Solar photocatalytic mineralization of commercial pesticides:: Oxamyl

被引：54

作者：

Malato, S ^{[1
]}

Blanco, J ^{[1
]}

Richter, C ^{[1
]}

Fernández, P ^{[1
]}

Maldonado, MI ^{[1
]}

机构：

[1] PSA, Tabernas 04200, Almeria, Spain

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2000年 / 64卷 / 01期

关键词：

sunlight; photocatalysis; titanium dioxide; pesticide; oxamyl; mineralization; peroxydisulphate;

D O I：

10.1016/S0927-0248(00)00037-4

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

One of the most important sources of high-pesticide-content polluted waters results from the rinsing of pesticide containers. In this paper, a pre-industrial solar TiO(2)-photocatalytic treatment is used to prevent such pollution of continental waters and a commercial pesticide (Vydate L(R), 24% oxamyl) is used as a model to demonstrate the practical application of the treatment. A method for comparing photocatalytic solar reactor efficiency based on solar UV measurement is proposed. Total organic carbon (TOC) analysis is applied to confirm the total mineralization of the contaminants. When photocatalytic treatment is begun, the concentration of organics in water is TOC similar or equal to 100 mg l(-1). Oxamyl is completely photodegraded, but mineralization is slow with illuminated TiO(2) only. The additional use of an adequate electron scavenger (peroxydisulphate) clearly enhances oxidation of the pesticide, its intermediates and the other organics present in the commercial formulation to CO(2). (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：1 / 14

页数：14

共 27 条

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