Statistical Optimization of Operational Parameters for Enhanced Naphthalene Degradation by TiO_𝟐/Fe_𝟑O_𝟒-SiO_𝟐 Photocatalyst

Table 4

Confirm analyses for the model on naphthalene removal.

Codes	Factors (coded value)			Degradation rate 𝑦 (%)		Standard error (%)
	Irradiation time (min)	pH value	Catalyst loading (g/L)	Actual value	Predicted value
1	90	1.5	0.80	71.9	74.6	3.63
2	100	2	0.90	92.8	95.5	2.79
3	120	2.5	0.80	55.7	54.8	2.26
4	97.1	2.1	0.962	95.9	97.4	1.55
5	97.1	2.1	0.962	96.3	97.4	1.07
6	97.1	2.1	0.962	97.0	97.4	0.37