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Enhancing per- and polyfluoroalkyl substances (PFAS) pollution retention by superabsorbent polymer (SAP) amended to a grass swale prototype of green infrastructure

Project description

Bio-based polymers could prevent PFAS from spreading into urban water systems

Per- and polyfluoroalkyl substances (PFAS), or ‘forever chemicals’, are a growing environmental concern, especially in urban areas facing extreme weather. With the support of the Marie Skłodowska-Curie Actions Programme, the PFAS-RETENT project plans to use superabsorbent polymers (SAPs), which are known for retaining water, to enhance PFAS removal in green stormwater infrastructure like grass swales. The proposed research will test the SAP’s ability to trap short-chain PFAS using a step-by-step approach: beginning with lab experiments before moving to small-scale grass swale set-ups and testing under nearly real-world conditions. SAPs could act as temporary barriers by trapping PFAS during storm deluges and allowing vegetation to take them up during droughts.

Objective

Per- and polyfluoroalkyl substances (PFAS), referred to as “forever chemicals”, are contaminants of escalating global concern. Superabsorbent polymers (SAPs), known for their high-water retention, offer a potential new approach for enhancing PFAS removal within green stormwater infrastructure (GSI), like grass swales, particularly in the face of climate change-driven weather events in urban environments. This project will focus on evaluating the retention potential of a group of highly mobile, short-chain PFAS, using a biological-based SAP integrated into a grass swale framework (prototype). To accomplish this, these specific working objectives (WOs) will be employed: WO1: evaluation of the retention and release processes of SAP for short-chain PFAS, using batch retention experiments (simple framework); WO2: assessing the efficacy of SAP in removing short-chain PFAS when incorporated into lab-scaled, grass-planted microcosms (simple framework of a grass swale system); WO3: assessing the efficacy of SAP in removing short-chain PFAS, when incorporated into flow-through, grass-planted mesocosms (‘real-world’ framework of a grass swale system). WO2 and WO3 experiments will employ percolation and drought simulations to evaluate SAP retention performance for PFAS during these conditions. The overall methodology will follow a 3-stage stepwise approach that starts with simple designs (batch experiments–WO1, microcosms–WO2) then increase in complexity to nearly real-world scenario (horizontal flow-through mesocosms–WO3). SAP integrated into swale substrates could serve as a temporary “removal” barrier for PFAS during storm runoff, thereby limiting their distribution throughout urban water systems and the water cycle. During drought periods, PFAS trapped in the water-saturated gel phase of the SAP (along with the water) could be taken up by vegetation within the GSI, preventing their release to nearby water bodies and reducing contamination risks to urban water resources.

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HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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(opens in new window) HORIZON-MSCA-2024-PF-01

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Coordinator

UNIVERSITAT KOBLENZ
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 202 125,12
Address
UNIVERSITATSSTRASSE 1
56070 KOBLENZ
Germany

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Region
Rheinland-Pfalz Koblenz Koblenz, Kreisfreie Stadt
Activity type
Higher or Secondary Education Establishments
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Total cost

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