S. No

Type of oxidation process

Treated dye

Result

Ref

1

UV/H₂O₂

Azo dye Reactive Green 19 (RG19)

Complete decolorization within 20 min. Around 63% of Total organic carbon (TOC) was eliminated in 90 min.

(Zuorro & Lavecchia, 2014)

2

Combinations of TiO₂/UV/H₂O₂

Azo dye Amaranth (AM)

The decolorization efficacies were 17%, 26%, 38% and 64% for UV, UV þ H₂O₂, and UV þ TiO₂.

(Gupta et al., 2012)

3

Hydrogen peroxide in subcritical water

Reactive Red 120

The experimental temperature is linked to the rate of H₂O₂ change to hydroxyl radical radicals (0.5% w/v). Hydrogen peroxide was ideal for degrading RR120 at all dyes concentrations and temperatures.

(Daskalaki et al., 2011)

4

Hydrodynamic cavitation with the existence of (H₂O₂, CCl₄) and Fenton’s reagent.

Rhodamine B

Decolorization of Rhodamine was at 99.9%, utilizing a combination of cavitation and H₂O₂ and a combination of cavitation with Fenton chemistry.

(Mishra & Gogate, 2010)