Mechanism and Kinetics Study for Photocatalytic Oxidation Degradation: A Case Study for Phenoxyacetic Acid Organic Pollutant

Table 4

Coefficient of regression model and its significance.

Factor	Coefficient estimate	Degree of freedom	Standard error	value	95% confidence interval low	95% confidence interval high	value
Intercept	82.74	1	0.84	—	80.95	84.52	—
	−2.07	1	0.42	24.55	−2.97	−1.18	0.0002
	−10.38	1	0.42	614.58	−11.27	−9.49	<0.0001
	4.30	1	0.42	105.44	3.41	5.19	<0.0001
	6.69	1	0.42	255.43	5.80	7.58	<0.0001
	1.73	1	0.51	11.39	0.64	2.82	0.0042
	0.53	1	0.51	1.05	−0.57	1.62	0.3216
	−0.18	1	0.51	0.12	−1.27	0.91	0.7332
	0.069	1	0.51	0.018	−1.02	1.16	0.8942
	−0.15	1	0.51	0.088	−1.24	0.94	0.7712
	−0.14	1	0.51	0.074	−1.23	0.95	0.7895
	−10.42	1	0.39	707.31	−11.25	−9.58	<0.0001
	−3.56	1	0.39	82.46	−4.39	−2.72	<0.0001
	−6.43	1	0.39	269.23	−7.26	−5.59	<0.0001
	−2.08	1	0.39	28.11	−2.91	−1.24	<0.0001