Removal of Rhodamine B under visible irradiation in the presence of Fe0, H2O2, citrate and aeration at circumneutral pH

被引：20
作者：
Hong, Jun [1 ,2 ]
Lu, Sijia [1 ]
Zhang, Caixiang [2 ]
Qi, Shihua [1 ,2 ]
Wang, Yanxin [1 ,2 ]
机构：
[1] China Univ Geosci, Sch Environm Studies, Wuhan 430074, Peoples R China
[2] China Univ Geosci, Minist Educ, Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
来源：
CHEMOSPHERE | 2011年 / 84卷 / 11期
关键词：
RhB; Degradation; Fe-0; H2O2; Citrate; Circumneutral; PHOTO-FENTON DEGRADATION; ZERO-VALENT IRON; AQUEOUS TIO2 DISPERSIONS; REAGENT GENERATION; AS(III) OXIDATION; HYDROGEN-PEROXIDE; ZEROVALENT IRON; AZO-DYE; REDUCTION; LIGHT;
D O I：
10.1016/j.chemosphere.2011.05.056
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A new Vis-Fe-H2O2-citrate-O-2 system comprising zero-valent iron, hydrogen peroxide, citrate anion and aeration at circumneutral pH under visible irradiation was studied. 21 mu mol L-1 of Rhodamine B (RhB) was chosen as the substrate to be tested. Experiments were conducted under conditions of 2.9 mmol L-1 of H2O2, 12.6 g of Fe-0 and 1.0 mmol L-1 of citrate at pH 7.5. Results showed that, in 1 h reaction, 54% of RhB was removed with corresponding 26% of COD reduced. Meanwhile, the amount of released dissolved irons from Fe-0 surface was found to be at a very low level as <5.4 mu mol L-1. Extinguishing tests with isopropanol suggested that RhB oxidation by hydroxyl radicals was the main process taken place in Vis-Fe-0-H2O2-citrate-O-2 system, which accounted for 75% of substrate removal in 3 h reaction. Control and factor influencing experiments showed that the prohibitive extents of individual factor importance on RhB removal followed a decreasing order of Fe > H2O2 > citrate > Vis > O-2. This study showed an excellent system that could remove refractory organic compounds from water in laboratory researches, and also provided a good idea to reduce secondary contamination by dissolved irons in future investigations. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1542 / 1547
页数：6
相关论文
共 38 条
[1]   PHOTOCHEMICAL AND SPECTROSCOPIC STUDIES OF COMPLEXES OF IRON(III) WITH CITRIC-ACID AND OTHER CARBOXYLIC-ACID [J].
ABRAHAMSON, HB ;
REZVANI, AB ;
BRUSHMILLER, JG .
INORGANICA CHIMICA ACTA, 1994, 226 (1-2) :117-127
[2]  
Ai ZH, 2007, J PHYS CHEM C, V111, P4087, DOI [10.1021/jp065559l, 10.1021/jp0655591]
[3]   A statistical experiment design approach for advanced oxidation of Direct Red azo-dye by photo-Fenton treatment [J].
Ay, Filiz ;
Catalkaya, Ebru Cokay ;
Kargi, Fikret .
JOURNAL OF HAZARDOUS MATERIALS, 2009, 162 (01) :230-236
[4]   Abatement of oxalates catalyzed by Fe-silica structured surfaces via cyclic carboxylate intermediates in photo-Fenton reactions [J].
Bozzi, A ;
Yuranova, T ;
Mielczarski, J ;
Lopez, A ;
Kiwi, J .
CHEMICAL COMMUNICATIONS, 2002, (19) :2202-2203
[5]   Phenol degradation using hydroxyl radicals generated from zero-valent iron and hydrogen peroxide [J].
Bremner, DH ;
Burgess, AE ;
Houllemare, D ;
Namkung, KC .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 63 (1-2) :15-19
[6]   CRITICAL-REVIEW OF RATE CONSTANTS FOR REACTIONS OF HYDRATED ELECTRONS, HYDROGEN-ATOMS AND HYDROXYL RADICALS (.OH/.O-) IN AQUEOUS-SOLUTION [J].
BUXTON, GV ;
GREENSTOCK, CL ;
HELMAN, WP ;
ROSS, AB .
JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, 1988, 17 (02) :513-886
[7]   Effect of transition metal ions on the TiO2-assisted photodegradation of dyes under visible irradiation:: A probe for the interfacial electron transfer process and reaction mechanism [J].
Chen, CC ;
Li, XZ ;
Ma, WH ;
Zhao, JC ;
Hidaka, H ;
Serpone, N .
JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (02) :318-324
[8]   Solar degradation of two azo dyes by photocatalysis using Fe(III)-oxalate complexes/H2O2 under different weather conditions [J].
Dong, Yongchun ;
He, Luchun ;
Yang, Min .
DYES AND PIGMENTS, 2008, 77 (02) :343-350
[9]   Neural networks simulation of photo-Fenton degradation of Reactive Blue 4 [J].
Duran, A. ;
Monteagudo, J. M. ;
Mohedano, M. .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 65 (1-2) :127-134
[10]   An analytical overview of processes for removing organic dyes from wastewater effluents [J].
Fernandez, Cristina ;
Soledad Larrechi, M. ;
Pilar Callao, M. .
TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 2010, 29 (10) :1202-1211
1234