Zero-valent iron (ZVI) Fenton oxidation of reactive dye wastewater under UV-C and solar irradiation
Zero-valent iron (ZVI) Fenton oxidation of reactive dye wastewater under UV-C and solar irradiation
复制标题
DOI：
10.1016/j.cej.2012.04.093
复制
发表时间：
2012-07-01
影响因子：
15.1
通讯作者：
Koprivanac, Natalija
中科院分区：
文献类型：
--
作者：
Grcic, Ivana;Papic, Sanja;Koprivanac, Natalija
在这项工作的框架中，使用零价铁 (ZVI) 作为催化剂的光芬顿工艺已应用于含有活性偶氮染料 C.I. 的模型废水的矿化和脱色。活性黑 1 (RB1)。实验在 UV-C 照射下的实验室圆柱形间歇式光反应器 (CBPR) 和完全再循环模式下的船形流动反应器 (BSFR) 的增强配置中进行，暴露在直射阳光下，均带有固定铁。在研究的第一部分中，使用实验混合物设计的概念对 UV-C/ZVI-Fenton 工艺进行了优化，而 Fenton 试剂成分（ZVI 和 H2O2）和 pH 条件被视为三组分混合物。由于混合物设计的严格边界和约束，每个优化周期都会出现设计空间中的单点。在最佳条件下研究了相应的动力学。比较了两种方法：第一种方法采用多相催化途径，而第二种方法假设纯均相催化，探索本体溶液中 Fe(II) 离子由于从 ZVI 表面浸出而发挥的关键作用。通过材料表征和Fe(II)浸出的方法研究了ZVI表面的腐蚀情况。 (c) 2012 Elsevier B.V. 保留所有权利。
In the frame of this work, photo-Fenton processes using the zero-valent iron (ZVI) as a catalyst have been applied for mineralization and decolourization of the model wastewater containing reactive azo dye, C.I. Reactive Black 1 (RB1). Experiments were performed in the enhanced configuration of laboratory cylindrical batch photoreactor under UV-C irradiation (CBPR) and the boat-shaped flow reactor (BSFR) in total recirculation mode, exposed to direct sunlight, both with the immobilized iron.In the first part of the study, optimization of UV-C/ZVI-Fenton process has been performed using the concept of experimental mixture design, whereas Fenton reagent composition (ZVI and H2O2) and pH condition were treated as a three-component mixture. Due to the strict boundaries and constraints of mixture design, a single point in the design space emerged upon each optimization cycle.Corresponding kinetics was studied at optimal conditions. Two approaches has been compared: in the first approach a heterogeneous catalytic pathway has been adopted, while the second approach assumed the pure homogeneous catalysis, exploring the crucial role of the Fe(II) ions in the bulk solution due to its leaching from the ZVI surface. Corrosion of ZVI surface was examined by the means of material characterization and Fe(II) leaching. (c) 2012 Elsevier B.V. All rights reserved.