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An examination of the applicability of hydrotalcite for removing oxalate anions from Bayer process solutions

Brady, James Peter (2011) An examination of the applicability of hydrotalcite for removing oxalate anions from Bayer process solutions. Masters by Research thesis, Queensland University of Technology.

Abstract

Hydrotalcite and thermally activated hydrotalcites were examined for their potential as methods for the removal of oxalate anions from Bayer Process liquors. Hydrotalcite was prepared and characterised by a number of methods, including X-ray diffraction, thermogravimetric analysis, nitrogen adsorption analysis and vibrational spectroscopy. Thermally activated hydrotalcites were prepared by a low temperature method and characterised using X-ray diffraction, nitrogen adsorption analysis and vibrational spectroscopy. Oxalate intercalated hydrotalcite was prepared by two methods and analysed with X-ray diffraction and for the first time thermogravimetric analysis, Raman spectroscopy and infrared emission spectroscopy. The adsorption of oxalate anions by hydrotalcite and thermally activated hydrotalcite was tested in a range of solutions using both batch and kinetic adsorption models.

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ID Code: 46165
Item Type: QUT Thesis (Masters by Research)
Supervisor: Martens, Wayde& Frost, Ray
Keywords: adsorption, Bayer liquor, Freundlich isotherm, hydrotalcite, kinetics, Langmuir isotherm, oxalate intercalated hydrotalcite, oxalate, thermally activated hydrotalcite
Divisions: Past > Schools > Chemistry
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Institution: Queensland University of Technology
Deposited On: 26 Sep 2011 15:42
Last Modified: 26 Sep 2011 15:42

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