The effect of pH on chronic aquatic nickel toxicity is dependent on the pH itself: Extending the chronic nickel bioavailability models

Environmental Toxicology and Chemistry
Charlotte NysKarel A C De Schamphelaere

Abstract

The environmental quality standard for Ni in the European Commission's Water Framework Directive is bioavailability based. Although some of the available chronic Ni bioavailability models are validated only for pH ≤ 8.2, a considerable fraction of European surface waters has a pH > 8.2. Therefore, the authors investigated the effect of a change in pH from 8.2 to 8.7 on chronic Ni toxicity in 3 invertebrate (Daphnia magna, Lymnaea stagnalis, and Brachionus calyciflorus) and 2 plant species (Pseudokirchneriella subcapitata and Lemna minor). Nickel toxicity was almost always significantly higher at pH 8.7 than at pH 8.2. To test whether the existing chronic Ni bioavailability models developed for pH ≤ 8.2 can be used at higher pH levels, Ni toxicity at pH 8.7 was predicted based on Ni toxicity observed at pH 8.2. This resulted in a consistent underestimation of toxicity. The results suggest that the effect of pH on Ni(2+) toxicity is dependent on the pH itself: the slope of the pH effect is steeper above than below pH 8.2 for species for which a species-specific bioavailability model exists. Therefore, the existing chronic Ni bioavailability models were modified to allow predictions of chronic Ni toxicity to invertebrates and plan...Continue Reading

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Oct 22, 2013·Environmental Toxicology and Chemistry·Charlotte NysKarel A C De Schamphelaere

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Citations

Nov 1, 2016·Environmental Science & Technology·Dane T LambRavi Naidu
Jan 24, 2017·Environmental Toxicology and Chemistry·Tina Van RegenmortelKarel A C De Schamphelaere
Nov 15, 2017·Environmental Toxicology and Chemistry·Charlotte NysKarel A C De Schamphelaere
Jun 21, 2018·Environmental Toxicology and Chemistry·Adam PetersRick Krassoi
Feb 5, 2019·Environmental Toxicology and Chemistry·Adam PetersEmily Garman
Dec 28, 2019·Environmental Toxicology and Chemistry·Christopher A MebaneChris M Wood
Jun 17, 2020·Integrated Environmental Assessment and Management·Anne CrémazyChris M Wood
Jul 4, 2020·Environmental Toxicology and Chemistry·Joseph S MeyerChristian E Schlekat
May 10, 2020·Environmental Monitoring and Assessment·Jos P M VinkLeon P M Lamers
Jan 7, 2021·Integrated Environmental Assessment and Management·Emily R GarmanAmanda Reichelt-Brushett
Aug 5, 2021·The Science of the Total Environment·Patrick T GauthierAnne Crémazy

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