Herawati, Riri ElijaMuhdarinaLinggawati, Amilia2016-05-022016-05-022016-05-02wahyu sari yenihttp://repository.unri.ac.id/xmlui/handle/123456789/8319The 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.enbiocharcoalTerminalia catappa leaves wastePb(II) cationadsorption kineticsstudent Paper Post Degree