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OLS Field Name OLS Field Data
Main Title Evaluation of Mathematical Models for the Effects of pH and Temperature on Ammonia Toxicity to Aquatic Organisms.
Author Erickson, R. J. ;
CORP Author College of Saint Scholastica, Duluth, MN. Dept. of Chemistry.;Environmental Research Lab., Duluth, MN.
Year Published 1985
Report Number EPA-R-809367 ;EPA-R-809240; EPA/600/J-85/527;
Stock Number PB88-205794
Additional Subjects Ammonia ; Toxicity ; Water pollution ; Marine microorganisms ; Mathematical models ; Reprints ;
Holdings
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NTIS  PB88-205794 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 14p
Abstract Available data on the pH and temperature dependence of ammonia toxicity to aquatic organisms were examined and their agreement with various models was evaluated. A model which considers alteration of the relative concentration of un-ionized ammonia at the gill surface failed to adequately describe either pH or temperature dependence. A model that assumes that un-ionized ammonia and ammonium ion are jointly toxic was strongly supported by the data on pH dependence, but could not explain observed temperature dependence. Temperature dependence can be described empirically by a simple log-linear model. The effects of pH and temperature were generally found to be qualitatively and quantitatively similar among fish species. (Copyright (c) 1985 Pergamon Press Ltd.)
Supplementary Notes Pub. in Water Resources, v19 n8 p1047-1058 Aug 85. Sponsored by Environmental Research Lab., Duluth, MN.
NTIS Title Notes Journal article.
Title Annotations Reprint: Evaluation of Mathematical Models for the Effects of pH and Temperature on Ammonia Toxicity to Aquatic Organisms.
PUB Date Free Form c1985
Category Codes 57Y; 68D
NTIS Prices PC A03/MF A01
Primary Description 600/03
Document Type NT
Cataloging Source NTIS/MT
Control Number 819624358
Origin NTIS
Type CAT