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Main Title Competitive Binding of Protons and Metal Ions in Humic Substances by Lanthanide Ion Probe Spectroscopy.
Author Dobbs, J. C. ; Susetyo, W. ; Carreira, L. A. ; Azarraga., L. V. ;
CORP Author Environmental Research Lab., Athens, GA. ;Georgia Univ., Athens. Dept. of Chemistry.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/192;
Stock Number PB90-140765
Additional Subjects Humus ; Metal complexes ; Proton reactions ; Spectrum analysis ; Mathematical models ; Thermodynamics ; Chemical bonds ; pH ; Ligands ; Environmental surveys ; Reprints ; Metal ions ; Gaussian distribution complexation model ; Ion probes
Library Call Number Additional Info Location Last
NTIS  PB90-140765 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
A pH-dependent, continuous, multiligand model is described. It is based on the Gaussian distribution model, which has been used to describe both binding by humic substances as well as metal binding by humic substances. However, the Gaussian distribution model has never been used to describe the competitive binding of the metalated and protonated ligand species. The inclusion of pH dependence should allow one to predict metal binding constants that are more representative of true thermodynamic binding constant rather than curve-fitting parameters with no chemical significance. (Copyright (c) 1989 American Chemical Society.)