Species- and tissue-specific chronic toxicity values for northern bobwhite quail (Colinus virginianus) exposed to perfluorohexane sulfonic acid and a binary mixture of perfluorooctane sulfonic acid and perfluorohexane sulfonic acid.

Nicole M. Dennis, Farzana Hossain, Seenivasan Subbiah, Adcharee Karnjanapiboonwong, Michael Dennis, Christopher McCarthy, William Jackson, Jordan Crago, Christopher J. Salice, Todd Anderson

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Per- and polyfluoroalkyl substances (PFAS) are globally distributed and present in nearly every environmental compartment. Characterizing the chronic toxicity of individual PFAS compounds and mixtures is necessary because many have been reported to cause adverse health effects. To derive toxicity reference values (TRVs) and conduct ecotoxicological risk assessments (ERAs) of PFAS-contaminated ecosystems for wildlife, species-specific PFAS chronic toxicity values (CTVs) are needed. The present study quantified PFAS residues from liver and eggs of birds chronically exposed to perfluorohexanoic acid (PFHxA) or a mixture of perfluorooctane sulfonate (PFOS) and PFHxA that produced a no-observable-adverse-effect level (NOAEL) and/or a lowest-observable-adverse-effectlevel (LOAEL). The CTVs we present are lower than those previously reported for birds and should be considered in future regulatory evaluations. From the estimated species- and tissue-specific PFAS CTVs, we found that PFOS and perfluorohexane sulfonate (PFHxS) were more bioaccumulative than PFHxA in avian tissues, but PFHxA was more toxic to reproducing birds than either PFOS or a PFOS:PFHxS mixture. We further determined that avian toxicity was not necessarily additive with respect to PFAS mixtures, which could have implications for PFAS ERAs. The PFAS LOAEL CTVs can be used to predict reproductive and possible population-level adverse health effects in wild avian receptors. Environ Toxicol Chem 2022;41:219–229.

Original languageEnglish
Pages (from-to)219-229
Number of pages11
JournalEnvironmental Toxicology and Chemistry
Volume41
Issue number1
DOIs
StatePublished - Jan 2022

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