Optimization of Biosorptive Removal of Dye from Aqueous System by Cone Shell of Calabrian Pine

Table 4

Results of analysis of variance (ANOVA).

Factor	Degree of freedom	Sum of squares	Mean squares	Fischer ratio	value	Percent contribution
Dye concentration	2	1495.69	747.843	133.09	0.007	51.571
Biosorbent particle size	2	559.83	279.917	49.82	0.020	19.303
Contact time	2	833.50	416.748	74.17	0.013	28.739
Error	2	11.24	5.619			0.388
Total	8	2900.25