Silver(I) Catalyzed Photochemical Oxidation of Methylene Blue and Safranine-O by Peroxydisulphate: A Green Chemical Approach

Table 2

Effect of pH.

pH	Methylene blue	Safranine-O
	/sec^−1	/sec^−1
3.0	0.85	2.10
3.5	1.04	2.34
4.0	1.32	2.53
4.5	1.71	3.07
5.0	2.11	2.41
5.5	1.86	2.36
6.0	1.70	2.30

For methylene blue, [Methylene Blue] =  M; [] =  mol dm⁻³; [AgNO₃] =  mol dm⁻³; light intensity = 60.0 mW cm⁻². For safranine-O, [Safranine-O] =  mol dm⁻³; [] =  M; [AgNO₃] =  mol dm⁻³; light intensity = 60.0 mW cm⁻².