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Electrokinetic Separation of Microplastics Using a Hybrid Dielectrophoresis-Bipolar Electrode Microchannel.

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Τίτλος: Electrokinetic Separation of Microplastics Using a Hybrid Dielectrophoresis-Bipolar Electrode Microchannel.
Συγγραφείς: Sun Z; School of Mechanical Engineering, Hebei University of Technology, Tianjin, China., Zhang F; School of Mechanical Engineering, Hebei University of Technology, Tianjin, China., Zhu G; School of Mechanical Engineering, Hebei University of Technology, Tianjin, China., Yu C; School of Mechanical Engineering, Hebei University of Technology, Tianjin, China., Ma C; School of Mechanical Engineering, Hebei University of Technology, Tianjin, China.
Πηγή: Electrophoresis [Electrophoresis] 2026 Oct; Vol. 47 (10), pp. 1022-1039. Date of Electronic Publication: 2026 Aug 13.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Wiley-VCH Country of Publication: Germany NLM ID: 8204476 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1522-2683 (Electronic) Linking ISSN: 01730835 NLM ISO Abbreviation: Electrophoresis Subsets: MEDLINE
Imprint Name(s): Publication: : Weinheim : Wiley-VCH
Original Publication: [Weinheim, Germany] : Verlag Chemie, [1980-
Ιατρικοί όροι (MeSH): Electrophoresis*/instrumentation , Electrophoresis*/methods , Microfluidic Analytical Techniques*/instrumentation , Microfluidic Analytical Techniques*/methods , Microplastics*/isolation & purification , Microplastics*/analysis , Microplastics*/chemistry, Electrodes ; Electroosmosis ; Equipment Design ; Particle Size
Περίληψη: The environmental persistence of microplastic particles has raised increasing concerns for both human health and ecological systems. Owing to their intrinsic electrical properties and broad size distribution, electrokinetic-based microfluidic separation techniques have attracted increasing attention. In this study, a hybrid dielectrophoresis-bipolar electrode (DEP-BPE) microchannel is proposed to enhance particle separation across multiple size scales. A multiphysics numerical model coupled with particle tracking is developed to investigate the coupled electrokinetic mechanisms governing particle transport, including dielectrophoretic (DEP) force, electrophoretic migration, and electroosmotic flow (EOF)-induced hydrodynamic drag. The results show that increasing the applied voltage amplifies electrokinetic forces and significantly improves removal efficiency. However, the separation performance exhibits a non-monotonic dependence on voltage, arising from the competition between lateral DEP displacement and axial transport driven by electrophoresis and EOF. An optimal voltage condition is identified, under which trajectory differentiation is maximized without over deflection. Electrode spacing is found to primarily regulate the spatial distribution of electrokinetic interactions, exerting a limited influence on overall separation strength but significantly affecting the location of particle deflection and trajectory evolution. These findings demonstrate that particle separation in the DEP-BPE microchannel is governed by the coupling between force magnitude and spatial distribution and highlight the effectiveness of integrating DEP-induced stratification with BPE-driven trajectory divergence. This work provides mechanistic insights and design guidelines for high-efficiency microfluidic separation of polydisperse microplastic particles.
(© 2026 Wiley‐VCH GmbH.)
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Grant Information: A2025202025 Natural Science Foundation of Hebei Province
Contributed Indexing: Keywords: bipolar electrode; dielectrophoresis; electrokinetic separation; microfluidic particle sorting
Substance Nomenclature: 0 (Microplastics)
Entry Date(s): Date Created: 20260813 Date Completed: 20261016 Latest Revision: 20261016
Update Code: 20261016
DOI: 10.1002/elps.70139
PMID: 42592689
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1522-2683
DOI:10.1002/elps.70139