Photocatalytic decolorization and degradation of dye solutions and wastewaters in the presence of titanium dioxide
Photocatalytic decolorization and degradation of dye solutions and wastewaters in the presence of titanium dioxide
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DOI：
10.1016/j.jhazmat.2005.11.017
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发表时间：
2006-08-10
影响因子：
13.6
通讯作者：
Tsiridis, V.
中科院分区：
文献类型：
--
作者：
Bizani, E.;Fytianos, K.;Tsiridis, V.
在这项研究中，两个商业偶氮染料在TiO 2悬浮液作为光催化剂的存在下，光催化降解进行了研究。染料的降解遵循准一级动力学根据Langmuir-Hinshelwood模型。在一定的实验条件下，在TiO 2 P-25的存在下，在100分钟的光照内实现脱色，而在TiO 2 Hakkat UV-100的存在下，在不到50分钟的光照下完成完全的颜色消失。考察了催化剂种类、用量、染料初始浓度等因素对降解过程的影响。有机碳的矿化也通过测量染料溶液的溶解有机碳（DOC）进行了评价。此外，通过使用Microtox生物测定法（费氏弧菌）检查了经脱氯处理的染料溶液的毒性。最后，为了检验该方法对更复杂的基质的有效性，还使用真实的纺织废水进行了实验。(c)2005 Elsevier B. V.保留所有权利。
In this study, the photocatalytic degradation of two commercial azo dyes in the presence of TiO2 suspensions as photocatalyst has been investigated. The degradation of the dyes follows a pseudo-first-order kinetics according to the Langmuir-Hinshelwood model. Under the certain experimental conditions, in the presence of TiO2 P-25 decolorization is achieved within 100 min of illumination, while in the presence of TiO2 Hombikat UV-100 complete color disappearance is accomplished in less than 50 min of light exposure. The influence of various parameters, such as the type and mass of the catalyst, the initial concentration of the dye, etc. on the degradation process was examined. The mineralization of organic carbon was also evaluated by measuring the dissolved organic carbon (DOC) of the dye solutions. Moreover, the toxic properties of the dye solutions treated by photocatalysis were examined by the use of a Microtox bioassay (Vibrio fischeri). Finally, experiments using real textile wastewater were also carried out, in order to examine the effectiveness of the method to a more complex substrate. (c) 2005 Elsevier B.V. All rights reserved.