Abstract:
The adsorption ability of biocharcoal of Terminalia catappa leaves waste (BLDK-30;
BLDK-60 and BLDK-120) has been studied using cation of Pb(II) in aqueous solution.
The adsorption experiments were observed at each contact time i.e 5, 15, 30, 35, 40 and
45 minutes. All of the experiments were done at a temperature of 30°C and initial
concentration of 10 ppm at pH 3. The amount of P (II) adsorbed by the adsorbents was
measured by Atomic Absorption Spectrophotometer (AAS). All data were then applied
into kinetic models of the pseudo-first order and pseudo-second order to determine the
adsorption behavior. The result showed that the amount of Pb(II) adsorbed by
adsorbents BLDK-30, BLDK-60 dan BLDK-120 at 30 minutes contact time were
0.9965; 0.9919 and 0.9892 mg g-1, respectively. All of the biocharcoal of Terminalia
catappa leaves waste which adsorbed Pb(II) cations according to pseudo second-order
kinetics with k values (g mg-1 min-1) of each adsorbent were 10.246, 43.668 and 16.778,
Respectively. Fulfillment of the pseudo second-order models has indicated that the
process occurred was chemical adsorption.
