Oxidation of [Fe(CN)6]4- and reduction of [Fe(CN)6]3- in VUV-irradiated aqueous solutions

被引：24

作者：

László, Z ^{[1
]}

Dombi, A ^{[1
]}

机构：

[1] Univ Szeged, Dept Inorgan & Analyt Chem, H-6701 Szeged, Hungary

来源：

CHEMOSPHERE | 2002年 / 46卷 / 04期

基金：

匈牙利科学研究基金会;

关键词：

VUV photolysis; hexacyanoferrates; H-center dot; (HO2)-H-center dot; O-center dot(2)-; (OH)-O-center dot-radicals;

D O I：

10.1016/S0045-6535(01)00184-9

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Vacuum ultraviolet (VUV) photolysis is one of the straightforward alternatives method among the advanced oxidation processes (AOPs) for the elimination of pollutants from water and air. The VUV photolysis of water produces hydroxyl radicals and hydrogen atoms, which have widely different oxidation and reduction abilities. In this work the oxidation and reduction properties of VUV-irradiated solutions were compared by investigating the reduction of [Fe(CN)(6)](3-) and the oxidation of [Fe(CN)(6)](4-). The rate of oxidation of [Fe(CN)(6)](3-) was found to be practically the same as the reduction rate of [Fe(CN)(6)](4-) in the irradiated oxygen-free solutions under identical conditions. Dissolved oxygen strongly influences the redox properties of this system. (C) 2002 Published by Elsevier Science Ltd.

引用

页码：491 / 494

页数：4

共 15 条

[1] 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

[2] OXIDATIVE-DEGRADATION OF NITROGEN-CONTAINING ORGANIC-COMPOUNDS - VACCUM-ULTRAVIOLET (VUV) PHOTOLYSIS OF AQUEOUS-SOLUTIONS OF 3-AMINO 5-METHYLISOXAZOLE [J].

GONZALEZ, MC ;

HASHEM, TM ;

JAKOB, L ;

BRAUN, AM .

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, 1995, 351 (01) :92-97

[3] VUV PHOTOLYSIS OF AQUEOUS-SOLUTIONS OF NITRATE AND NITRITE [J].

GONZALEZ, MC ;

BRAUN, AM .

RESEARCH ON CHEMICAL INTERMEDIATES, 1995, 21 (8-9) :837-859

[4] VUV-photolysis of aqueous systems: Spatial differentiation between volumes of primary and secondary reactions [J].

Heit, G ;

Braun, AM .

WATER SCIENCE AND TECHNOLOGY, 1997, 35 (04) :25-30

[5]

Kotrly S., 1985, HDB CHEM EQUILIBRIA

[6]

Laszlo Z, 1998, OZONE-SCI ENG, V20, P421

[7]

LASZLO Z, 2002, IN PRESS CHEM PHYS C, V2

[8] PHOTOCHEMICAL PROCESSES FOR WATER-TREATMENT [J].

LEGRINI, O ;

OLIVEROS, E ;

BRAUN, AM .

CHEMICAL REVIEWS, 1993, 93 (02) :671-698

[9]

Malhotra S, 1998, INDIAN J CHEM A, V37, P830

[10] Photochemical methods of water treatment with excimer flow photoreactors and vacuum UV oxidation of an iron-EDTA complex [J].

Oppenlander, T .

CHEMIE INGENIEUR TECHNIK, 1997, 69 (12) :1782-+

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