43.
The photolysis of ozone and formation of hydrogen peroxide were investigated in solution of pH 2–7, in a 200 cm
3 photoreactor in the incident photon flow range 9.6 x 10
?8 - 4.2 x 10
?7 einstein s
?1. The quantum yield of the primary photochemical reactions was measured in a direct way by suppressing the secondary radical reactions. The determined quantum yields of the photo-decompositions of ozone and hydrogen peroxide were 0.42 ± 0.042 ± 0.04 and 0.49 ± 0.04, respectively.
A correct mathematical treatment is given for calculation of the light absorption of the individual components of a multi-absorbent reaction mixture.
On the basis of the literature data and die present results, a probable chemical and reaction kinetic model was proposed to characterize the investigated reaction systems. Reaction kinetic simulations demonstrated that the model predicts a good fit to the measured data with the preferred literature rate constants, except that for the HO3 radical decomposition reaction. A reasonable reduction of this rate coefficient value is in accordance with the latest published results. 相似文献