Fe(III)-Citrate-Complex-Induced Photooxidation of 3-Methylphenol in Aqueous Solution

被引:60
作者
Seraghni, N. [1 ]
Belattar, S. [1 ]
Mameri, Y. [1 ]
Debbache, N. [1 ]
Sehili, T. [1 ]
机构
[1] Univ Mentouri, Lab Sci & Technol Environm LSTE, Dept Chim, Fac Sci Exactes, Constantine, Algeria
关键词
CITRIC-ACID; FERRIC ION; DEGRADATION; COMPLEXES; RADICALS; IRON; PHOTODEGRADATION; PHOTOLYSIS; IRON(III); FE(III);
D O I
10.1155/2012/630425
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The photodegradation process of m-cresol (3-methylphenol), induced by Fe(III)-Cit complex, was investigated upon irradiation at 365 nm in natural water. The composition and photochemical properties of Fe(III)-Cit complex were studied by UV-Visible absorption spectrophotometer for optimizing the stoichiometry of the complex and photolysis under irradiation at 365 nm, respectively. A dark investigation of the system was performed before studying the photochemical behavior. The photooxidation efficiencies of m-cresol were dependent on the pH value, optimized at pH 2.86, oxygen, initial concentrations of Fe(III)-Cit complex, and m-cresol. Additionally, to look into the mechanism of m-cresol degradation using Fe(III)-Cit, tertiobutanol alcohol was used as scavenger for hydroxyl radicals and the result suggested that hydroxyl radical attack was the main pathway of m-cresol degradation. Besides, oxygen can enhance the photolysis of Fe(III)-Citrate complex by trapping the electron on the carbon centered radical formed after the photoredox process. Then O-2(center dot-) formed reacts rapidly leading finally to formation of (OH)-O-center dot radical. In absence of oxygen, less reactive species are formed; consequently the disappearance of m-cresol was strongly inhibited. Our work shows that the presence of Fe(III)-Citrate complex could have a considerable impact on the fate of organic pollutant in aquatic environment.
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页数:10
相关论文
共 39 条
[1]   Impact of iron-complex (Fe(III)-NTA) on photoinduced degradation of 4-chlorophenol in aqueous solution [J].
Abida, O ;
Mailhot, G ;
Litter, M ;
Bolte, M .
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, 2006, 5 (04) :395-402
[2]   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
[3]   REACTIVITY OF HO2/O-2 RADICALS IN AQUEOUS-SOLUTION [J].
BIELSKI, BHJ ;
CABELLI, DE ;
ARUDI, RL ;
ROSS, AB .
JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, 1985, 14 (04) :1041-1100
[4]   Iron (III) aquacomplexes as effective photocatalysts for the degradation of pesticides in homogeneous aqueous solutions [J].
Catastini, C ;
Sarakha, M ;
Mailhot, G ;
Bolte, M .
SCIENCE OF THE TOTAL ENVIRONMENT, 2002, 298 (1-3) :219-228
[5]   Photodegradation of glyphosate in the ferrioxalate system [J].
Chen, Yong ;
Wu, Feng ;
Lin, Yixin ;
Deng, Nansheng ;
Bazhin, Nikolai ;
Glebov, Evgeni .
JOURNAL OF HAZARDOUS MATERIALS, 2007, 148 (1-2) :360-365
[6]   THE CHEMICAL-COMPOSITION OF MIXED WASTES - ANALYSIS OF THE PHOTOLYSIS PRODUCTS OF ORGANIC-LIGANDS [J].
COMEL, A ;
GUIOCHON, G .
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES, 1994, 181 (02) :373-384
[7]   Fe(III) promoted LAS (linear alkylbenzenesulfonate) removal from waters [J].
Debbache, Nadra ;
Djebbar, Kamel ;
Lavedrine, Bernadette ;
Mailhot, Gilles ;
Bolte, Michele .
CHEMOSPHERE, 2008, 72 (03) :457-464
[8]   Ferric citrate-induced photodegradation of dyes in aqueous solutions [J].
Deng, NS ;
Wu, F ;
Luo, F ;
Xiao, M .
CHEMOSPHERE, 1998, 36 (15) :3101-3112
[9]  
Domenech X., 2004, ELIMINACION CONTAMIN, P7
[10]   PHOTOLYSIS OF FE(III)-HYDROXY COMPLEXES AS SOURCES OF OH RADICALS IN CLOUDS, FOG AND RAIN [J].
FAUST, BC ;
HOIGNE, J .
ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS, 1990, 24 (01) :79-89