Application of native plants in constructed floating wetlands as a passive remediation approach for PFAS-impacted surface water

Autor: John Awad, Gianluca Brunetti, Albert Juhasz, Mike Williams, Divina Navarro, Barbara Drigo, Jeremy Bougoure, Joanne Vanderzalm, Simon Beecham
Přispěvatelé: Awad, John, Brunetti, Gianluca, Juhasz, Albert, Williams, Mike, Navarro, Divina, Drigo, Barbara, Bougoure, Jeremy, Vanderzalm, Joanne, Beecham, Simon
Rok vydání: 2021
Předmět:
Zdroj: Journal of hazardous materials. 429
ISSN: 1873-3336
Popis: Strategies for remediation of per- and polyfluoroalkyl substances (PFAS) generally prioritise highly contaminated source areas. However, the mobility of PFAS in the environment often results in extensive low-level contamination of surface waters across broad areas. Constructed Floating Wetlands (CFWs) promote the growth of plants in buoyant structures where pollutants are assimilated into plant biomass. This study examined the hydroponic growth of Juncus krausii, Baumea articulata and Phragmites australis over a 28-day period for remediation of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) contaminated (0.2 µg/L to 30 µg/L) urban stormwater. With increasing PFOA and PFOS concentrations, accumulation in plant species increased although root and shoot distribution varied depending on PFAS functional group. Less PFOA than PFOS accumulated in plant roots (0.006–0.16 versus 0.008–0.68 µg/g), while more PFOA accumulated in the plant shoots (0.02–0.55 versus 0.01–0.16 µg/g) indicating translocation to upper plant portions. Phragmites australis accumulated the highest overall plant tissue concentrations of PFOA and PFOS. The NanoSIMS data demonstrated that PFAS associated with roots and shoots was absorbed and not just surface bound. These results illustrate that CFWs have the potential to be used to reduce PFAS contaminants in surface waters. Refereed/Peer-reviewed
Databáze: OpenAIRE
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