Photocatalytic degradation of the herbicide "paraquat"

被引：74

作者：

Moctezuma, E ^{[1
]}

Leyva, E ^{[1
]}

Monreal, E ^{[1
]}

Villegas, N ^{[1
]}

Infante, D ^{[1
]}

机构：

[1] Unic Autonoma San Luis Potosi, San Luis Potosi 78210, SLP, Mexico

来源：

CHEMOSPHERE | 1999年 / 39卷 / 03期

关键词：

paraquat; herbicides; photocatalysis; TiO2;

D O I：

10.1016/S0045-6535(98)00599-2

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The photocatalytic degradation of pure paraquat (1,1'-dimethyl-4,4'-bipyridinium dichloride) aqueous solutions with UV light over titanium oxide was investigated. Experimental results have confirmed that paraquat is slowly degraded by direct photolysis in the presence of dissolved oxygen. Addition of TiO2 to the reaction system substantially increases the initial rate of reaction and the overall conversion of paraquat. Complete photocatalytic degradation of paraquat at high pH values was found to occur in less than three hours of reaction. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：511 / 517

页数：7

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