A surface precipitation model for the sorption of cations on metal oxides

Kevin J. Farley; David A. Dzombak; Francois M. M. Morel

doi:10.1016/0021-9797(85)90400-X

A surface precipitation model for the sorption of cations on metal oxides

Kevin J. Farley, David A. Dzombak, Francois M. M. Morel

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452 Scopus citations

Abstract

A new model for the sorption of cations on metal oxides is formulated which allows for a continuum between surface reactions and precipitation. The model extends the surface complexation approach by considering precipitation on the solid to be described by the formation of a solid solution whose composition varies continuously between that of the original solid and a pure precipitate of the sorbing cation. The ability of the surface precipitation model to describe the equilibrium sorption of metal cations on amorphous iron hydroxide is demonstrated. The model can also be extended to describe cation competition and anion sorption.

Original language	English (US)
Pages (from-to)	226-242
Number of pages	17
Journal	Journal of Colloid And Interface Science
Volume	106
Issue number	1
DOIs	https://doi.org/10.1016/0021-9797(85)90400-X
State	Published - Jul 1985

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/0021-9797(85)90400-X

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title = "A surface precipitation model for the sorption of cations on metal oxides",

abstract = "A new model for the sorption of cations on metal oxides is formulated which allows for a continuum between surface reactions and precipitation. The model extends the surface complexation approach by considering precipitation on the solid to be described by the formation of a solid solution whose composition varies continuously between that of the original solid and a pure precipitate of the sorbing cation. The ability of the surface precipitation model to describe the equilibrium sorption of metal cations on amorphous iron hydroxide is demonstrated. The model can also be extended to describe cation competition and anion sorption.",

author = "Farley, {Kevin J.} and Dzombak, {David A.} and Morel, {Francois M. M.}",

note = "Funding Information: This work was supported in part by NOAA Grant NA79AA-D-00077 and EPA Grant CR-811181-01-01 and a combined grant from American Electric Power Service Corporation, Duke Power Company, Northeast Utilities Service Company, and PS&G Research Corporation. The authors thank M. Benjamin whose laboratory studies helped inspire this work, as well as J. Westall and B. Hanrahan for their contributions.",

year = "1985",

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doi = "10.1016/0021-9797(85)90400-X",

language = "English (US)",

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T1 - A surface precipitation model for the sorption of cations on metal oxides

AU - Farley, Kevin J.

AU - Dzombak, David A.

AU - Morel, Francois M. M.

N1 - Funding Information: This work was supported in part by NOAA Grant NA79AA-D-00077 and EPA Grant CR-811181-01-01 and a combined grant from American Electric Power Service Corporation, Duke Power Company, Northeast Utilities Service Company, and PS&G Research Corporation. The authors thank M. Benjamin whose laboratory studies helped inspire this work, as well as J. Westall and B. Hanrahan for their contributions.

PY - 1985/7

Y1 - 1985/7

N2 - A new model for the sorption of cations on metal oxides is formulated which allows for a continuum between surface reactions and precipitation. The model extends the surface complexation approach by considering precipitation on the solid to be described by the formation of a solid solution whose composition varies continuously between that of the original solid and a pure precipitate of the sorbing cation. The ability of the surface precipitation model to describe the equilibrium sorption of metal cations on amorphous iron hydroxide is demonstrated. The model can also be extended to describe cation competition and anion sorption.

AB - A new model for the sorption of cations on metal oxides is formulated which allows for a continuum between surface reactions and precipitation. The model extends the surface complexation approach by considering precipitation on the solid to be described by the formation of a solid solution whose composition varies continuously between that of the original solid and a pure precipitate of the sorbing cation. The ability of the surface precipitation model to describe the equilibrium sorption of metal cations on amorphous iron hydroxide is demonstrated. The model can also be extended to describe cation competition and anion sorption.

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A surface precipitation model for the sorption of cations on metal oxides

Abstract

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