Photochemistry water decomposition

Hong and Wang also examined the effect of the oxidizers, H2O2, S208-2, and 104 , on the photochemistry of 2-chlorobiphenyl in Ti()2/water slurries [99]. The addition of the oxidizer to Ti02 resulted in a faster rate of decomposition than Ti02 alone, but a slower rate than the oxidizer alone, i.e. rate (oxidizer) > rate (oxidizer + Ti()2) > rate (Ti()2). This can be explained by the fact that photodegradation occurs both in solution (by oxidizer) and on... 

Gromboni, C.F., Kamogawa, M.Y., Ferreira, A.G., N6brega, J.A., and Nogueira, A.R.A. 2007. Microwave-assisted photo-Fenton decomposition of chlorfenvinphos and cypermethrin in residual water. Journal of Photochemistry and Photobiology A Chemistry, 185 32-37. 

K. Sayama, H. Arakawa, Effect of Na2C03 addition on photocatalytic decomposition of liquid water over various semiconductors catalysis . Journal of Photochemistry and Photobiology A Chemistry, 77, 243-247, (1994). 

As In many areas of environmental science, one of the most difficult aspects of environmental photochemistry Is extrapolating laboratory based experiments to the natural environment. One tool that Is becoming used more frequently Is that of mathematical models to predict the distribution of photoproducts In the environment (12). Modeling aquatic photoprocesses Is complex, for In order to describe In detail the observed products. It Is necessary to understand quantum yields throughout the solar spectrum, formation rates. In many cases decomposition rates (the photoproducts are rarely conservative), absorbance characteristics of the aquatic system, and physical mixing of the water masses. 

Otsuji, Y, Wake S., and Imoto, E., Photochemistry of heterocyclic compounds. 11. Xhe photochemical decomposition of water catalyzed by alloxan monohydrate and its derivatives. Tetrahedron, 26, 4139, 1970. 

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