Original Articles: 2015 Vol: 7 Issue: 8
Biosorption of lead(II) and copper(II) from aqueous solution by Nypa frutican husk
Abstract
Absorption of Pb(II) and Cu(II) ions by Nypa fruticans husk biomass using Batch method has been studied. It was found for the absorption of both metal ions, where is the optimum pH and contact time respectively as 4 and 5 minutes for Pb(II) ions and as 5 and 30 minutes for Cu(II) ions. Stirring speed to a both metal ions biosorption process is fixed at 150 rpm. The optimum absorption capacity for Pb(II) and Cu(II) ions were obtained respectively as 20.825 mg/g and 7.572 mg/g. In fact the adsorption capacity decreases with increasing biosorbent mass. The equilibrium adsorption isotherm models of Langmuir and Freundlich were executed based on the experimental datas. The equilibrium adsorption isotherm model of Langmuir give a better result than the Freundlich due to its high correlation in R2 coefficient. Nypa fruticans husk biomass was characterized by SEM and FTIR methods. Where is the FTIR spectra analysis explains that the carboxyl and hydroxyl amine groups play an important role in the absorption of the metal ions. Biosorption in binary solution does not affect the absorption capacity of the target ion (optimum conditions used in the binary solution) by Nypa fruticans husk.