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Evaluation of diffusive gradients in thin films for prediction of copper bioaccumulation by yellow lampmussel ( Lampsilis cariosa ) and fathead minnow ( Pimephales promelas )

Journal Article · · Environmental Toxicology and Chemistry
DOI:https://doi.org/10.1002/etc.4108· OSTI ID:1430748
 [1];  [1];  [1];  [2]
  1. Savannah River Ecology Laboratory University of Georgia Aiken South Carolina USA
  2. Warnell School of Forestry and Natural Resources University of Georgia Athens Georgia USA
Abstract

Using a coupled method of diffusive gradients in thin films (DGT) exposure with aquatic organism bioassays, we assessed the use of DGT as a tool for estimating copper (Cu) bioavailability in contaminated waters. The DGT‐accumulated Cu fraction could possibly be used as a surrogate for other assessments of metal bioavailability. The Cu concentrations in fathead minnow ( Pimephales promelas ) and yellow lampmussel ( Lampsilis cariosa ) soft tissue were compared with DGT‐accumulated Cu after 2, 4, and 6 d of exposure to a Cu concentration series in static, water‐only assays. The DGT‐accumulated Cu was found to include free Cu ions, labile inorganic Cu complexes, and labile dissolved organic matter Cu complexes, compared with Cu speciation output from the biotic ligand model. Regressions of Cu concentrations between DGT and fathead minnow at 4 and 6 d of exposure demonstrated linear relationships. The Cu bioaccumulated in yellow lampmussel was overpredicted by DGT at Cu concentrations greater than 10 µg L −1 , which may be caused by internal regulation of Cu. The speciation component of the biotic ligand model predicted relationships between inorganic Cu and animal‐accumulated Cu that were similar to predicted relationships between DGT‐indicated Cu and animal‐accumulated Cu at all deployment durations. Environ Toxicol Chem 2018;37:1535–1544. © 2018 SETAC

Sponsoring Organization:
USDOE
Grant/Contract Number:
FC09-07SR22506
OSTI ID:
1430748
Alternate ID(s):
OSTI ID: 1537561
Journal Information:
Environmental Toxicology and Chemistry, Journal Name: Environmental Toxicology and Chemistry Journal Issue: 6 Vol. 37; ISSN 0730-7268
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English

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