US EPA

1504714 

Journal Article 

Photocatalytic oxidation of pesticide rinsate 

Kuo, WS 

2002 

Yes 

Journal of Environmental Science and Health, Part B: Pesticides, Food Contaminants, and Agricultural Wastes
ISSN: 0360-1234
EISSN: 1532-4109 

37 

1 

65-74 

English 

11990360 

10.1081/PFC-120002898 

WOS:000175098400006 

Pesticide rinsate has been considered as one of the major threats for the environment. In this study, photocatalysts such as TiO2 and O3 were used to promote the efficiency of direct UV photolysis to prevent such wastewater pollution. Carbofuran (a carbamate pesticide) and mevinphos (an organophosphate pesticide) with a concentration of 100 mg/L were selected as the test pesticide rinsates. Parent pesticide compound, COD, and microtoxicity analysis were employed to investigate the effect of photocatalyst on the degradation efficiency of pesticide in rinsate. It was found that the photocatalytic oxidation process (UV/O3, UV/TiO2) showed much higher COD removal and microtoxicity reduction efficiency for pesticide rinsate than did direct UV photolysis under the imposed conditions, suggesting that photocatalytic oxidation processes such as UV/O3 and UV/TiO2 could be a better alternative to treat pesticide rinsate. In addition, it was noted that increasing the initial pH of mevinphos rinsate to a basic level was required to reach higher COD removal efficiency and positive microtoxicity reduction efficiency while it was not necessary for the treatment of carbofuran rinsate. 

Microtoxicity; Pesticide rinsate; Photocatalytic oxidation; Degradation; pH effects; Photocatalysis; Photolysis; Photooxidation; Toxicity; Wastewater; Water pollution; Ultraviolet photolysis; Pesticides; carbofuran; mevinphos; ozone; pesticide; titanium dioxide; oxidation; pesticide; photolysis; wastewater treatment; article; catalysis; chemical oxygen demand; environment; pH; photolysis; photooxidation; reaction time; waste water; Carbofuran; Hydrogen-Ion Concentration; Insecticides; Mevinphos; Oxidation-Reduction; Ozone; Pesticide Residues; Photolysis; Titanium; Ultraviolet Rays; Water Pollution, Chemical