Experimental Design and Optimization of Decolourization of Reactive Black-5 Dye Using Cloud Point Extraction

Table 3

Validity of dye extraction by ANOVA.

Source	Sum of squares	DF	Mean squares	Fcal Value	value Prob> F	Remark
Reactive Black-5 (E)—R^2 = 0.9922
Regression	6786.40	9	754.04	140.72	< 0.0001	Significant model
Residuals	53.58	10	5.36
Lack of fit	53.58	5	10.72
Pure error	0.000	5	0.000
Total	6839.98	19
Phase volume ratio ()—R^2  = 0.9979
Regression	1558.72	6	259.79	1014.07	< 0.0001	Significant model
Residuals	3.33	13	0.26
Lack of fit	3.33	8	0.42
Pure error	0.0000003	5	0.00000006
Total	1562.05	19
RB-5 Concentration in dilute phase (Xs,d)—R^2  = 0.9880
Regression	9.35	9	1.04	91.85	<0.0001	Significant model
Residuals	0.11	10	0.011
Lack of fit	0.11	5	0.023
Pure error	0.000	5	0.000
Total	9.47	19
RB-5 Concentration in surfactant rich phase (Xs,r)—R^2  = 0.9880
Regression	7.87	9	0.87	77.33	< 0.0001	Significant model
Residuals	0.11	10	0.011
Lack of fit	0.11	5	0.023
Pure error	0.000	5	0.000
Total	7.99	19