关键词: reaction;ozone;pollutant;trichloroethylene;benzene

Abstract: The kinetics of ozonation reactions of trichloroethylene (TCE) and benzene in gas and
liquid phases at 101.3 kPa and 298 K was investigated in this paper. The ozonation of TCE
is first order with respect to the ozone con- centration and one and half order to TCE in
the gas phase with the average rate constant 57.30 (mol. L- 1)-1.5·s- 1, and the TCE
ozonation in aqueous medium is first order with respect to both ozone and trichloroethylene
with the average rate constant 6.30 (mol·L-1)-1.s-1. The ozonation of benzene in the gas
phase is first order in ozone but independent of the benzene concentration with the average
reaction rate constant 0.0011 s-1. The overall kinetics of reaction between ozone and
benzene in aqueous solution is found to be first order with one-half order in both ozone
and bezene, with the average reaction rate constant 2.67 s- 1. It is found that the
ozonation rate of pallutants is much quicker than that of self-decomposition of ozone in
both gas and aqueous phase.

Key words: reaction, ozone, pollutant, trichloroethylene, benzene