Trichloroethylene Transformation in Aerobic Pyrite Suspension: Pathways and Kinetic Modeling

被引：54

作者：

Pham, Hoa T. ^{[1
]}

Suto, Koichi ^{[1
]}

Inoue, Chihiro ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Environm Studies, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2009年 / 43卷 / 17期

基金：

日本学术振兴会;

关键词：

ELECTROCHEMICAL OXIDATION; HYDROXYL RADICALS; RATE CONSTANTS; DECOMPOSITION; WATER; DECHLORINATION; ELECTRODES; MECHANISM; MINERALS; RNA;

D O I：

10.1021/es900623u

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The pathways and kinetics of trichloroethylene (TCE) degradation in aerobic pyrite suspension were investigated. The detection of hydroxyl radical in aqueous pyrite suspension suggested that TCE was degraded by this strong oxidant. The reaction pathways of TCE degradation were proposed in which the degradation of TCE to formic acid and finally to CO2 was the main route. Degradation of TCE to oxalic acid and to dichloroacetic acid were found as minor pathways. Degradation rates of TCE to formic acid, glyoxylic acid, and dichloroacetic acid were obtained using kinetic model at 1.2 x 10(-2), 9.8 X 10(-4) and 4.6 x 10(-4) h(-1), respectively.

引用

页码：6744 / 6749

页数：6

共 35 条

[1] A mechanism for the production of hydroxyl radical at surface defect sites on pyrite [J].

Borda, MJ ;

Elsetinow, AR ;

Strongin, DR ;

Schoonen, MA .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2003, 67 (05) :935-939

[2] 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

[3] Mechanism of aqueous decomposition of trichloroethylene oxide [J].

Cai, HL ;

Guengerich, FP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (50) :11656-11663

[4] Electrochemical oxidation of several chlorophenols on diamond electrodes -: Part I.: Reaction mechanism [J].

Cañizares, P ;

García-Gómez, J ;

Sáez, C ;

Rodrigo, MA .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 2003, 33 (10) :917-927

[5] Using yeast RNA as a probe for generation of hydroxyl radicals by earth materials [J].

Cohn, CA ;

Laffers, R ;

Schoonen, MAA .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2006, 40 (08) :2838-2843

[6]

Cohn CA, 2005, GEOCHEM T, V6, P47, DOI [10.1063/1.1935449, 10.1186/1467-4866-6-47]

[7] RNA decomposition by pyrite-induced radicals and possible role of lipids during the emergence of life [J].

Cohn, CA ;

Borda, MJ ;

Schoonen, MA .

EARTH AND PLANETARY SCIENCE LETTERS, 2004, 225 (3-4) :271-278

[8] Comparison of fluorescence-based techniques for the quantification of particle-induced hydroxyl radicals [J].

Cohn, Corey A. ;

Simon, Sanford R. ;

Schoonen, Martin A. A. .

PARTICLE AND FIBRE TOXICOLOGY, 2008, 5 (1)

[9] Pyrite dissolution in acidic media [J].

Descostes, M ;

Vitorge, P ;

Beaucaire, C .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2004, 68 (22) :4559-4569

[10] Electro-catalytic oxidation of phenol on several metal-oxide electrodes in aqueous solution [J].

Feng, YJ ;

Li, XY .

WATER RESEARCH, 2003, 37 (10) :2399-2407

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