Optimized photodegradation of Reactive Blue 19 on TiO2 and ZnO suspensions
Optimized photodegradation of Reactive Blue 19 on TiO2 and ZnO suspensions
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DOI：
10.1016/s0920-5861(02)00222-5
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发表时间：
2002-11-15
期刊：
影响因子：
5.3
通讯作者：
Mansilla, HD
中科院分区：
文献类型：
--
作者：
Lizama, C;Freer, J;Mansilla, HD
研究了以TiO 2和ZnO为催化剂的水悬浮液体系对纺织品蒽醌染料活性蓝19（RB-19）的光催化脱色作用。该反应可以在数学上描述为参数pH值，催化剂的量和染料浓度的函数，通过使用响应面方法建模。确定了各反应体系的催化剂浓度和pH值的优化值。在优化的条件下，在41循环反应器中进行反应时，ZnO表现出比TiO 2更大的降解活性。每阶电能的品质因数（EE/O）允许确定将颜色降低一个数量级的电能成本对于TiO 2高三倍。在这两种反应体系中，急性毒性在辐照的初始阶段从零发展到约50个毒性单位，在反应30分钟后消耗到最小值。(C)2002 Elsevier Science B. V.保留所有权利。
The photocatalytic discoloration of Reactive Blue 19 (RB-19), a textile anthraquinone dye, were investigated in aqueous suspensions containing TiO2 or ZnO as catalysts. The reactions can be mathematically described as a function of parameters pH, amount of catalyst and dye concentration being modeled by the use of response surfaces methodology. Optimized values for the concentration of the catalyst and the pH for each reaction systems were determined. ZnO showed greater degradation activity than TiO2 when the reaction was carried out in a 41 circulating reactor under optimized conditions. The figure-of-merit electric energy per order (EE/O) allows to determine that the electrical energy cost of reducing the color by one order of magnitude was three times higher for TiO2. In both reaction systems, the acute toxicity evolved from zero to around 50 toxicity units in the initial stages of irradiation, depleting to minimal values after 30 min of reaction. (C) 2002 Elsevier Science B.V. All rights reserved.