The Co2+ Adsorption Properties of Al2O3, Fe2O3, Fe3O4, TiO2, and MnO2 Evaluated by Modeling with the Frumkin Isotherm

Journal of Colloid and Interface Science
H TamuraR Furuichi

Abstract

Adsorption of Co(II) ions on metal oxides is related to radioactive 60Co(II) (de)contamination of nuclear power plants, Co(II) ion retention in soils as a plant nutrient, concentration of Co(II) in deep-sea manganese nodules, and other applications. Here, the amount of adsorbed Co(II) on metal oxides was measured as a function of the pH and concentration of Co(II) ions, and the adsorption properties of metal oxides were evaluated with a model that considers simultaneous (1:1) and (1:2) exchange reactions between Co2+ aqua ions and surface hydroxyl protons obeying the Frumkin isotherm. The possibility of participation of mono- and polynuclear Co(II) hydroxo complexes in the adsorption was examined, and it was suggested that these species play no role under the conditions here. From the model parameters, it was found that the Co2+ adsorption ability of metal oxides increases in the order Al2O3 < Fe2O3 < TiO2 < Fe3O4 < MnO2, showing a good correlation to the electronegativity Xi of the lattice metal ions of the oxides. The Co2+ adsorption was divided into two processes: (1) deprotonation of surface hydroxyl sites and (2) bonding of Co2+ to the deprotonated sites with a negative charge. With increasing Xi, process 1 increases possi...Continue Reading

References

Mar 1, 1997·Journal of Colloid and Interface Science·S N TowleG A Parks

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Citations

Sep 26, 2013·Journal of Bioscience and Bioengineering·Keisuke IwahoriNaoyuki Miyata
Apr 1, 2008·Journal of Hazardous Materials·Erdal Eren
Sep 24, 2004·Journal of Colloid and Interface Science·Hiroki Tamura
Sep 15, 2015·Journal of Hazardous Materials·Min XingJianlong Wang
Feb 2, 2006·Journal of Colloid and Interface Science·Abdusalam UheidaMamoun Muhammed
Feb 10, 2006·Journal of Colloid and Interface Science·Thipnakarin BoonfuengTrevor A Tyson
Sep 10, 2005·Journal of Colloid and Interface Science·Z ZhangD J Wesolowski
Dec 10, 1998·Journal of Colloid and Interface Science·I Larson, R J Pugh
Jan 8, 1999·Journal of Colloid and Interface Science·H TamuraR Furuichi
Jan 27, 1998·Journal of Colloid and Interface Science·H Tamura, R Furuichi
Apr 27, 2016·Journal of Colloid and Interface Science·Min Xing, Jianlong Wang
Jan 1, 2014·International Scholarly Research Notices·A I M IsmailM S El-Maghraby
Nov 21, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Louise J CriscentiDavid Hart
Nov 17, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·John VakrosAlexis Lycourghiotis
Jul 21, 2006·The Journal of Physical Chemistry. B·Theodora AtaloglouAlexis Lycourghiotis

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