the level chosen to compare the energy efficiency. The results showed that UV/H2O2 used the most energy, 5-11 times, than that of UV/O-3 process, and 265-520 times more than that of the ozonation process. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：25 / 31

页数：7

共 16 条

[1] DETERMINATION OF SULFONATED AZO DYES BY LIQUID-CHROMATOGRAPHY ATMOSPHERIC-PRESSURE IONIZATION MASS-SPECTROMETRY [J].

BRUINS, AP ;

WEIDOLF, LOG ;

HENION, JD ;

BUDDE, WL .

ANALYTICAL CHEMISTRY, 1987, 59 (22) :2647-2652

[2]

Cisneros RL, 2002, CHEMOSPHERE, V48, P393

[3] Mechanism and kinetic model for the decolorization of the azo dye Reactive Black 5 by hydrogen peroxide and UV radiation [J].

El-Dein, AM ;

Libra, JA ;

Wiesmann, U .

CHEMOSPHERE, 2003, 52 (06) :1069-1077

[4] UV-H2O2 oxidation of monoazo dyes in aqueous media:: a kinetic study [J].

Galindo, C ;

Kalt, A .

DYES AND PIGMENTS, 1999, 40 (01) :27-35

[5]

HAFEZ AI, 1989, WASTE MANAGE, V9, P41

[6] Critical effect of hydrogen peroxide in photochemical dye degradation [J].

Ince, NH .

WATER RESEARCH, 1999, 33 (04) :1080-1084

[7]

Ince NH, 1997, ENVIRON TECHNOL, V18, P179

[8]

Masschelein W., 1977, Water Sew. Work, V124, P69

[9] Kinetics of decolorization and mineralization of reactive azo dyes in aqueous solution by the UV/H2O2 oxidation [J].

Neamtu, M ;

Siminiceanu, H ;

Yediler, A ;

Kettrup, A .

DYES AND PIGMENTS, 2002, 53 (02) :93-99

[10] ECONOMIC-ASSESSMENT OF MEMBRANE PROCESSES FOR WATER AND WASTE-WATER TREATMENT [J].

OWEN, G ;

BANDI, M ;

HOWELL, JA ;

CHURCHHOUSE, SJ .

JOURNAL OF MEMBRANE SCIENCE, 1995, 102 :77-91

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