TITLE:
Removal of Pertechnetate (99TcO4-) from Liquid Waste by Magnesium Ferrite (MgFe2O4) Nanoparticles Synthesized Using Sol-Gel Auto Combustion Method
AUTHORS:
W. M. Abdellah, A. Ezzat, I. Samir
KEYWORDS:
Magnesium Ferrite, Nanoparticles, Sol-Gel, Auto Combustion, Adsorption, Pertechnetate, Low Level Radioactive Waste
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.9 No.2,
February
26,
2019
ABSTRACT: Low-cost
adsorbents, Magnesium ferrite (MgFe2O4) 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 MgFe2O4 Nano products were studied. The results showed that Citric acid fuel produced pure MgFe2O4 with the smallest crystallite size average cluster = 13.53 nm. The synthesized
sample was used for the removal of 99TcO4- 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 MgFe2O4 nanostructure has high
removal ability of 99TcO4- 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 99TcO4- on
nanostructures was an exothermic and spontaneous process.