Efficient exclusion of uranyl ion from aqueous medium by a novel magnetic bio adsorbent (Phyllanthus emblica bark)

Abstract

The exclusion process of uranyl ion in an aqueous medium is carried out with an adsorption method. The existence of uranyl ion in the environment is a matter of concern due to its toxicity. The biotic factor has been affected badly with the presence of uranyl ion above a permissible limit. In the present study, iron oxide magnetic particles (Fe3O4) were successfully fused with tree bark of Phyllanthus emblica by chemical precipitation, which was characterized by XRD, FTIR, and SEM-EDS study. Moreover, Phyllanthus emblica bark is extremely rich in iron and magnetic adsorbent does not produce any secondary pollutant as compared to other adsorbents. It is a novel as well as green approach towards environment. The amount of the adsorbent (0.3 gm/50 ml) could remove 85.6% of U(VI) in 40 min from a metal ion solution concentration 25 mg/L at room temperature (303 K). The equilibrium adsorption is reported at pH = 7. The adsorption isotherm is defined by Langmuir (r2 = 0.963), while the kinetic interest profile is considered by the kinetics of pseudo second-order (r2 = 0.9988). Estimated thermodynamic parameters are fit for present investigation.