Main Title |
Cadmium Speciation in Aquatic-Life Flow-through Bioassay Diluters. |
Author |
Poldoski, J. E. ;
Benoit, D. A. ;
Carlson, A. R. ;
Mattson, V. R. ;
|
CORP Author |
Environmental Research Lab.-Duluth, MN. |
Year Published |
1987 |
Report Number |
EPA/600/D-87/236; |
Stock Number |
PB87-212692 |
Additional Subjects |
Cadmium ;
Water pollution ;
Lake Superior ;
Chemical reactions ;
Concentration(Composition) ;
Calcium carbonates ;
Humic acids ;
Suspended sediments ;
Clay soils ;
Reaction kinetics ;
pH ;
Ions ;
Chemical equilibrium ;
Mathematical models ;
Potentiometric analysis ;
Dialysis ;
Membranes ;
Filtration ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB87-212692 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
38p |
Abstract |
A framework of cadmium speciation studies is described for flow-through mini-diluter bioassay systems which employs Lake Superior water containing added concentrations of calcium carbonate, Aldrich humic acid and/or less than 2 microns suspended Lake Superior red clay. Aspects of the flow-through diluter function were qualitatively related to major changes in the observed Cd(2+) concentration as a function of time and different water quality chemical variables. The most significant variable was the red clay, which markedly accelerated the rate of loss of Cd(2+) from Lake Superior water containing added CaCO3. This acceleration factor was highly sensitive to other variables such as pH and humic acid. In addition, ion selective electrode (ISE) potentiometry, dialysis, and membrane filtration were used to verify an ionic chemical equilibrium model designed to describe various dissolved cadmium specie concentrations. |
PUB Date Free Form |
Jul 87 |
Category Codes |
68D; 48G; 99A; 99E |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/03 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
726829223 |
Origin |
NTIS |
Type |
CAT |