A reaction kinetics model of water sonolysis in the presence of a spin-trap.
The time development of the concentration of a spin-trapped OH radical was studied by electron spin resonance at various sound intensities and various 5,5-dimethyl-1-pyrroline N-oxide (DMPO) concentrations in water sonolysis. The lifetime of the spin-trapped OH radical was also studied, and factors governing sonolysis are discussed. We found that the production of spin-trapped OH radical increases with increasing ultrasound intensity. The lifetime of a spin-trapped OH radical decreases linearly with increase in sonication time. This result suggests that an unknown scavenger is produced by ultrasound. Based on the above results, we suggested a model of the reaction kinetics and estimated the production rate of OH radical from this model.
Yanagida
H
H
Department of Materials Science and Engineering, Yamagata University, Yonezawa 992, Japan. yanagi@ckpss.yz.yamagata-u.ac.jp
Masubuchi
Y
Y
Minagawa
K
K
Ogata
T
T
Takimoto
J
J
Koyama
K
K