Environmental application of millimetre-scale sponge iron (s-Fe0) partiCles (IV): New insights into visible light photo-Fenton-like process with optimum dosage of H2O2 and RhB photosensitizers

被引：55

作者：

Ju, Yongming ^{[1
,2
,3
]}

Yu, Yunjiang ^{[1
]}

Wang, Xiaoyan ^{[1
]}

Xiang, Mingdeng ^{[1
]}

Li, Liangzhong ^{[1
]}

Deng, Dongyang ^{[1
,2
,3
]}

Dionysiou, Dionysios D. ^{[4
]}

机构：

[1] Minist Environm Protect, South China Inst Environm Sci, Guangzhou 510655, Guangdong, Peoples R China

[2] State Environm Dioxin Monitoring Ctr, South China Subctr, Innovat Lab Environm Funct Mat & Environm Applica, Guangzhou 510655, Guangdong, Peoples R China

[3] South China Inst Environm Sci, Guangdong Key Lab Agroenvironm Integrated Control, Guangzhou 510655, Guangdong, Peoples R China

[4] Univ Cincinnati, Environm Engn & Sci Program, DBCEE, Cincinnati, OH 45221 USA

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2017年 / 323卷

基金：

中国国家自然科学基金;

关键词：

Advanced oxidation process; Millimetric zero valent iron (mmZVI); Rhodamine B (RhB); Tetrabromobisphenol A (TBBPA); Treatment; ADVANCED OXIDATION PROCESSES; ACID ORANGE 7; RHODAMINE-B; AQUEOUS-SOLUTION; HETEROGENEOUS CATALYST; EFFICIENT DEGRADATION; WATER; DYE; DECOLORIZATION; MINERALIZATION;

D O I：

10.1016/j.jhazmat.2016.09.064

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页码：611 / 620

页数：10

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