RB 19 decolorization achieved for the different concentrations of Fenton's reagent, pH and initial RB 19 concentration.

Run no.	pH	[Fe2+] (mg L−1)	[H2O2] (mM)	[RB 19] (mg L−1)	RB 19 decolorization (%)
1	2	0.25	1.5	75	91.0
2	3	0.25	1.5	75	91.2
3	4	0.25	1.5	75	85.1
4	5	0.25	1.5	75	85.5
5	3	0.05	1.5	75	76.6
6	3	0.15	1.5	75	88.9
7	3	0.35	1.5	75	84.6
8	3	0.25	0.5	75	64.6
9	3	0.25	2.5	75	93.8
10	3	0.25	3.5	75	97.0
11	3	0.25	1.5	25	96.3
12	3	0.25	1.5	50	91.3
13	3	0.25	1.5	100	85.3