Table 1. Variance analysis characteristics of activated carbon derived from the shoot waste of fast-growing teak (FGT)

Source	Df	Yield	Proximate properties				Absorption capacity
			MC	VMC	AC	FCC	ACB	ACM	ACI
Activation temp. (A)	2	**	**	**	**	**	**	**	**
Heating period (B)	2	*	**	**	**	**	**	**	**
Interaction (A × B)	4	NS	**	**	**	**	**	**	**
Error	36	-	-	-	-	-	-	-	-
Total	44	-	-	-	-	-	-	-	-

Non-significant;
Significant (p < 0.05);
Significant (p < 0.01).
Df: degree of freedom, MC: moisture content, VMC: volatile matter content, AC: ash content, FCC: fixed carbon content, ACB: adsorption capacity of benzene, ACM: adsorption capacity of methylene blue, ACI: adsorption capacity of iodine.