Photodestruction of Acid Orange 7 (AO7) in aqueous solutions by UV/H2O2:: influence of operational parameters

被引：154

作者：

Behnajady, MA

Modirshahla, N

Shokri, M

机构：

[1] Islamic Azad Univ, Dept Appl Chem, Tabriz Branch, Tabriz, IR, Iran

[2] Islamic Azad Univ, N Tehran Branch, Fac Chem, Dept Appl Chem, Tehran 936, IR, Iran

来源：

CHEMOSPHERE | 2004年 / 55卷 / 01期

关键词：

advanced oxidation processes; photooxidation; UV/H2O2; azo dyes; kinetic model;

D O I：

10.1016/j.chemosphere.2003.10.054

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The photodestruction of Acid Orange 7 (AO7), an anionic acidic dye, was studied in the UV/H2O2 process. H2O2 and UV light have a negligible effect when they were used on their own. Removal efficiency of AO7 was sensitive to the operational parameters such as initial H2O2 Concentration, initial AO7 concentration, pH and different light sources. The photodestruction of AO7 was inhibited by addition of EtOH as an electron scavenger. The semi-logarithmic graphs of the concentration of AO7 versus time (t < 30 min) were linear, suggesting pseudo-first order reactions (k(optimum) = 0.105 min(-1)). A simple kinetic model is proposed which is in agreement with experimental results. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：129 / 134

页数：6

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