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RECORD NUMBER: 18 OF 29

OLS Field Name OLS Field Data
Main Title Measurements of Binding Site Concentrations in Humic Substances.
Author Perdue, E. M. ;
CORP Author Georgia Inst. of Tech., Atlanta. School of Geophysical Sciences.;Environmental Research Lab., Athens, GA.
Year Published 1988
Report Number EPA/600/D-88/090;
Stock Number PB88-211727
Additional Subjects Humic acids ; Metal complexes ; Complex compounds ; Ligands ; Metal ions
Holdings
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Status
NTIS  PB88-211727 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/04/1988
Collation 25p
Abstract The use of thermodynamic models to calculate the effects of humic substances on metal speciation requires that the complexation capacity (CC) of the humic substance be determined. If the CC of a humic substance is viewed as a compositional rather than a thermodynamic property, then the conventional approaches toward experimental measurements and calculations of complexation capacities need to be reexamined. It is proposed here that the CC of a humic substance is approximately equivalent to its total exchangeable acidity and that the extent to which this CC can be realized in experimental measurements is strongly a function of pH, ionic strength, nature of the metal being complexed, and the concentration of humic substances used in the measurements.
Supplementary Notes Sponsored by Environmental Research Lab., Athens, GA.
PUB Date Free Form May 88
Category Codes 99F
NTIS Prices PC A03/MF A01
Primary Description 600/01
Document Type NT
Cataloging Source NTIS/MT
Control Number 822518119
Origin NTIS
Type CAT