Table 5.

Response Surface (ANOVA) for Cd²⁺ ions adsorption using PKC.

Source	Sum of squares	Df	Mean square	F/value	P –value Prob > F	Comment
Model	3635.64	9	403.96	185.61	<0.0001	S.D = 1.48
A -temp	337.21	1	337.21	154.94	<0.0001	Mean = 65.23
B- Dosage	735.82	1	735.82	338.10	<0.0001	R2 = 0.9940
C- Time	1198.37	1	1198.37	550.63	<0.0001	R2(adj)=0.9826
AB	458.74	1	458.74	210.78	<0.0001	AP = 57.602
AC	60.83	1	60.83	27.95	0.0004	C.V = 2.26
BC	261.52	1	261.52	120.78	<0.0001
A2	12.50	1	12.50	5.74	0.0375
B2	34.21	1	34.21	15.72	0.0027
C2	123.88	1	123.88	56.92	<0.0001
Residual	21.76	10	2.18
Lack of fit	9.38	5	1.88	0.76	0.6158
Pure Error	12.38	5	2.48
Cor. Total	3657.90	19