Sensitized photodecomposition of high disperse pesticide chemicals exposed to sunlight and irradiation from halogen or mercury lamp |
| |
| Affiliation: | 1. Division of Metabolic Disorders, CHOC Children''s, Orange, CA, USA;2. Department of Clinical Chemistry, Laboratory Genetic Metabolic Diseases, Academic Medical Center, Emma Children''s Hospital, University of Amsterdam, Amsterdam, The Netherlands;3. Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA;4. Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA;5. Division of Diagnostic Radiology, CHOC Children''s, Orange, CA, USA;6. Department of Pediatrics, University of California Irvine, Orange, CA, USA |
| |
| Abstract: | The kinetics of sensitized photolysis for four pesticides, deltamethrin (Decis), acrinathrin (Rufast), s-fenvalerate (Sumialpha), and propiconazol (Tilt) in thin films and aerosol particles was investigated under sunlight or the irradiation from halogen or mercury lamp. The peculiarities of principle of the photochemistry of pesticides in high disperse substance state were discussed. The quantum yields of sensitized and direct photolysis were measured, and the phenomenological kinetic mechanism of photolysis was proposed and examined. Four relations between six rate constants of reaction steps of the kinetic mechanism were determined. The use of sensitizers to accelerate the decomposition rates of pesticide pollutants under sunlight could minimize the contamination of agricultural commodities and the adjacent environment. The Shirvanol 2 sensitizer (a by-product of the full treatment of Caspian oils) can regulate decomposition of many pesticides in a wide range of photolysis rates, so that practically any desired lifetime could be really available for either pesticide residues on plant foliage or pesticide aerosol particles in the air. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
