Hydrogen Peroxide

In the photoactivation process of H2O2 with ultraviolet radiation, the generation of the hydroxyl radical is as follows:

H₂O₂ + u → 2 OH^-

H2O2 + UV Radiation

Contaminant + [ H2O2 + u (UV 254 nm) ] → Decontamination

Contaminant + [ H2O2 + Fe (aq) ] → Decontamination + Fe(OH)3 (s)

In the Fenton process, the generation of hydroxyl and regeneration of Fe2+ occurs as follows:

Fe²⁺ + H₂O₂ → Fe³⁺ + OH^- + OH^-

Fe³⁺ + H₂O₂ → Fe²⁺ + H⁺ + OOH^-

Fenton Process

Contaminant + [ H2O2 + Fe (aq) ] → Decontamination + Fe(OH)3 (s)

In the so called Peroxone system, the generation of hydroxyl is as follows:

H₂O₂ + 2 O₃ → 3 O2 + OOH^-

System flowchart: H2O2 + O3

Contaminant + [ H2O2 + nO3 ] → Decontamination