TiO2-UV photocatalytic oxidation of Reactive Yellow 14:: Effect of operational parameters
TiO2-UV photocatalytic oxidation of Reactive Yellow 14:: Effect of operational parameters
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DOI：
10.1016/j.jhazmat.2005.11.022
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发表时间：
2006-07-31
影响因子：
13.6
通讯作者：
Swaminathan, M.
中科院分区：
文献类型：
--
作者：
Muruganandham, M.;Swaminathan, M.
以TiO 2为光催化剂，在365 nm的UV-A辐射下，对水溶液中的偶氮染料活性黄（RY 14）进行了光催化脱色降解研究。考察了催化剂负载量、辐射强度和染料初始浓度等因素对染料去除效果的影响，确定了最佳工艺条件。并对其脱色和降解动力学进行了分析。两者均遵循修正的Langmuir-Hinshelwood动力学（L-H）模型。研究了电子受体对光氧化的影响，发现H_2O_2、（NH_4）（2）S_2O_8、KBrO_3在一定剂量范围内对光氧化的脱色和降解均有促进作用，超过一定剂量后，其促进作用可忽略不计。但在NaCl或Na 2CO 3存在下观察到负面影响。(c)2005 Elsevier B. V.保留所有权利。
The photocatalytic decolourisation and degradation of an azo dye Reactive Yellow (RY14) in aqueous solution with TiO2 as photocatalyst in slurry form has been carried out using UV-A radiation (365 nm). The effect of various parameters such as catalyst loading, radiation intensity and initial dye concentration on the dye removal was investigated to find optimum conditions. The decolourisation and degradation kinetics have been analysed. Both follow modified Langmuir-Hinshelwood kinetic (L-H) model. A study on the effect of electron acceptors on photooxidation reveals that both decolourisation and degradation increase in the presence of H2O2, (NH4)(2)S2O8, KBrO3, to certain dosage beyond which the enhancement effect is negligible. But negative effects are observed in the presence of NaCl or Na2CO3. (c) 2005 Elsevier B.V. All rights reserved.