Abstract:
Durian peel biomass has been widely studied as a source of activated charcoal because it
contains cellulose. This study aims to determine the adsorption capacity and adsorption
kinetics of durian peel activated charcoal adsorbent in adsorbing methylene blue. Durian
peel charcoal was synthesized through a carbonization process with a kiln drum followed
by physical activation using microwave with variations in irradiation time, namely 8
(A8KD), 10 (A10KD) and 12 (A12KD) minutes. The adsorbent with the highest
adsorption capacity in adsorbing methylene blue was sample A8KD at 75 minutes contact
time of 32.05 mg g-1. Based on the adsorption of methylene blue by durian peel activated
charcoal, the suitable adsorption kinetics model based on the regression value (R2) close
to 1 for all samples is pseudo second-order kinetics. The adsorption constant (k2) of
methylene blue on activated charcoal A12KD is the fastest among other activated
charcoal with k2: 0.0105 g mg-1 min-1 and R2: 0.951.
