Phototransformation of Alphacypermethrin as Thin Film on Glass and Soil Surface∗

∗A part of Ph.D. thesis of the first author in the Department of Chemistry submitted to the Bundelkhand University, Jhansi, U.P., India.

Photodegradation of alphacypermethrin ((RS)-α cyano-3-phenoxy benzyl (1RS) cis-3-(2,2,dichlorovinyl)-2,2-dimethyl cyclopropane carboxylate) was studied as a thin film on glass surface and on black and red soil surfaces. A number of photoproducts from glass surfaces have been isolated, characterized and identified by gas chromatography-mass spectroscopy (GC-MS). However, only two of them viz. 3-phenoxy benzyl alcohol and [2,2-dichlorovinyl-3(2,2,dimethyl) cyclopropane carboxylate] could be identified from both the soil. Rate of photodegradation on glass and soil surface under UV and sunlight followed first order kinetics with significant correlation coefficients. The rate of photodegradation was greater on black than on red soil.

∗A part of Ph.D. thesis of the first author in the Department of Chemistry submitted to the Bundelkhand University, Jhansi, U.P., India.

KeyWords:

• Photodegradation
• Black soil
• Red soil
• UV
• Sunlight
• Alphacypermethrin

The authors are grateful to the Head, PAR Division and the Director, Indian Grassland and Fodder Research Institute, Jhansi, Uttar Pradesh, India for providing necessary facilities to carry out the experiment, constant encouragement and valuable suggestions.

Notes

∗A part of Ph.D. thesis of the first author in the Department of Chemistry submitted to the Bundelkhand University, Jhansi, U.P., India.