Does water temperature influence the distribution and elimination of perfluorinated substances in rainbow trout (Oncorhynchus mykiss)?

• Published in: Environmental science and pollution research international 2019-06, Vol.26 (16), p.16355-16365
• Main Authors: Vidal, Alice, Lafay, Florent, Daniele, Gaelle, Vulliet, Emmanuelle, Rochard, Eric, Garric, Jeanne, Babut, Marc
• Format: Article
• Language: English
• Subjects: Analytical chemistry; Aquatic ecosystems; Aquatic organisms; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Bioaccumulation; Blood; Brain; Chemical Sciences; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental science; Environmental Sciences; Exposure; Fish; Freshwater ecosystems; Liver; Muscles; Oncorhynchus mykiss; Organs; Perfluorohexane; Physiological effects; Research Article; Salmon; Sulfonates; Temperature control; Temperature effects; Trout; Waste Water Technology; Water Management; Water Pollution Control; Water temperature
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-019-05029-w

Perfluorinated and polyfluorinated substances (PFASs) are widely found in freshwater ecosystems because of their resistance to degradation and their ability to accumulate in aquatic organisms. While water temperature controls many physiological processes in fish, knowledge of the effects of this factor on PFAS toxicokinetic is still limited. This study presents experimental results of internal distribution and elimination rates of two perfluorinated acid compounds, namely perfluorooctane sulfonate (PFOS) and perfluorohexane sulfonate (PFHxS) in adult rainbow trout ( Oncorhynchus mykiss ) exposed to three temperatures. Dietary exposure experiments were conducted at 7 °C, 11 °C, and 19 °C and liver, blood, muscle, brain, and kidney were sampled for analysis. PFOS concentrations were comparable to or exceeded those of PFHxS, while PFHxS was eliminated faster than PFOS, whatever the temperature. Internal distribution changed significantly for both substances when fish were exposed to a range of temperatures from 7 to 19 °C. Indeed, PFOS and PFHxS relative distribution increased in blood, liver, and brain while they decreased in muscle when the water temperature rose. The water temperature variation affected the elimination half-lives, depending on the substances and organs.