SEMICONDUCTOR-SENSITIZED PHOTODEGRADATION OF PESTICIDES IN WATER - THE CASE OF CARBETAMIDE

被引：84

作者：

PERCHERANCIER, JP ^{[1
]}

CHAPELON, R ^{[1
]}

POUYET, B ^{[1
]}

机构：

[1] UNIV LYON 1,ISIDT,PHOTOCHIM APPL LAB,F-69622 VILLEURBANNE,FRANCE

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1995年 / 87卷 / 03期

关键词：

DEGRADATION; KINETICS; METAL OXIDES; PHOTOCATALYSIS; PESTICIDE;

D O I：

10.1016/1010-6030(94)03993-5

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 kinetics of disappearance of carbetamide in water suspensions of TiO2, on illumination at lambda greater than or equal to 310 nm (to avoid direct photolysis), were determined. The photocatalytic reaction was studied by measurement of the initial rate of degradation and the effects of the mass of catalyst and radiant flux were determined. The value of the quantum yield is approximately 0.01. A Langmuir-type relationship between the initial rate and the initial concentration indicates that reaction occurs with the adsorbed substrate. The main intermediates in the degradation are of two types: (a) hydroxylated products and derivatives; (b) products of cyclization of the side chain. The structure of carbetamide allows the formation of these two types of compound, which are explained by the reaction with two different oxidant species: hydroxyl radicals and holes.

引用

页码：261 / 266

页数：6

共 31 条

[1]

AMPO M, 1985, J PHYS CHEM-US, V89, P5017

[2]

AMPO M, 1985, J PHYS CHEM-US, V89, P5689

[3]

AMPO M, 1984, J CHEM SOC CHEM COMM, P644

[4] A STUDY OF THE PRIMARY STEP IN THE PHOTOCHEMICAL DEGRADATION OF ACETIC-ACID AND CHLOROACETIC ACIDS ON A TIO2 PHOTOCATALYST [J].

CHEMSEDDINE, A ;

BOEHM, HP .

JOURNAL OF MOLECULAR CATALYSIS, 1990, 60 (03) :295-311

[5]

Dore M., 1989, CHIMIE OXYDANTS TRAI

[6]

EGERTON TA, 1979, J OIL COLOUR CHEM AS, V62, P386

[7]

FERRADINI C, 1983, BIOL ACTION RAYONNEM, P45

[8] HETEROGENEOUS PHOTOCATALYTIC REACTIONS ON SEMICONDUCTOR-MATERIALS .2. PHOTOELECTROCHEMISTRY AT SEMICONDUCTOR TIO2-INSULATING AROMATIC HYDROCARBON LIQUID INTERFACE [J].

FUJIHIRA, M ;

SATOH, Y ;

OSA, T .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1981, 126 (1-3) :277-281

[9] DESTRUCTION OF POLLUTANTS IN WATER WITH OZONE IN COMBINATION WITH ULTRAVIOLET-RADIATION .2. NATURAL TRIHALOMETHANE PRECURSORS [J].

GLAZE, WH ;

PEYTON, GR ;

LIN, S ;

HUANG, RY ;

BURLESON, JL .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1982, 16 (08) :454-458

[10]

HERMANN JM, 1983, J PHOTOCHEM, V22, P333

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