Development of a statistical model for metal-humic interactions

A statistical model for describing the distribution of binding sites in humic substances was developed. The model was applied to study the spectral titration plot generated by the lanthanide ion probe spectroscopy (LIPS) technique. This titration plot is used as a basis for studying the interactions...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 1990-07, Vol.62 (13), p.1215-1221
Main Authors: Susetyo, W, Dobbs, J. C, Carreira, L. A, Azarraga, L. V, Grimm, D. M
Format: Article
Language:English
Subjects:
540210 - Environment, Terrestrial- Basic Studies- (1990-)
540310 - Environment, Aquatic- Basic Studies- (1990-)
Applied sciences
Biological and physicochemical phenomena
CALCULATION METHODS
CHEMICAL REACTIONS
ELEMENTS
ENVIRONMENTAL SCIENCES
EUROPIUM
Exact sciences and technology
HUMIC ACIDS
ION PROBES
MATHEMATICAL MODELS
METALS
Natural water pollution
ORGANIC ACIDS
ORGANIC COMPOUNDS
Pollution
PROBES
RARE EARTHS
SPECTROSCOPY
STATISTICAL MODELS
Water treatment and pollution
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Summary:A statistical model for describing the distribution of binding sites in humic substances was developed. The model was applied to study the spectral titration plot generated by the lanthanide ion probe spectroscopy (LIPS) technique. This titration plot is used as a basis for studying the interactions between metal ions and humic binding sites. Humic samples were titrated with Eu{sup 3+}, which acts as the fluorescent probe ion. The competition effects between a proton, a metal ion other than the probe ion, and the probe ion itself in binding with the humic binding sites, as well as the electrostatic effects, are successfully predicted and described by the model.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac00212a005