Elsevier

Colloids and Surfaces

Volume 1, Issue 1, January 1980, Pages 33-44
Colloids and Surfaces

The reaction of phosphate with aluminum hydroxide in relation with phosphate bonding in soils

https://doi.org/10.1016/0166-6622(80)80036-9Get rights and content

Abstract

The retention of phosphate in soils is to a large extent determined by insoluble metal-oxides. In this paper, model studies are described on the uptake and release of phosphate by gibbsite (γ-Al(OH)3). At low phosphate concentration cp, the uptake is a pure monolayer exchange adsorption on the edge surfaces of the gibbsite platelets. At high cp and long reaction times, a precipitate is formed on top of this adsorbate. Kinetic equations are given to discriminate between these processes.

Our analysis leads to arguments in favour of applying slow-release phosphate fertilizers. In addition we analyse the effect on the precipitation of some ionic admixtures such as K+, Na+ and NH+4 that may be inadvertedly or intentionally present in the soil.

References (38)

  • A. Breeuwsma et al.

    J. Colloid Interface Sci.

    (1973)
  • R.J. Atkinson et al.

    Inorg. Nucl. Chem.

    (1972)
  • G.H. McClellan
  • J.W. Brinck
  • T.G. Bridges
  • J.C.R. Holford et al.

    J. Soil Sci.

    (1975)
  • Y.N. Tamini et al.

    Soil Sci.

    (1964)
  • J.F. Haseman et al.

    Soil Sci.

    (1950)
  • J.A. Kittrick et al.

    J. Soil Sci.

    (1956)
  • A.W. Taylor et al.

    Soil Sci. Soc. Am. Proc.

    (1965)
  • D. Muljadi et al.

    J. Soil Sci.

    (1966)
  • F.J. Hingston et al.

    J. Soil Sci.

    (1974)
  • K.R. Helyar et al.

    J. Soil Sci.

    (1976)
  • S. Kuo et al.

    Soil Sci.

    (1974)
  • R.L. Parfitt et al.

    J. Soil Sci.

    (1977)
  • J.H. Kyle et al.

    J. Soil Sci.

    (1975)
  • S.S.S. Rajan et al.

    J. Soil Sci.

    (1974)
  • J. Vanderdeelen et al.

    Pedologie

    (1971)
  • Y.S. Chen et al.

    Eviron. Sci. Technol.

    (1973)

    • Cited by (0)

    View full text
    Copyright © 1980 Published by Elsevier B.V.