Biosorption Study of Methylene Blue (MB) and Brilliant Red Remazol (BRR) by Coconut Dregs

Table 1

Anova (analysis of variance) for 2-level factorial of MB adsorption capacity.

Source	Sum of squares	Df	Mean Square	F Value	p-value Prob > F
Model	288.74	6	48.120	2191.82	<0.0001	Significant
A- contact time	15.76	1	15.760	717.79	<0.0001	Significant
B-adsorbent dosage	231.30	1	231.300	10534.57	<0.0001	Significant
C- initial Concentration	25.49	1	25.490	1160.99	<0.0001	Significant
D-pH	0.66	1	0.660	29.86	<0.0001	Significant
AB	7.51	1	7.510	341.90	<0.0001	Significant
BC	8.03	1	8.030	365.83	<0.0001	Significant
Curvature	5.51	1	5.510	251.00	<0.0001	Significant
Residual	0.59	27	0.022	2.26	0.0673	Not significant
Lack of fit	0.31	9	0.035
Pure error	0.28	18	0.015
Cor total	294.85	34
Std. Dev.	0.1482		R-squared		0.9980
Mean	3.8483		Adj R-Squared		0.9975
C.V. %	3.8504		Pred R-Squared		0.9966
PRESS	0.9714		Adeq precision		124.9529