Removal of Pertechnetate (&sup&99&/sup&TcO&sub&4&/sub&&sup style="margin-left:-6px;"&-&/sup&) from Liquid Waste by Magnesium Ferrite (MgFe&sub&2&/sub&O&sub&4&/sub&) Nanoparticles Synthesized Using Sol-Gel Auto Combustion Method

摘要

Low-cost adsorbents, Magnesium ferrite (MgFe_( 2 ) O _( 4 ) ) nanoparticles were synthesized using three different types of fuel such as Urea, Oxalic acid, and Citric acid via sol-gel auto-combustion method. The prepared products were characterized by means of powder X-Ray Diffraction (XRD), Fourier Transform Infrared spectroscopy (FT-IR) and Field Emission Scanning Electron Microscope (FE-SEM). The influence of the fuel used on the morphology and the crystallite size of MgFe _( 2 ) O _( 4 ) Nano products w ere studied. The results showed that Citric acid fuel produced pure MgFe _( 2 ) O _( 4 ) with the smallest crystallite size average cluster = 13.53 nm. The synthesized sample was used for the removal of ~(99)TcO_(4) -) anions from low level liquid waste under studied conditions. The different parameters affecting on the adsorption process using the batch method were studied. The results revealed that MgFe _( 2 ) O _( 4 ) nanostructure has high removal ability of ~(99)TcO_(4) -) from aqueous solutions (98.84%). The adsorption data are in good agreement with Freundlich and Pseudo second order isotherm models. The adsorption process was a chemisorption reaction additionally, the results of the thermodynamic parameters indicated that the adsorption of ~(99)TcO_(4) -) on nanostructures was an exothermic and spontaneous process.