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Byrne, P, Biles, E, Cui, L, Williams, R, Faustino-Eslava, D, Quick, L, Casa, M, Gonzalvo, I, Regalado, M, Cabrera, K, Fenio, K, Padrones, J, Guotana, JM, Hudson-Edwards, K, Vasilopoulos, G, Coulthard, T, Tortajada, C, Villanueva-Peyraube, J, Sevilla-Nastor, J, Domingo, J and Megson, D Forever but not everywhere? Unexpected non-detection of per- and polyfluoroalkyl substances (PFAS) in major Philippines rivers. River. (Accepted)
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Forever but not everywhere Unexpected non-detection of per- and polyfluoroalkyl substances (PFAS) in major Philippines rivers.pdf - Accepted Version Download (1MB) | Preview |
Abstract
Recent studies suggest per- and polyfluoroalkyl substances (PFAS) are ubiquitous in rivers worldwide. In the Asia-Pacific region, the frequency of PFAS detection in rivers is believed to be increasing. However, the overwhelming majority of studies and data represent high population and urbanised river catchments. In this study, we investigate PFAS occurrence in major Philippine river systems characterised by both high and low population densities. In the Pasig Laguna de Bay River, which drains a major urban conurbation, we detected PFAS at concentrations typical of global rivers. Unexpectedly, we did not detect PFAS in river water or sediments in low population density river catchments, despite our instrument detection limits being lower than the vast majority of river concentrations reported worldwide. We hypothesise that septic tanks, as the dominant wastewater treatment practice in Philippines catchments, may control the release of PFAS into groundwater and rivers in the Philippines. However, no groundwater PFAS data currently exist to validate this supposition. More broadly, our findings highlight the need for more representative PFAS sampling in rivers to more accurately represent regional and global detection frequencies and trends.
| Item Type: | Article |
|---|---|
| Subjects: | G Geography. Anthropology. Recreation > GB Physical geography G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Divisions: | Biological and Environmental Sciences (from Sep 19) |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 06 Feb 2025 14:26 |
| Last Modified: | 06 Feb 2025 14:30 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/25561 |
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