Original Articles: 2015 Vol: 7 Issue: 7
Biosorption characteristics of Cd(II) ions using herbal plant of mahkota dewa (Phaleria macrocarpa)
The efficacy of herbal plantMahkota Dewa (Phaleria macrocarpa) fruit namely seed and fleshas an alternative low cost biosorbents for the removal of Cd(II) ions fromaqueous solution was investigated. Batch biosorption studies were carried out to evaluate the effects of solution of pH, initial Cd(II) ion concentration, contact time andbiosorbent mass on biosorption capacity. The optimum biosorption condition was found at pH 6,0 for both seed and flesh. Initial concentration at 3,000 mg/L, contact time 30 min for flesh and 45 min for seed and 0.1 g biosorbent dose for both seed and flesh of mahkota dewa herbal plant. The biosorption data were fitted to the Langmuir isotherm, The maximum biosorption capacities (Q) estimated from Langmuir isotherm model for Cd(II) ion were 21.4592 mg/g and 24.7629 mg/g for seed and flesh of mahkota dewa, respectively. Cd(II) ion concentrations were measured by using Atomic Absorption Spectroscopy detection, while the characterisation studies were performed using Scanning Electron Microscope (SEM) and Fourier Transform Infra Red pectroscopy (FT-IR). Interaction of Cd(II) ion with the funtional groups of seed and flesh of mahkota dewaled to the formation of discrete aggregates on the biosorbents surface. Indicated the Cd(II) ion bond to the active sites of the biosorbent of mahkota dewa through either electrostatics attraction.