Academic Journal
Quantifying turbulence-burst-induced PFASs release across the sediment-water interface: 3D coupled computation of the boundary layer zone.
| Τίτλος: | Quantifying turbulence-burst-induced PFASs release across the sediment-water interface: 3D coupled computation of the boundary layer zone. |
|---|---|
| Συγγραφείς: | Guo P; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China., Hua Z; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China; Yangtze Institute of Conservation and Development, Hohai University, Nanjing, 210098, China. Electronic address: zulinhua@hhu.edu.cn., Wang P; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China. Electronic address: hhwp@hhu.edu.cn., Yu L; Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technologies, Jiangsu Key Laboratory of Atmospheric Environmental Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China. |
| Πηγή: | Water research [Water Res] 2026 Oct 15; Vol. 305, pp. 126490. Date of Electronic Publication: 2026 Jul 13. |
| Τύπος έκδοσης: | Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: Pergamon Press Country of Publication: England NLM ID: 0105072 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-2448 (Electronic) Linking ISSN: 00431354 NLM ISO Abbreviation: Water Res Subsets: MEDLINE |
| Imprint Name(s): | Original Publication: Oxford, Pergamon Press. |
| Ιατρικοί όροι (MeSH): | Geologic Sediments*/chemistry , Water Pollutants, Chemical*/chemistry, Water/chemistry ; Hydrodynamics ; Models, Theoretical ; Water Movements ; Computer Simulation |
| Περίληψη: | Turbulence bursting induced by hydrodynamic forcing within the boundary layer is a dominant driver of PFASs release and transport. Existing models rarely account for the vortex structures generated during bursting events, leading to incomplete quantification of burst-driven release processes. To address this gap, a coupled numerical model was developed to simulate PFASs release from sediments under turbulence-burst forcing, including PFASs transport through pore water, and subsequent transfer across the sediment-water interface into the overlying water. The model employs a Detached Eddy Simulation approach to resolve boundary-layer vortex structures and incorporates a hydrodynamic effect factor to enhance PFASs release responsiveness. Velocity threshold, determined by comparing release depths, was used to define the effective range. By jointly resolving the overlying water and pore water domains, the model provides a more accurate characterisation of boundary-layer processes. The simulations reproduce pore-water PFASs gradients and align with measured residual sediment concentrations (R² = 0.84). The model captures the relationship between PFASs release and vortex intensity under three flow situations. Notably, short-chain PFASs exhibit greater downward penetration under high-intensity vortical structures. Localised high-concentration enrichment zones were observed within the sediments under weak vortex-driven conditions. The results demonstrate that vortex evolution during turbulence bursting significantly influences PFASs release dynamics. This model provides a valuable framework for understanding the micro-scale processes governing PFASs release at the sediment-water interface. (Copyright © 2026 Elsevier Ltd. All rights reserved.) |
| Competing Interests: | Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. |
| Contributed Indexing: | Keywords: Computational fluid dynamics (CFD); Per- and Polyfluoroalkyl Substances (PFASs); Sediment−water interface; Turbulence-Burst; sediment |
| Substance Nomenclature: | 059QF0KO0R (Water) 0 (Water Pollutants, Chemical) |
| Entry Date(s): | Date Created: 20260716 Date Completed: 20260909 Latest Revision: 20260909 |
| Update Code: | 20260909 |
| DOI: | 10.1016/j.watres.2026.126490 |
| PMID: | 42462652 |
| Βάση Δεδομένων: | MEDLINE |
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