Impact of natural organic matter and increased water hardness on DGT prediction of copper bioaccumulation by yellow lampmussel (Lampsilis cariosa) and fathead minnow (Pimephales promelas)
| Autor: | Rebecca R. Philipps, Robert B. Bringolf, Gary L. Mills, Xiaoyu Xu |
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| Rok vydání: | 2017 |
| Předmět: |
Unionidae
Aquatic Organisms 010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis Cyprinidae 010501 environmental sciences Toxicology Ligands 01 natural sciences Hardness Lampsilis cariosa Animals Organic matter Humic Substances 0105 earth and related environmental sciences chemistry.chemical_classification biology Chemistry Biotic Ligand Model Hard water Aquatic animal General Medicine biology.organism_classification Pollution Bioaccumulation Environmental chemistry Soft water Pimephales promelas Copper Water Pollutants Chemical |
| Zdroj: | Environmental pollution (Barking, Essex : 1987). 241 |
| ISSN: | 1873-6424 |
| Popis: | We conducted an exposure experiment with Diffusive Gradients in Thin- Films (DGT), fathead minnow (Pimephales promelas), and yellow lampmussel (Lampsilis cariosa) to estimate bioavailability and bioaccumulation of Cu. We hypothesized that Cu concentrations measured by DGT can be used to predict Cu accumulation in aquatic animals and alterations of water chemistry can affect DGT's predict ability. Three water chemistries (control soft water, hard water, and addition of natural organic matter (NOM)) and three Cu concentrations (0, 30, and 60 μg/L) were selected, so nine Cu-water chemistry combinations were used. NOM addition treatments resulted in decreased concentrations of DGT-measured Cu and free Cu ion predicted by Biotic Ligand Model (BLM). Both hard water and NOM addition treatments had reduced concentrations of Cu ion and Cu-dissolved organic matter complexes compared to other treatments. DGT-measured Cu concentrations were linearly correlated to fish accumulated Cu, but not to mussel accumulated Cu. Concentrations of bioavailable Cu predicted by BLM, the species complexed with biotic ligands of aquatic organisms and, was highly correlated to DGT-measured Cu. In general, DGT-measured Cu fit Cu accumulations in fish, and this passive sampling technique is acceptable at predicting Cu concentrations in fish in waters with low NOM concentrations. |
| Databáze: | OpenAIRE |
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