Leaves of Moringa oleifera in nano scale was prepared and characterized by FTIR, SEM, TEM, XRD and EDS techniques. In addition to, study of the effect of nano sized Moringa oleifera on adsorption of Cd2+ ions from aqueous solution was checked. The influence of pH, temperature, adsorbent dosage, contact time, metal ion concentration and chemical treatment of biomass were investigated. The maximum adsorption capacity(qm) of Cd2+ ions biosorption by Moringa oleiferawas 40.53 mg g−1. The removal efficiency was 93.74%. The amount of Cd2+ ions adsorbed increases with increasing in adsorbent dosage and metal ion concentration. Biosorption of Cd2+ ions slightly increases as increasing the temperature. IR spectra showed that the main functional groups are responsible for Cd2+ ions binding in the biosorption process. Thermodynamic studies confirmed that the biosorption process is endothermic. The obtained positive value of ΔG° indicated that the ion-exchange mechanism applies in the biosorption.The sorption process was fitted to pseudo second order kinetics. The Freundlich isotherm has a good fit with the experimental data compared to Langmuir isotherm. The results obtained from the current research suggested that Moringa olieferais available agricultural, low cost, environment friendly biosorbent for the removal of toxic
heavy metals from aqueous environment.