期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 323, 期 -, 页码 611-620出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2016.09.064
关键词
Advanced oxidation process; Millimetric zero valent iron (mmZVI); Rhodamine B (RhB); Tetrabromobisphenol A (TBBPA); Treatment
资金
- National Natural Science Foundation of China [U1401233]
- Project for Hundreds of Talents of Environmental Protection
- Central fund supporting nonprofit scientific institutes for basic research and development [PM-zx021-201211-110, PM-zx021-201106-021]
In this study, we firstly develop the photo-Fenton-like system with millimetric sponge iron (s-Fe-0), H2O2, visible light (vis, lambda >= 420 nm) and rhodamine B (RhB), and present a comprehensive study concerning the mechanism. Thus, we investigate (1) the adsorption of RhB onto s-Fe-0 (2) the photo-Fenton-like removal of RhB over iron oxides generated from the corrosion of s-Fe-0 (3) the homogeneous photo Fenton removal of RhB over Fe2+ or Fe3+, (4) the Fe3+-RhB complexes, and (5) the photo-Fenton-like removal of tetrabromobisphenol A (TBBPA). The results show that neither the adsorption process over s-Fe-0 nor the photo-Fenton-like process over FeOOH, Fe3O4 and Fe2O3, achieved efficient removal of RhB. For comparison, in homogeneous photo Fenton process, the presence of Fe3+ ions, rather than Fe2+ ions, effectively eliminated RhB. Furthermore, the UV-vis spectra showing new absorbance at similar to 285 nm indicate the complexes of RhB and Fe3+ ions, adopting vis photons to form excited state and further eject one electron via ligand-to-metal charge transfer to activate H2O2. Additionally, efficient TBBPA removal was obtained only in the presence of RhB. Accordingly, the s-Fe-0-based photo-Fenton-like process assisted with dyestuff wastewater is promising for removing a series of persistent organic pollutants. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据