Impact of Hydrogen Peroxide on the UVC Photolysis of Diclofenac and Toxicity of the Phototransformation Products

Table 1

The literature data used for kinetic calculations and determined values of reaction rate constants.

Constant	Value	References
φH2O2	0.5	[17]
εH2O2 at 254 nm, M^−1 cm^−1	18.6	[18]
εDCF at 254 nm and pH 4.5, M^−1 cm^−1	5952 ± 41	Determined in this work
E0, einstein dm^−3 s^−1	7.33 × 10^−6	[19]
pKa for H2O2	11.3	[20]
pKa for DCF	3.99	[21]
k2, M^−1 s^−1	2.7 × 10^7	[22]
k3, M^−1 s^−1	7.5 × 10^9	[22]
kz, s^−1	0.00348 ± 0.000206	Determined in this work
k·OH, M^−1 s^−1	(1.36 ± 0.080) × 10^10	Determined in this work