A New Photocatalytic System Using Steel Mesh and Cold Cathode Fluorescent Light for the Decolorization of Azo Dye Orange G

Table 3

The first-order reaction rate constant k (10² min⁻¹).

(a) Effect of coating temperature		(b) Effect of TiO2 load dosage		(c) Effect of initial concentration		(d) Effect of initial pH		(e) Duration test
Temperature, ^°C	k	Load dosage, g m^−2	k	Concentration, mg L^−1	k	pH	k	Cycle	k
100	2.36	12	1.10	12.5	12.54	2	13.28	1	3.46
150	2.62	20	1.41	18.8	9.67	3	16.60	2	2.41
200	2.52	40	2.41	25	7.71	4	2.64	3	2.14
250	2.27	60	3.23	50	2.83	5.3	2.69	4	2.06
300	2.23	67	2.80	75	2.0	9	2.67	5	1.62
						11	1.53	6	1.80
								7	1.71
								8	1.73
								9	1.66
								10	1.55

Time for (a) and (b) at 60 min; (c) at 20 min.
Time for (d) at 20 min; (e) at 30 min.