Binding of nickel and copper to fish gills predicts toxicity when water hardness varies, but free-ion activity does not
Journal Article
·
· Environmental Science and Technology
- Univ. of Wyoming, Laramie, WY (United States). Dept. of Zoology and Physiology
- HydroQual, Inc., Mahwah, NJ (United States)
- Univ. of Delaware, Newark, DE (United States). Dept. of Civil and Environmental Engineering
Based on a biotic-ligand model (BLM), the authors hypothesized that the concentration of a transition metal bound to fish gills ([M{sub gill}]) will be a constant predictor of mortality, whereas a free-ion activity model is generally interpreted to imply that the chemical activity of the aquo (free) ion of the metal will be a constant predictor of mortality. In laboratory tests, measured [Ni{sub gill}] and calculated [Cu{sub gill}] were constant predictors of acute toxicity of Ni and Cu to fathead minnows (Pimephales promelas) when water hardness varied up to 10-fold, whereas total aqueous concentrations and free-ion activities of Ni and Cu were not. Thus, the BLM, which simultaneously accounts for (a) metal speciation in the exposure water and (b) competitive binding of transition-metal ions and other cations to biotic ligands predicts acute toxicity better than does free-ion activity of Ni or Cu. Adopting a biotic-ligand modeling approach could help establish a more defensible, mechanistic basis for regulating aqueous discharges of metals.
- OSTI ID:
- 335348
- Journal Information:
- Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 6 Vol. 33; ISSN ESTHAG; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Evaluation of several biological monitoring techniques for hazard assessment of potentially contaminated wastewater and groundwater. Volume 3. Old O-field groundwater. Final report, July 1990-December 1991
Chronic toxicity of nickel to the fathead minnow
Evaluation of diffusive gradients in thin films for prediction of copper bioaccumulation by yellow lampmussel ( Lampsilis cariosa ) and fathead minnow ( Pimephales promelas )
Technical Report
·
Sat Feb 29 23:00:00 EST 1992
·
OSTI ID:6503821
Chronic toxicity of nickel to the fathead minnow
Journal Article
·
Mon Dec 31 23:00:00 EST 1973
· J. - Water Pollut. Control Fed.; (United States)
·
OSTI ID:6914188
Evaluation of diffusive gradients in thin films for prediction of copper bioaccumulation by yellow lampmussel ( Lampsilis cariosa ) and fathead minnow ( Pimephales promelas )
Journal Article
·
Fri Mar 30 20:00:00 EDT 2018
· Environmental Toxicology and Chemistry
·
OSTI ID:1430748