Yf. Sun et al., TIO2 MEDIATED PHOTOOXIDATION OF TRICHLOROETHYLENE AND TOLUENE, DISSOLVED IN FLUOROCARBON SOLVENTS, Chemosphere, 31(6), 1995, pp. 3575-3584
Titanium dioxide mediated photodegradation of trichloroethylene (TCE)
and toluene dissolved in a fluorocarbon solvent (Galden(R) HT110) was
demonstrated. The photodegradation of TCE yielded dichloroacetic acid
as a major intermediate. The TCE reaction kinetics and high photoeffic
iency suggest autocatalysis and/or a radical chain reaction mechanism.
Photooxidation of toluene is a first-order reaction. Membrane-assiste
d solvent extraction of TCE from water to the fluorocarbon solvent was
demonstrated, and the combination of photooxidation and extraction fo
rm the basis for a novel two-stage process for the removal and destruc
tion of organic contaminants from water.