Investigating rate-limited sorption, sorption to air-water interfaces, and colloid-facilitated transport during PFAS leaching.

ABSTRACT: Various sorption processes affect leaching of per- and polyfluoroalkyl substances (PFAS) such as PFOA and PFOS. The objectives of this study are to (1) compare rate-limited leaching in column and lysimeter experiments, (2) investigate the relevance of sorption to air-water interfaces (AWI), and (3) examine colloid-facilitated transport as a process explaining early experimental breakthrough. A continuum model (CM) with two-domain sorption is used to simulate equilibrium and rate-limited sorption. A random walk particle tracking (PT) model was developed and applied to analyze complex leaching characteristics. Results show that sorption parameters derived from column experiments underestimate long-term PFOA leaching in lysimeter experiments due to early depletion, suggesting that transformat

SUBMITTER: Bierbaum T 

PROVIDER: S-EPMC10724089 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature