Photocatalytic degradation of sulfonylurea herbicides in aqueous TiO2

被引：96

作者：

Vulliet, E

Emmelin, C

Chovelon, JM

Guillard, C

Herrmann, JM

机构：

[1] Univ Lyon 1, UMR 5634, Lab Applicat Chim Environm, F-69622 Villeurbanne, France

[2] Ecole Cent Lyon, Lab Ingn & Fonctionnalisat Surfaces, UMR 5621, F-69131 Ecully, France

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2002年 / 38卷 / 02期

关键词：

cinosulfuron; triasulfuron; sulfonylurea; photocatalysis; TiO2;

D O I：

10.1016/S0926-3373(02)00035-8

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 degradation of two sulfonylurea (Sus) herbicides, cinosulfuron and triasulfuron, has been investigated in aqueous solutions containing TiO2 suspensions as photocatalyst. Cinosulfuron and triasulfuron have been rapidly transformed with different kinetic orders (1 and 1/2, respectively). The calculated quantum efficiencies (phi) of both Sus have been found similar (0.73%). Intermediate products were identified using HPLC-UV or HPLC-MS analyses. A photocatalytic degradation pathway has been proposed, leading to cyanuric acid as a final product. This molecule is known as resistant to all oxidation technologies. (C) 2002 Elsevier Science B.V. All rights reserved.

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页码：127 / 137

页数：11

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