Table 1.

Chemical reactions associated with UV-activated hydrogen peroxide (H₂O₂) and UV-activated persulfate (S₂O₈ ²⁻) oxidative treatment systems.

Hydrogen peroxide related reactions
UV activation: ${\text{H}}_2{\text{O}}_2\to 2•\text{OH}$		R1
•$\text{OH}+\text{RhB}\to \text{products}$	k2 = 2.5 × 1010 M−1 s−1 [5]	R2
•$\text{OH}+{{\text{∑}}_{\text{i}=1}}^{\text{n}}\left[{\text{S}}_{\text{i}}\right]\to \text{products}$		R3
•$\text{OH}+{\text{H}}_2{\text{O}}_2\to {\text{HO}}_2{•}^{-}+{\text{H}}_2\text{O}$	k4 = 2.7 × 107 M−1 s−1 [5]	R4
•OH + ≡Si → products		R5
${\text{H}}_2{\text{O}}_2\to {\text{H}}_2\text{O}+½{\text{O}}_2$		R6
Persulfate related reactions
UV activation: S2O8 2− → 2SO4 •−		R7
SO4 •− + RhB → products	k8 = 3.02 × 10 8 M −1 s −1 [15]	R8
${{\text{SO}}_4}^{•-}+{{\text{∑}}_{\text{i}=1}}^{\text{n}}\left[{\text{S}}_{\text{i}}\right]\to \text{products}$		R9
SO4 •− + S2O8 2− → SO4 2− + S2O8 •−	k10 = 6.1 × 10 5 M −1 s −1 [6]	R10
SO4 •− + OH − → SO4 2− + HO•	k11 = 7.0 × 10 7 M −1 s −1 [6]	R11
SO4 •− + H2O → SO4 2− + HO• + H +	k12 = 6.6 × 10 2 s −1	R12
SO4 •− + ≡Si → products		R13
S2O8 2− → 2 SO4 2−		R14