Record Display for the EPA National Library Catalog


Main Title Cadmium Bioaccumulation Assays. Their Relationship to Various Ionic Equilibria in Lake Superior Water.
Author Poldoski, John E. ;
CORP Author Environmental Research Lab.-Duluth, MN.
Year Published 1979
Report Number EPA/600/J-79/042;
Stock Number PB80-124498
Additional Subjects Lake Superior ; Cadmium ; Chemical analysis ; Water pollution ; Concentration(Composition) ; Residues ; Metals ; Exposure ; Atomic Spectroscopy ; Chemical equilibrium ; Lake Superior ; Ions ; Reprints ; Water pollution detection ; Bioaccumulation ; Daphnia magna ; Heavy metals ; Atomic absorption spectroscopy ; Numerical solution
Library Call Number Additional Info Location Last
NTIS  PB80-124498 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
The potential use of bioaccumulation by Daphnia magna as an analytical tool in studying properties of various aqueous cadmium forms is described. Selected aquatic chemical factors affecting cadmium residues were determined for organisms exposed to cadmium in the absence and presence of various organic and inorganic chemicals, some capable of strongly complexing cadmium. Without any added complexing agents, steady-state relationships were observed between total aqueous cadmium concentrations and bioaccumulated cadmium within 2-4 days of exposure. Residues were a nonlinear function of the concentration. The presence of humic acid, pyrophosphate, or aminopolycarboxylic acids, at sufficient concentrations to maximize complexation, was effective--to various degrees--in reducing cadmium uptake. However, cadmium in the presence of diethyldithiocarbamate bioaccumulated to a greater degree than in its absence.