Enhanced photocatalytic-electrolytic degradation of Reactive Brilliant Red X-3B in the presence of water jet cavitation
Enhanced photocatalytic-electrolytic degradation of Reactive Brilliant Red X-3B in the presence of water jet cavitation
复制标题
在水射流空化存在下增强活性艳红 X-3B 的光催化电解降解
DOI：
10.1016/j.ultsonch.2014.10.005
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发表时间：
2015-03-01
影响因子：
8.4
通讯作者：
Wang, Yalin
中科院分区：
文献类型：
--
作者：
Wang, Xiaoning;Jia, Jinping;Wang, Yalin
采用光催化、电解、水射流空化（WJC）单独及联合降解偶氮染料活性艳红X-3B（X-3B）。实验在4.0 L水溶液中进行，具有不同的初始染料浓度，二氧化钛剂量，和溶液pH值。WJC大大增加了光催化，电解和光催化电解率的染料去除。实验结果表明，在WJC作用下，X-3B的一级脱色率是在机械搅拌作用下的1.6-2.9倍。速率的提高可能主要归因于电极上的扩散层厚度的减小以及由于WJC的化学和物理效应而引起的光催化剂颗粒的解聚。在80 mg/L的X-3B溶液、100 mg/L的TiO 2投加量和pH 6.3的条件下，光催化-电解结合水射流处理90 min，色度和化学需氧量（CODcr）的去除率分别为97%和71%。在此过程中，染料的偶氮基团和萘，苯和三嗪结构可以被破坏。工业纺织废水进行了调查，并观察到一个积极的协同效应之间的光催化-电解系统和WJC考虑颜色去除。(C)© 2014 Elsevier B. V.保留所有权利。
Photocatalysis, electrolysis, water jet cavitation (WJC), alone and in combinations were applied to degrade an azo dye, Reactive Brilliant Red X-3B (X-3B). Experiments were conducted in a 4.0 L aqueous solution with different initial dye concentrations, TiO2 dose, and solution pH. WJC substantially increased the photocatalytic, electrolytic and photocatalytic-electrolytic rates of the dye removal. The observed first-order rate of X-3B decolorization in the process of combined photocatalysis and electrolysis coupled with WJC was 1.6-2.9 times of that in the process of combined photocatalysis and electrolysis coupled with mechanical stirring. The rate enhancements may be attributed primarily to the reduced diffusion layer thickness on the electrodes and the deagglomeration of photocatalyst particles due to the chemical and physical effects of WJC. Under the conditions of 80 mg/L X-3B solution, 100 mg/L TiO2 dose and solution pH 6.3, 97% and 71% of color and chemical oxygen demand (CODcr) were removed, respectively, within 90-min photocatalytic-electrolytic treatment coupled with WJC. During this process, azo groups and naphthalene, benzene and triazine structures of the dye can be destroyed. Industrial textile effluent was also investigated, and a positive synergistic effect between photocatalytic-electrolytic system and WJC was observed considering color removal. (C) 2014 Elsevier B.V. All rights reserved.