Comparison of the degradation of RhB in different systems.

Entry	Experimental conditions	k (min)−1	η RhB (%)
1	K–Fe (dark)	0.0034	5.3
2	K–Fe (light)	0.0053	7.7
3	K–Fe/oxalic acid (dark)	0.0459	37.9
4	K–Fe/oxalic acid (light)	0.1125	67.1
5	K–Fe/H2O2 (dark)	0.0114	12.9
6	K–Fe/H2O2 (light)	0.0162	16.1
7	K/H2O2/oxalic acid (light)	0.1101	68.7
8	K–Fe/H2O2/oxalic acid (dark)	0.0540	41.8
9	Fe2+/H2O2 (light)	0.2189	74.0
10	K–Fe/H2O2/oxalic acid (light)	0.3155	98.8