Validation of the nickel biotic ligand model for locally relevant species in Australian freshwaters

Validation of the nickel biotic ligand model for locally relevant species in Australian freshwaters

Australian freshwaters have relatively low water hardness and different calcium (Ca) to magnesium (Mg) ratios compared with those in Europe. The hardness values of a substantial proportion of Australian freshwaters fall below the application boundary of the existing European nickel biotic ligand mod...

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Veröffentlicht in:Environmental toxicology and chemistry 2018-10, Vol.37 (10), p.2566-2574
Hauptverfasser: Peters, Adam, Merrington, Graham, Schlekat, Christian, De Schamphelaere, Karel, Stauber, Jennifer, Batley, Graeme, Harford, Andrew, van Dam, Rick, Pease, Ceiwen, Mooney, Tom, Warne, Michael, Hickey, Chris, Glazebrook, Peter, Chapman, John, Smith, Ross, Krassoi, Rick
Format: Artikel
Sprache:eng
Schlagworte:
Binding
Bioavailability
Biotic ligand model
Calcium carbonate
Fresh water
Hardness
Ligands
Magnesium
Mathematical models
Natural waters
Nickel
Organic chemistry
Species
Toxicity
Toxicity testing
Tropical ecotoxicology
Water chemistry
Water hardness
Water softening
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Zusammenfassung:Australian freshwaters have relatively low water hardness and different calcium (Ca) to magnesium (Mg) ratios compared with those in Europe. The hardness values of a substantial proportion of Australian freshwaters fall below the application boundary of the existing European nickel biotic ligand models (Ni BLMs) of 2 mg Ca/L. Toxicity testing was undertaken using Hydra viridissima to assess the predictive ability of the existing Ni BLM for this species in extremely soft waters. This testing revealed an increased competitive effect of Ca and Mg with Ni for binding to the biotic ligand in soft water (
ISSN:0730-7268
1552-8618
DOI:10.1002/etc.4213