Department of Chemical Engineering, National Cheng Kung University, Tainan City 701, Taiwan.
J Hazard Mater. 2011 Apr 15;188(1-3):357-62. doi: 10.1016/j.jhazmat.2011.01.131. Epub 2011 Feb 4.
The photocatalytic activity of a brick grain-supported iron oxide (denoted as B1) was tested for its activity to degrade Reactive Black 5 (RB5) in the presence of oxalic acid. B1 was obtained as a solid waste from a wastewater treatment plant, and characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray powder diffraction (XRD) and N(2) adsorption/desorption isotherm analyses. The decolorization experiments were performed in a fluidized bed reactor with aeration under UV-A irradiation (λ = 365 nm). The effects of various factors such as solution pH, concentration of oxalic acid and dissolved oxygen on the decolorization of RB5 were evaluated considering the contributions of adsorption and photo-catalytic degradation. The role of dissolved iron in the removal of RB5 and the stability of B1 were also examined. In addition, the removal of TOC during the photo-catalytic reaction was monitored.
砖粒负载氧化铁（记为 B1）的光催化活性在草酸存在下用于降解活性黑 5（RB5）的活性进行了测试。B1 是从污水处理厂获得的一种固体废物，通过扫描电子显微镜（SEM）、能谱（EDS）、X 射线粉末衍射（XRD）和 N（2）吸附/解吸等温线分析进行了表征。在通气条件下，通过 UV-A 照射（λ = 365nm）在流化床反应器中进行脱色实验。考虑到吸附和光催化降解的贡献，评估了溶液 pH、草酸浓度和溶解氧等各种因素对 RB5 脱色的影响。还研究了溶解铁在 RB5 去除中的作用以及 B1 的稳定性。此外，还监测了光催化反应过程中 TOC 的去除情况。
