A United Physicochemical Description of the Protonation and Metal Ion Complexation Equilibria of Natural Organic Acids (Humic and Fulvic Acids). 2. Influence of Polyelectrolyte Properties and Functional Group Heterogeneity on the Protonation Equilibria of Fulvic Acid

James Ephraim; Salvador Alegret; Andrew Mathuthu; Margaret BIcking; Jacob A. Marinsky; Ronald L. Malcolm

doi:10.1021/es00146a007

A United Physicochemical Description of the Protonation and Metal Ion Complexation Equilibria of Natural Organic Acids (Humic and Fulvic Acids). 2. Influence of Polyelectrolyte Properties and Functional Group Heterogeneity on the Protonation Equilibria of Fulvic Acid

James Ephraim, Salvador Alegret, Andrew Mathuthu, Margaret BIcking, Jacob A. Marinsky, Ronald L. Malcolm

Department of Chemistry

Research output: Contribution to journal › Article › Research › peer-review

127 Citations (Scopus)

Abstract

Potentiometric studies of the neutralization of several fulvic acid sources with standard base in aqueous and nonaqueous media have been conducted. Analysis of the results with a recently developed unified physicochemical model has shown that the protonation behavior of these fulvic acid sources is a reflection of (1) their polyelectrolyte nature and (2) their heterogeneity. It has been possible to ascribe the polyelectrolyte properties observed to a rather inflexible fulvic acid molecule whose variably charged surface is impermeable to simple electrolyte. © 1986, American Chemical Society. All rights reserved.

Original language	English
Pages (from-to)	354-366
Journal	Environ. Sci. Technol.
Volume	20
Issue number	4
DOIs	https://doi.org/10.1021/es00146a007
Publication status	Published - 1 Jan 1986

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Ephraim, J., Alegret, S., Mathuthu, A., BIcking, M., Marinsky, J. A., & Malcolm, R. L. (1986). A United Physicochemical Description of the Protonation and Metal Ion Complexation Equilibria of Natural Organic Acids (Humic and Fulvic Acids). 2. Influence of Polyelectrolyte Properties and Functional Group Heterogeneity on the Protonation Equilibria of Fulvic Acid. Environ. Sci. Technol., 20(4), 354-366. https://doi.org/10.1021/es00146a007

Ephraim, James ; Alegret, Salvador ; Mathuthu, Andrew et al. / A United Physicochemical Description of the Protonation and Metal Ion Complexation Equilibria of Natural Organic Acids (Humic and Fulvic Acids). 2. Influence of Polyelectrolyte Properties and Functional Group Heterogeneity on the Protonation Equilibria of Fulvic Acid. In: Environ. Sci. Technol. 1986 ; Vol. 20, No. 4. pp. 354-366.

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abstract = "Potentiometric studies of the neutralization of several fulvic acid sources with standard base in aqueous and nonaqueous media have been conducted. Analysis of the results with a recently developed unified physicochemical model has shown that the protonation behavior of these fulvic acid sources is a reflection of (1) their polyelectrolyte nature and (2) their heterogeneity. It has been possible to ascribe the polyelectrolyte properties observed to a rather inflexible fulvic acid molecule whose variably charged surface is impermeable to simple electrolyte. {\textcopyright} 1986, American Chemical Society. All rights reserved.",

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Ephraim, J, Alegret, S, Mathuthu, A, BIcking, M, Marinsky, JA & Malcolm, RL 1986, 'A United Physicochemical Description of the Protonation and Metal Ion Complexation Equilibria of Natural Organic Acids (Humic and Fulvic Acids). 2. Influence of Polyelectrolyte Properties and Functional Group Heterogeneity on the Protonation Equilibria of Fulvic Acid', Environ. Sci. Technol., vol. 20, no. 4, pp. 354-366. https://doi.org/10.1021/es00146a007

A United Physicochemical Description of the Protonation and Metal Ion Complexation Equilibria of Natural Organic Acids (Humic and Fulvic Acids). 2. Influence of Polyelectrolyte Properties and Functional Group Heterogeneity on the Protonation Equilibria of Fulvic Acid. / Ephraim, James; Alegret, Salvador; Mathuthu, Andrew et al.

In: Environ. Sci. Technol., Vol. 20, No. 4, 01.01.1986, p. 354-366.

Research output: Contribution to journal › Article › Research › peer-review

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AB - Potentiometric studies of the neutralization of several fulvic acid sources with standard base in aqueous and nonaqueous media have been conducted. Analysis of the results with a recently developed unified physicochemical model has shown that the protonation behavior of these fulvic acid sources is a reflection of (1) their polyelectrolyte nature and (2) their heterogeneity. It has been possible to ascribe the polyelectrolyte properties observed to a rather inflexible fulvic acid molecule whose variably charged surface is impermeable to simple electrolyte. © 1986, American Chemical Society. All rights reserved.

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Ephraim J, Alegret S, Mathuthu A, BIcking M, Marinsky JA, Malcolm RL. A United Physicochemical Description of the Protonation and Metal Ion Complexation Equilibria of Natural Organic Acids (Humic and Fulvic Acids). 2. Influence of Polyelectrolyte Properties and Functional Group Heterogeneity on the Protonation Equilibria of Fulvic Acid. Environ. Sci. Technol. 1986 Jan 1;20(4):354-366. doi: 10.1021/es00146a007