Perfluoroalkyl Substances in Arctic Polar Bear and Ringed Seal From East Greenland and Hudson Bay: Comparisons of Adipose and Liver Levels and Patterns, and In Vitro Depletion and Metabolite Formation of PFAS Precursors
Public Deposited- Resource Type
- Creator
- Abstract
The levels of 22 perfluorinated alkyl substances (PFASs) were examined in the livers of polar bears (PB) from Southern Hudson Bay (SHB) and Western Hudson Bay (WHB) and in the livers and adipose tissues of East Greenland (EG) PB and ringed seals (RS), all harvested in recent years. EG PB livers contained greater concentrations of ΣPFAS than SHB and WHB bears, while having greater proportions of perfluorooctane sulfonic acid (PFOS). ΣPFAS concentrations in EG PB were greater than in RS both in liver and in adipose, while no PFOS was detected in RS blubber. The biotransformation of N-Ethyl-perfluorooctane sulfonamide was significant for high enzymatic activity PB, while FOSA formation was not significant for low enzymatic activity RS. This thesis underlined the necessity to study the fate of PFASs in the Arctic marine foodweb, and the importance of short-chained PFASs and precursors when establishing PFAS exposure and levels.
- Subject
- Language
- Publisher
- Thesis Degree Level
- Thesis Degree Name
- Thesis Degree Discipline
- Identifier
- Rights Notes
Copyright © 2016 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
- Date Created
- 2016
Relations
- In Collection:
Items
Thumbnail | Title | Date Uploaded | Visibility | Actions |
---|---|---|---|---|
boisvert-perfluoroalkylsubstancesinarcticpolarbear.pdf | 2023-05-05 | Public | Download |