Skip to main content
SpringerLink
Log in

Adsorption of Co2+ and Zn2+ on cryptomelane-type hydrous managese dioxide

  • Published:
Journal of Radioanalytical and Nuclear Chemistry Aims and scope Submit manuscript

Abstract

Co2+ and Zn2+ ions are adsorbed on cryptomelane-type MnO2 by exchange with surface protons and with structural ions (probably K+ and/or Mn2+) in the oxide. The latter sites are responsible for the much higher capacity to these cations, compared to Na+. At all pH values, two straight lines expressing the presence of mainly two groups of sites with distinctly different adsorption energies are located in the Langmuir plots for both Co2+ and Zn2+. The apparent capacities of the two groups increase with the increase of pH, indicating the involvement of protons in the adsorption process over the whole concentration range. The higher Co2+ capacity at relatively low pH, compared to the Zn2+ capacity, is probably due to a more exchange with the structural ions. Crytomelane type MnO2 seems to be a quite heterogenous ion adsorbent whose adsorption sites could be approximated to two groups only.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. J. L. Mero, The Mineral Resources of the Sea, Elsevier, Amsterdam, 1965, p. 3112.

    Google Scholar 

  2. R. M. Taylor, R. M. Mckenjie, Aust. J. Soil Sci., 4 (1966) 29.

    Google Scholar 

  3. R. G. Burns, D. W. Fuerstenau, Amer. Mineral, 51 (1966) 895.

    Google Scholar 

  4. E. A. Janne, Adv. Chem. Ser., 73 (1968) 337.

    Google Scholar 

  5. R. M. Taylor, J. Solid Sci., 19 (1968) 77.

    Google Scholar 

  6. C. B. Amphlett, Inorganic Ion Exchangers, Elsevier, Amsterdam, 1964.

    Google Scholar 

  7. O. V. Singh, S. N. Tandon, Intem. J. Appl. Radiation Isotopes 28 (1977) 701.

    Google Scholar 

  8. S. M. Hasany, M. A. Qureshi Interm. J. Appl. Radiation Isotopes, 32 (1981) 747.

    Google Scholar 

  9. S. M. Hasany, M. H. Chaudhary, Intem. J. Appl. Radiation Isotopes, 32 (1981) 899.

    Google Scholar 

  10. J. J. Morgan, W. Stumm, J. Colloid Interface Sci., 19 (1964) 347.

    Google Scholar 

  11. R. M. Mckanjie, Aust. J. Soil Sci., 8 (1970) 97.

    Google Scholar 

  12. C. H. V. D. Weijden, Mar. Chem., 4 (1976) 377.

    Google Scholar 

  13. M. Tsuji M. Abe, Solv. Extr. Ion Exch., 2 (1984) 253.

    Google Scholar 

  14. E. M. Mikhail, E. I. Shabane, H. F. Ghoneimy, N. Z. Misak, 5th Conf. on Nuclear Science and Application, Vol. 2, 1992, p. 974.

  15. P. Loganathan, R. G. Burau, Geochim. Cosmochim. Acta, 37 (1973) 1277.

    Google Scholar 

  16. M. J. Fuller, Chromatog. Rev., 14 (1971) 45.

    Google Scholar 

  17. C. F. Baes, Jr.,R. E. Mesmer, The Hydrolysis of Cations, John Wiley and Sons, New York, 1976.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Nuclear Chemistry Department, Hot Laboratories Centre, Atomic Energy Authority, Post Code 13759, Cairo, Egypt

    H. F. Ghoneimy

Authors
  1. H. F. Ghoneimy
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ghoneimy, H.F. Adsorption of Co2+ and Zn2+ on cryptomelane-type hydrous managese dioxide. J Radioanal Nucl Chem 223, 61–65 (1997). https://doi.org/10.1007/BF02223364

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02223364

Keywords

Search

Navigation