The present work evaluates the sequestration of Pb(II) from aqueous solution by chemically pre-treated pomegranate (Punica granatum) biomass. The obtained results showed that initial metal ion concentration, kinetics affected the adsorption capacity of the pre-treated biosorbent. Maximum adsorption capacity for Pb(II) was observed at pH 4.5. Increase in biosorbent dose decreased Pb(II) uptake capacity. Metal uptake capacity of Pb(II) increased with increase in initial metal concentration. Metal uptake capacity decreased with time. Phosphoric acid pretreatment increased Pb(II) uptake capacity more than other acids. Equilibrium data was best represented by Langmuir adsorption isotherm and pseudo second order kinetic model.