4.7 Article

Acute and chronic toxicity of short chained perfluoroalkyl substances to Daphnia magna

Journal

ENVIRONMENTAL POLLUTION
Volume 198, Issue -, Pages 47-53

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2014.12.025

Keywords

Acute and chronic toxicity; Daphnia magna; PFBA; PFHxA; PFOA

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The aim of this study was to evaluate the aquatic toxicity of a C4-C6 chemistry based fluoroallcylated polymer and the perfluoroalkyl carboxylic acids, PFBA, PFHxA and PFOA to Daphnia magna. The acute toxicity decreased with decreasing carbon chain length, but the polymer did not show a dose related effect. In a chronic toxicity test performed with PFHxA, mortality was observed at similar concentrations as in the acute toxicity test, indicating that toxicity did not increase with increasing exposure time. Effects on mortality, reproduction and population growth rate occurred at similar concentrations, indicating no specific effect of PFHxA on sublethal endpoints. C4-C6 chemistry is thus less hazardous to daphnids than C7-C8 chemistry. Yet, these compounds are persistent, hard to remove from the environment and production volumes are increasing. (C) 2014 Elsevier Ltd. All rights reserved.

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