2026-01-13 ミネソタ大学
- https://cse.umn.edu/college/news/university-minnesota-researchers-partner-new-method-trap-pfas-groundwater
- https://www.sciencedirect.com/science/article/pii/S0304389425032121
パーフルオロアルキル化合物およびポリフルオロアルキル化合物（PFAS）に汚染された地下水の原位置処理のためのポリマー安定化活性炭の現場実証 Toward a sustainable energy future using ammonia as an energy carrier: global supply chain cost and greenhouse gas emissions
James Hatton, Peng-Fei Yan, Chen Liu, Suna Jo, Jovan Popovic, Benjamin L. Rhiner, Joseph Wong, Micala Mitchek, Jiaqi Li, William A. Arnold, Matt F. Simcik, Kurt D. Pennell
Journal of Hazardous Materials Available online: 28 October 2025
DOI:https://doi.org/10.1016/j.jhazmat.2025.140292
Graphical Abstract
Highlights
- Laboratory aquifer cell test demonstrated the potential of an injectable sorbent (CCP).
- A push-pull CCP field test was conducted for in situ treatment of PFAS-impacted groundwater.
- PFAS concentrations were reduced by up to 4 orders-of-magnitude at 10-months post-injection.
- CCP treatment has much lower long-term operation costs than a “pump-and-treat” system.
Abstract
In situ remediation of groundwater impacted by per- and polyfluoroalkyl substances (PFAS) is challenging due to their resistance to destructive processes and the need to meet part-per-trillion (ng/L) drinking water standards. This study involved a field demonstration of a polymer-stabilized activated carbon (hereafter referred to as colloidal carbon product-CCP) using a “push-pull” test, consisting of a “push” phase (CCP injection) and a “pull” phase (withdrawal of treated groundwater), to assess the effectiveness of the treatment technology. A laboratory-scale aquifer cell experiment using site aquifer materials and simulated groundwater demonstrated 90.9 to > 99.9% removal of all six tested PFAS by CCP injection. For the field-scale test, a total of 1900-L CCP was injected into a 2.4-meter interval, and 4750 L of water were extracted from the treated interval, with extractions conducted at 3- and 10-months post-injection. Concentrations of PFAS were reduced by up to four orders-of-magnitude, from > 50,000 ng/L total PFAS to below individual detection limits in samples collected 10 months post-injection. An economic analysis indicates that operating costs of the CCP system would be less than half of a comparable “pump-and-treat” system. These findings demonstrate that CCP injection is a practical, efficient, and cost-effective in situ remediation strategy for addressing PFAS-impacted groundwater plumes.
