Imazethapyr Aqueous Photolysis, Reaction Quantum Yield, and Hydroxyl Radical Rate Constant
Citations Over TimeTop 18% of 2006 papers
Abstract
The recent introduction of imidazolinone-tolerant rice varieties allow imazethapyr to be used in commercial rice. Little is known about imazethapyr photodegradation in the rice field. Laboratory studies were conducted to determine the direct and indirect photolysis rates for imazethapyr and to evaluate the photolysis of imazethapyr in three rice paddy waters. The reaction quantum yield (phi I) for imazethapyr was determined to be 0.023 +/- 0.002, while the hydroxyl radical rate constant (K(I)*OH) was 2.8 x 10(13) M(-1) h(-1). These results show that imazethapyr is susceptible to both direct and indirect photolysis reactions in water. The results also show that imazethapyr photolysis in paddy water will be affected by turbidity because of its impact on the availability of sunlight to drive direct and indirect photolysis reactions.
Related Papers
- → Photodissociation of H2O2 and CH3OOH at 248 nm and 298 K: Quantum yields for OH, O(3P) and H(2S)(1990)127 cited
- → Characterization of the Reaction Rate Coefficient of DNA with the Hydroxyl Radical(1996)36 cited
- → N2O5 photolysis: Quantum yields for NO3 and O(3P)(1986)26 cited
- → Comment on ‘Photodissociation dynamics of water at Lyman alpha (121.6 nm)’ by Whikun Yi, Jaehong Park and Jungwoo Lee [Chem. Phys. Lett. 439 (2007) 46](2007)3 cited