Characterization of ZrO2 Nano Particles Prepared by Glycothermal Method and their Efficiency as Adsorbent of As(III) and As(V) from Waste Water

摘要

In this studied ZrO2 nano particles are prepared by glycothermal method. Characterization of the prepared nano particle was done using XRD, TEM and SEM. According to the obtained results, ZrO2 nano particles prepared by glycothermal method are mainly t-ZrO2 phase with tetragonal shape with an average size in the range of 30-50 nm. The formation of t-ZrO2 as the main phase of zirconium nano particles could be related to the presence of sodium hydroxide in the generation step. The removal efficiency of ZrO2 nano particles for adsorbing As(III) and As(V) from waste water is studied. The efficiency of removal is significantly increased with increasing the dose of zirconia nano particles till 0.5 g/L. This related to increasing in the active site which are available for the removal of arsenic species by increasing the dose of the nano particles. For both As(III) and As(V), the removal efficiency increased by decreasing pH value of the solution and increasing the contact time.