Behnajady M A, Modirshahla N, Shokri M
Department of Applied Chemistry, Islamic Azad University, Tabriz Branch, P.O. Box 1655, Tabriz, IR, Iran.
Chemosphere. 2004 Apr;55(1):129-34. doi: 10.1016/j.chemosphere.2003.10.054.
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.
在紫外光/过氧化氢工艺中研究了阴离子酸性染料酸性橙7（AO7）的光降解。单独使用过氧化氢和紫外光时，它们的影响可忽略不计。AO7的去除效率对初始过氧化氢浓度、初始AO7浓度、pH值和不同光源等操作参数敏感。添加乙醇作为电子清除剂会抑制AO7的光降解。AO7浓度与时间的半对数图（t<30分钟）呈线性，表明为拟一级反应（k（最佳）=0.105 min(-1)）。提出了一个与实验结果相符的简单动力学模型。
