Functional groups on the surface of the activated carbon were
identified using the Fourier Transform Infrared analysis (FTIR)
where samples of the activated carbon was grounded with KBr
(spectroscopic grade) with a ratio of 1:100 (sample: KBr) in a
mortar before pressed into a 10 mm diameter disks under 6 tonnes
of pressure prior to analysis. The analysis condition used was 16
scans at a resolution of 4 cm1 measured between 400 and
4000 cm1.