Treatment of Sulfonated Azo Dye Reactive Red 198 by UV/H₂O₂

Table 3

Effect of the irradiation time and temperature in some physical-chemical parameters. Experimental conditions: UV/1% H₂O₂ and initial pH of 10.

Temperature (°C)	Time (min)	pH	Conductivity (S/cm)	H2O2 residual (%)
25	0	10.00 ± 0.02	811.00 ± 2.81	1.00 ± 0.02
	60	9.96 ± 0.14	1591.00 ± 13.21	0.93 ± 0.05
	120	7.99 ± 0.10	1630.00 ± 8.36	0.88 ± 0.03
	180	6.66 ± 0.15	1563.50 ± 7.05	0.77 ± 0.03
	240	6.59 ± 0.09	1620.50 ± 6.87	0.31 ± 0.04
45	0	10.00 ± 0.02	811.00 ± 2.80	1.00 ± 0.02
	60	9.74 ± 0.09	1682.50 ± 15.28	0.90 ± 0.06
	120	8.24 ± 0.15	1693.80 ± 16.42	0.78 ± 0.04
	180	7.05 ± 0.17	1727.30 ± 12.23	0.58 ± 0.05
	240	6.70 ± 0.16	1790.70 ± 10.11	0.29 ± 0.06
60	0	10.00 ± 0.01	811.00 ± 2.79	1.00 ± 0.01
	60	9.94 ± 0.11	1695.40 ± 14.35	0.60 ± 0.05
	120	8.17 ± 0.13	1712.20 ± 12.40	0.36 ± 0.04
	180	7.13 ± 0.12	1766.30 ± 17.53	0.29 ± 0.04
	240	6.72 ± 0.15	1802.10 ± 15.41	0.05 ± 0.06
80	0	10.00 ± 0.03	811.00 ± 2.82	1.00 ± 0.02
	60	9.84 ± 0.08	1783.20 ± 15.26	0.29 ± 0.06
	120	9.72 ± 0.13	1799.70 ± 13.44	0.14 ± 0.05
	180	8.61 ± 0.17	1831.50 ± 11.55	0.08 ± 0.04
	240	6.88 ± 0.15	1884.20 ± 14.40	0.04 ± 0.05