Equilibrium and kinetics studies of heavy metal ions biosorption on green algae waste biomass

► The biosorption of Pb(II), Cd(II), Co(II) on green algae waste was investigated. ► The green algae waste was obtained from marine green algae after extraction of oil. ► Langmuir model provide best correlation of experimental data. ► The pseudo-second order model best describe the biosorption kinetics. ► The obtained results recommend this material as potentially low-cost biosorbent.