Mono- and divalent competitive adsorption to a charged membrane in a closed system: A comparative study

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Abstract

Competitive adsorption to a negative surface between monovalent and divalent cations is studied in a closed system. A self-consistent theory is presented for the cases when the divalent cation binds to two negative sites (1:2 binding) and to one negative site (1:1 binding). It is demonstrated that these two cases are distinguishable when the relative difference in total divalent concentrations determined at fixed bulk divalent concentrations is plotted as a function of the bulk monovalent concentration. The 1:2 binding case yields a sigmoidal curve while the 1:1 binding curve is hyperbolic. The comparison between the 1:2 and 1:1 binding cases of the divalent cation is extended to include; (1) the existence of a surface charge to which no binding occurs, and (2) the case when an additional non-binding monovalent cation is present.

Original languageEnglish
Pages (from-to)633-649
Number of pages17
JournalJournal of Theoretical Biology
Volume94
Issue number3
DOIs
StatePublished - Feb 7 1982

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closed loop systems
Divalent Cations
Adsorption
Comparative Study
Monovalent Cations
cations
adsorption
Membrane
Positive ions
Membranes
Closed
Surface charge
Curve
Charge

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

Cite this

Mono- and divalent competitive adsorption to a charged membrane in a closed system : A comparative study. / Kolber, Michael A.

In: Journal of Theoretical Biology, Vol. 94, No. 3, 07.02.1982, p. 633-649.

Research output: Contribution to journalArticle

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