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On the mechanism of specific phosphate adsorption by hydroxylated mineral surfaces: A review

Goldberg, Sabine, Sposito, Garrison·1985·Communications in Soil Science and Plant Analysis

Abstract

The mechanism of specific phosphate adsorption by hydroxy‐lated mineral surfaces comprises two aspects: the phosphate‐hydroxyl surface reaction and the configuration of the adsorbed phosphate ion. Evidence pointing to ligand exchange as the mechanism of the phosphate‐surface hydroxyl reaction include kinetics of adsorption and desorption; hydroxyl ion release; infrared spectroscopy, and stereochemical calculations. Data pertaining to the coordination of adsorbed phosphate on hydroxy‐lated mineral surfaces have not been conclusive overall. Isotopic exchange experiments and studies of desorption kinetics do not provide definitive information on surface coordination. Measurements of hydroxyl ion release and crystallographic calculations provide support for the existence of both monodentate and bidentate surface complexes of phosphate ions. Infrared spectroscopic investigations suggest a binuclear complex on dried, phosphated goethite. However, these studies cannot be extrapolated automatically to soil minerals, since the addition of water favors formation of a monodentate surface complex. Further research is needed to establish the configuration of adsorbed phosphate ions.

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Metadata

Authors
Goldberg, S., & Sposito, G.
Venue
Communications in Soil Science and Plant Analysis
Published
1985-08
Volume
16
Issue
8
Pages
801-821
ISSN
  • 0010-3624 (ISSN-L)
  • 1532-2416
OpenAlex
W2032202194
Cited by
227
References
0
FWCI
5.95
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: On the mechanism of specific phosphate adsorption by hydroxylated mineral surfaces: A review. https://app.cochat.ai/papers/10.1080/00103628509367646
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Goldberg, S., & Sposito, G. (1985). On the mechanism of specific phosphate adsorption by hydroxylated mineral surfaces: A review. Communications in Soil Science and Plant Analysis. https://doi.org/10.1080/00103628509367646

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