Table 4.

Table of ANOVA for the quadratic model for PPMPs removal

Source	Sum of squares	df	Mean square	F- value	p- value
Model	375.42	6	62.57	34.45	< 0.0001
A- PPMPs size	287.04	1	287.04	158.03	< 0.0001
B- pH	35.04	1	35.04	19.29	0.0002
D- PAM dosage	18.37	1	18.37	10.12	0.0042
AB	22.56	1	22.56	12.42	0.0018
B2	6.89	1	6.89	3.79	0.0638
D2	6.89	1	6.89	3.79	0.0638
Residual	41.78	23	1.82
Lack of fit	40.28	18	2.24	7.46	0.0177
Pure error	1.50	5	0.30
Cor. total	417.20	29

SD = 1.35, C.V. = % 21.06, R² = 0.900, R²_adj = 0.8737