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Preparation and characterization of aluminum silicotitanate: ion exchange behavior for some lanthanides and iron
Author(s) -
Attallah Mohamed F,
Elgazzar Amira H,
Borai Emad H,
ElTabl Abdou S
Publication year - 2016
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.4810
Subject(s) - lanthanide , ion exchange , aqueous solution , thermogravimetry , adsorption , fourier transform infrared spectroscopy , chemistry , inorganic chemistry , differential thermal analysis , aluminium , nuclear chemistry , materials science , ion , chemical engineering , metallurgy , organic chemistry , physics , optics , diffraction , engineering
BACKGROUND The removal and recovery of rare earth elements have gained great attention not only because of their industrial importance, but also from the viewpoint of environmental waste disposal. Ion exchange technology is currently the best way to remove and recover metal ions from aqueous solutions. Therefore, the aim of this work is to synthesize a thermally stable inorganic ion exchange material with high adsorption efficiency for lanthanides. RESULTS A number of aluminum silicotitanates ( AST 1–31 ) have been synthesized under different conditions of preparation including molar ratio, concentration, ageing time and drying temperature. These materials were characterized structurally using Fourier transform infrared spectroscopy ( FTIR ), X‐ray fluorescence ( XRF ), thermogravimetry ( TG ) and differential thermal ( DT ) analysis, scanning electron microscopy ( SEM ) and BET ‐surface area. The material was found to have the formula [ Al 6 Si 4 TiO 19 ] 8H 2 O . Their properties as potential inorganic ion exchange materials have been examined for the removal of La( III ), Eu( III ), Fe( III ) from aqueous solution. CONCLUSION The adsorption of rare earth elements and iron was found to be 99 and 79%, respectively. Thus it is concluded that the AST inorganic exchanger is more efficient for recovery of rare earth elements than iron. © 2015 Society of Chemical Industry