Table 4: Principal elements identified on the activated carbons by SEM/EDX analysis.

Elements CTWKAC25KAC50KAC100KCAC25KCAC50KCAC100HAC25HAC50HAC100

C77.9278.9674.8780.2878.5879.3078.6878.7779.2878.79
O20.5817.2620.8415.2617.2815.2617.3119.6518.7218.61
K1.503.784.294.464.145.444.010.440.891.53
Cl1.141.111.07