2025-08-12 ニューサウスウェールズ大学(UNSW)
＜関連情報＞
- https://www.unsw.edu.au/newsroom/news/2025/08/more-pfas-forever-chemicals-sydney-tap-water-previously-thought
- https://www.sciencedirect.com/science/article/pii/S0045653525005569
- https://www.sciencedirect.com/science/article/pii/S030438942501595X
シドニーの飲料水中のペルフルオロアルキル物質（PFAS）の評価 Assessment of per- and polyfluoroalkyl substances in Sydney drinking water
Lisa Hua, William A. Donald
Chemosphere Available online: 11 August 2025
DOI:https://doi.org/10.1016/j.chemosphere.2025.144611
Graphical abstract
Highlights
- First detection of 3:3 FTCA in global drinking water supply.
- First detection of 6:2 diPAP in tap water.
- 31 PFAS detected in drinking water samples collected around Sydney, Australia.
- 21 additional PFAS identified compared to previous Australian studies.
Abstract
Per- and polyfluoroalkyl substances (PFAS) have emerged as major persistent organic contaminants in global drinking water supplies. While PFAS contamination has been widely reported, their occurrence in Australian drinking water remains understudied. To address this gap, 32 tap water and 12 bottled water samples were collected across Sydney, Australia. The samples were preconcentrated using StrataX-AW solid-phase extraction (SPE) cartridges and analysed for 50 PFAS compounds using liquid chromatography-tandem mass spectrometry (LC-MS/MS), obtaining ultra-trace detection limits (0.031–5.1 ppt), low relative standard deviation (9–12 %), and high recovery (92–99 %). Of the 50 PFAS monitored, 31 were detected, including the first-reported detection of a short-chained fluorotelomer carboxylic acid (3:3 FTCA) in any drinking water and a fluorophosphoric acid diester (6:2 diPAP) in tap water. Compared to previous studies, 21 PFAS were detected in Sydney tap water that had not been previously reported in Australia. PFAS profiles differed between the catchment source and drinking tap water, persisting or appearing in altered proportions at the tap. Notably, maximum PFOS concentrations in some North Richmond catchment samples (6 ppt) were at or above U.S. EPA (4 ppt) but below endorsed 2025 Australian drinking water guidelines (8 ppt). These findings expand current knowledge of PFAS occurrence in drinking water and underscore the need for further assessment of their sources, distribution and environmental persistence.
水中の50種類のペルフルオロアルキル物質の吸着除去と超微量定量のための二重機能性金属有機フレームワーク Dual-functional metal-organic frameworks for adsorptive removal and ultra-trace quantitation of 50 per- and polyfluoroalkyl substances in water
Lisa Hua, Marcello B. Solomon, Deanna M. D’Alessandro, William A. Donald
Journal of Hazardous Materials Available online: 19 May 2025
DOI:https://doi.org/10.1016/j.jhazmat.2025.138679
Highlights
- MOFs were tested for the remediation and detection of PFAS at trace concentrations.
- Remediation: UiO-67 is the most effective at removing PFAS from solution.
- Detection: Defective UiO-66 is the most effective at analysing PFAS from solution.
- Detection limits using MOFs as low as 17 ppq were achieved with average LOD of 144 ppq.
- Environmental water samples, 25 PFAS detected above quantification limits.
Abstract
Per- and polyfluoroalkyl substances (PFAS) are persistent and pervasive environmental contaminants associated with significant health risks. Recent regulatory shifts reducing safe drinking water advisory limits to parts-per-quadrillion (pg/L) levels underscore the urgent need for robust methodologies capable of detecting and removing PFAS at ultra-trace concentrations. In this study, six metal-organic frameworks (MOFs) were systematically evaluated for their dual functionality to preconcentrate PFAS for ultra-trace analysis by liquid chromatography-tandem mass spectrometry (LC-MS/MS) and as sorbents for adsorptive removal of PFAS from water at environmentally relevant concentrations (200 pg/L to 2 µg/L). UiO-66 enabled the quantification of 50 PFAS at spiked concentrations as low as 200 pg/L, with detection limits down to 17 pg/L. These results are comparable to, or better than conventional technical sorbents in LC-MS/MS workflows involving 50 PFAS, whilst using less sorbent (100 vs 250 mg) and volume (250 vs 1000 mL) per sample. In parallel, UiO-67 removed an average of 99% of all 50 PFAS (2 µg/L) from water within 30 min using 10 mg of material. Together, these findings demonstrate the viability of MOFs for both ultra-trace analysis and removal of diverse PFAS chemistries in environmental water matrices, offering a promising strategy for integrated environmental monitoring and treatment.
