Mossbauer Effect Study of Seawater-Neutralized Red Mud and its Adsorption Properties

The 57Fe Mossbauer spectra of seawater-neutralized red mud from the Gladstone, Queensland, alumina refinery was found to be due almost entirely to SPM and magnetically split hematite, for which the Morin transition had been suppressed below 5 K. Adsorption of metal ions from solutions with varying c...

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Bibliographic Details
Main Authors: Coyle, C M, Cashion, J D
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:The 57Fe Mossbauer spectra of seawater-neutralized red mud from the Gladstone, Queensland, alumina refinery was found to be due almost entirely to SPM and magnetically split hematite, for which the Morin transition had been suppressed below 5 K. Adsorption of metal ions from solutions with varying concentrations of Cd, Cr, Cu, Mn, Pb and Zn either enhanced or reduced the magnetic relaxation frequency in small concentrations, depending on the ion, but always reduced the relaxation frequency at large concentrations. Precipitation of hydrocerussite, Pb3(OH)2(CO3)2 was identified from the XRD spectrum.
ISSN:0094-243X
DOI:10.1063/1.1923648