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Main Title pH-Dependent Toxicity of Cd, Cu, Ni, Pb and Zn to 'Ceriodaphnia dubia', 'Pimephales promelas', 'Hyalella azteca' and 'Lumbriculus variegatus'.
Author Schubauer-Berigan, M. K. ; Dierkes, J. R. ; Monson, P. D. ; Ankley., G. T. ;
CORP Author Environmental Research Lab.-Duluth, MN. ;AScI Corp., Duluth, MN.
Publisher c1993
Year Published 1993
Report Number EPA/600/J-94/193;
Stock Number PB94-163722
Additional Subjects Toxic tolerances ; Metals ; pH ; Fishes ; Aqueous solutions ; Changes ; Acidification ; Calcium carbonates ; Toxic tests ; Cadmium ; Nickle ; Zinc ; Copper ; Lead(Metal) ; Species diversity ; Toxicity tests ; Organisms ; Trace elements ; Reprint ; Ceriodaphnia dubia ; Pimephales promelas ; Hyalella azteca
Library Call Number Additional Info Location Last
NTIS  PB94-163722 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
The speciation and bioavailability of metals are known to be affected by pH. Although many studies have focused on effects on metals of pH changes resulting from lake acidification (i.e., pH change 7 to 4), metal toxicity changes at higher pH values (i.e., pH 6-9) are of great interest to those performing effluent and sediment toxicity testing and toxicity identification evaluations (TIEs). In addition, most previous studies have addressed metal toxicity changes with pH to water-column organisms rather than to benthic or epibenthic species. The authors tested the acute toxicity of five metals (Cd, Cu, Ni, Pb, and Zn) to Ceriodaphnia dubia, Pimephales promelas, Hyalella azteca, and Lumbriculus variegatus at three pH values (6.3, 7.3, and 8.3) in very hard reconstituted water (hardness 300-320 mg/l as CaCO3). Toxicity of Cd, Ni, and Zn was greatest at pH 8.3 and least at pH 6.3 to most of these species. Conversely, the toxicity of Cu and Pb was greatest at pH 6.3 and least at pH 8.3 to most of the species.