Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Generalization of Water Quality Criteria Using Chemical Models: Development of the REDEQL-UMD System of Computer Programs for Aqueous Equilibria. Part 1. Users Manual.
Author Harriss, D. K. ; Ingle, S. E. ; Taylor, D.K. ; Magnuson, V. R. ;
CORP Author State Univ. of New York at Albany. ;Minnesota Univ., Minneapolis. Dept. of Ecology and Behavioral Biology.;Environmental Research Lab.-Duluth, MN.
Year Published 1984
Report Number EPA-R-804996; EPA-600/3-84-007A;
Stock Number PB84-135508
Additional Subjects Water quality ; Metals ; Chemical properties ; Mathematical models ; Chemical equilibrium ; Computer programs ; Complex compounds ; Water pollution ; Thermodynamic properties ; Toxicity ; Water pollution ; User manuals(Computer programs) ; Water pollution effects(Animals)
Library Call Number Additional Info Location Last
NTIS  PB84-135508 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 200p
This research program had the primary objective of developing site-specific water quality criteria for metals through correlating aquatic toxicity with activities of metal species. The project was not intended to carry out experimental studies but to make use of existing literature reports of metal toxicity to generate the correlations. Inherent in these studies was the need for knowledge of the number of metal species present, and the relative amounts of each. To meet these needs a set of computer programs for finding equilibrium concentrations of metal complexes REDEQL-UMD, was developed, along with a stability constant data base and associated reference-footnote data bases. Literature values of stability constant were adjusted to 25 C by application of thermodynamic principles. Once speciation and toxicity data were available, a combination of factor analysis and multiple regression analysis was used to develop correlations. A detailed example involving toxicity of copper to Daphnia magna is included.