UV/H2O2 treatment of Rhodamine B in aqueous solution: Influence of operational parameters and kinetic modeling
UV/H2O2 treatment of Rhodamine B in aqueous solution: Influence of operational parameters and kinetic modeling
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DOI：
10.1016/j.desal.2007.11.012
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发表时间：
2008-09-30
期刊：
影响因子：
9.9
通讯作者：
Dorraji, M. S. Seyed
中科院分区：
文献类型：
--
作者：
Daneshvar, N.;Behnajady, M. A.;Dorraji, M. S. Seyed
在 H2O2 存在下，在间歇式光反应器中以不同的光强度研究了罗丹明 B (RB) 的脱色和降解。 H2O2 和紫外线单独使用时的影响可以忽略不计。 RB 的去除效率对 H2O2 和 RB 的初始浓度、初始 pH 值和光强度等操作参数敏感。结果表明，向染料溶液中添加无机离子和醇作为羟基自由基清除剂，过程效率会降低。 RB 浓度与时间的半对数图是线性的，表明脱色和降解过程是伪一级反应。提出了一个简单的动力学模型，证实了伪一级反应。计算了 RB 溶液脱色和降解的每阶电能 (EE/O) 值。结果表明，采用最佳过氧化氢浓度可以降低 EE/O。
The decolorization and degradation of Rhodamine B (RB) were investigated using UV radiation in the presence of H2O2 in a batch photoreactor at different light intensities. H2O2 and UV light have a negligible effect when they were used on their own. Removal efficiency of RB was sensitive to the operational parameters such as initial concentrations of H2O2 and RB, initial pH and light intensity. The results indicated that efficiency of process decreased with addition of inorganic ions and alcohols to the dye solution as hydroxyl radical scavengers. The semi-logarithmic graphs of the concentrations of RB versus time were linear, suggesting pseudo-first order reaction for decolorization and degradation processes. A simple kinetic model is proposed which confirms pseudo-first-order reaction. The electrical energy per order (EE/O) values for decolorization and degradation of RB solution were calculated. Results shows that applying an optimum hydrogen peroxide concentration can reduce the EE/O.