Comparing the Ecotoxicological Effects of Perfluorooctanoic Acid (PFOA) and Perfluorohexanoic Acid (PFHxA) on Freshwater Microbial Community
Laine, M. B., Vesamäki, J. S., Puupponen, V.-M., Tiirola, M., & Taipale, S. J. (2022). Comparing the Ecotoxicological Effects of Perfluorooctanoic Acid (PFOA) and Perfluorohexanoic Acid (PFHxA) on Freshwater Microbial Community. Frontiers in Environmental Science, 10, Article 888171. https://doi.org/10.3389/fenvs.2022.888171
Published inFrontiers in Environmental Science
DisciplineNanoscience CenterYmpäristötiedeResurssiviisausyhteisöAkvaattiset tieteetNanoscience CenterEnvironmental ScienceSchool of Resource WisdomAquatic Sciences
© 2022 Laine, Vesamäki, Puupponen, Tiirola and Taipale.
The ubiquitous presence of perfluorinated carboxylic acids (PFCAs) around the globe has attracted increasing attention, due to their persistency, bioaccumulation, and toxicity. Nevertheless, the ecotoxicological effects of the compounds on aquatic microorganisms has remained understudied. Hence, the present study focused on determining, and comparing, the effects of regulated long-chain PFCA, perfluorooctanoic acid (PFOA), and nonregulated short-chain PFCA, perfluorohexanoic acid (PFHxA), on the diversity, structure, microbial growth, and activity of a freshwater microbial community. In the experiment, lake water was incubated for a period of four weeks at three different concentrations of the studied PFCAs: 100 ng/L, 100 μg/L, and 10 mg/L. The results suggested that both compounds at high concentration (10 mg/L) altered the structure of the microbial community, but the diversity was not affected. Both compounds also decreased the microbial biovolume at higher concentrations and the increasing dose added to the significance of the impact, whereas inhibition of net microbial respiration could not be demonstrated. PFOA showed more potent toxicity towards the microbial community as it caused more significant structural changes to the community and significantly inhibited microbial growth even at the low 100 ng/L concentration. This study helps to better understand the ecotoxicity of PFCAs and to assess the environmental risks associated with their use. Additionally, these results can help policy makers to better assess the environmental risks posed by short-chain PFCAs on aquatic ecosystems. ...
PublisherFrontiers Media SA
Publication in research information system
MetadataShow full item record
Related funder(s)Academy of Finland
Funding program(s)Academy Project, AoF
Additional information about fundingThis research was supported by the Academy of Finland research grant 333564, awarded to ST, and by Work Scholarship granted for ML is 4221 by Maa-ja vesitekniikan tuki ry association.
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