Biosorption Of Lead Pb2 From Aqueous Solution On Cordia Dichotoma L Biomass

ABSTRACT A method is described for the Biosorption of Pb2 from aqueous solution as well as natural water samples by using biomass prepared from the seed powder of Cordia dichotoma. Parameter such as pH bio-adsorbent dose contact time and concentration of the metal ion in the solution were investigated. The adsorption equilibrium data were tested by the commonly used two parameter equations such as the Langmuir and Freundlich adsorption isotherms. The results indicated that the data of Pb2adsorption on to biomass of Cordia dichotoma fits to the Freundlich model. The adsorption capacity Qm calculated from the Langmuir adsorption isotherm was 0.02 mg Pb2 g-1 at a pH of 7. Adsorption kinetics data were analysed using the pseudo first order and pseudo second order equations. The graphs showed that the experimental data suited well to pseudo second order model. XRD spectrum of the Cordia dichotoma powder showed the presence of the fine crystals which help for the best adsorption of Pb2 ions. The FT-IR spectral analysis revealed the presence of hydroxyl and carbonyl functional groups which are chelated in the bioadsorbent. It is very much effective in removing Pb2 ion from water in presence of common metal ions like Na K Ca2 and Mg2 etc.