Comparison of Surface and Structural Properties of Carbonaceous Materials Prepared by Chemical Activation of Tomato Paste Waste: The Effects of Activator Type and Impregnation Ratio

Table 4

Principal elements identified on the activated carbons by SEM/EDX analysis.

Elements	CTW	KAC25	KAC50	KAC100	KCAC25	KCAC50	KCAC100	HAC25	HAC50	HAC100
C	77.92	78.96	74.87	80.28	78.58	79.30	78.68	78.77	79.28	78.79
O	20.58	17.26	20.84	15.26	17.28	15.26	17.31	19.65	18.72	18.61
K	1.50	3.78	4.29	4.46	4.14	5.44	4.01	0.44	0.89	1.53
Cl	—	—	—	—	—	—	—	1.14	1.11	1.07