Effects of microplastic aging on the adsorption and desorption of trihalophenolic disinfection by-products in drinking water distribution systems.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Effects of microplastic aging on the adsorption and desorption of trihalophenolic disinfection by-products in drinking water distribution systems.
Συγγραφείς: Peng Z; School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China., Chu X; School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China. Electronic address: xianxian_chu@tju.edu.cn., Zhao W; School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China., Liu J; School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China., He N; School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China., Guo H; The Institute of Seawater Desalination and Multipurpose Utilization, Tianjin 300192, China., Zheng B; School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China., Tian Y; School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China. Electronic address: tym@tju.edu.cn.
Πηγή: Journal of hazardous materials [J Hazard Mater] 2026 Sep 01; Vol. 515, pp. 143007. Date of Electronic Publication: 2026 Jul 17.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 9422688 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-3336 (Electronic) Linking ISSN: 03043894 NLM ISO Abbreviation: J Hazard Mater Subsets: MEDLINE
Imprint Name(s): Original Publication: Amsterdam : Elsevier
Ιατρικοί όροι (MeSH): Microplastics*/chemistry , Microplastics*/radiation effects , Water Pollutants, Chemical*/chemistry , Chlorophenols*/chemistry , Phenols*/chemistry , Disinfectants*/chemistry , Drinking Water*, Water Purification/methods ; Chlorine Compounds/chemistry ; Adsorption ; Disinfection ; Ultraviolet Rays ; Water Supply ; Molecular Dynamics Simulation
Περίληψη: Microplastics (MPs) and disinfection by-products (DBPs) commonly coexist in drinking water distribution systems (DWDSs), raising concerns regarding MP-mediated DBP migration. This study investigated the adsorption and desorption of typical halogenated phenolic DBPs, namely 2,4,6-trichlorophenol (TCP) and 2,4,6-tribromophenol (TBP), on pristine and aged polyamide microplastics (PAMPs), with aging induced by UV irradiation and ClO2 oxidation. Molecular dynamics simulations were employed to elucidate the adsorption mechanisms. Additionally, TCP adsorption on colloidal polystyrene microplastics (CPMPs) in the presence of pipe scales was examined to assess the role of pipe scales in regulating TCP migration in DWDSs. Findings demonstrated that the adsorption of TCP and TBP on PAMPs was primarily driven by van der Waals interactions, with contributions from hydrophobic, electrostatic, and hydrogen bonding interactions. UV aging at 254 nm significantly increased the O/C ratio, elevated carbonyl indices, and reduced the hydrophobicity of PAMPs compared with UV aging at 340 nm, resulting in decreased adsorption. ClO2 oxidation enhanced the adsorption by increasing electrostatic interactions between PAMPs and TCP/TBP. Aging elevated DBP desorption by 5.10%-29.43% (TCP) and 2.47%-10.10% (TBP), and TCP exhibited weaker desorption hysteresis than TBP. CPMPs acted as important carriers of TCP in DWDSs, while pipe scales functioned as effective sinks by adsorbing TCP-loaded CPMPs, thereby reducing TCP migration. Overall, this study elucidates how the aging of MPs alters the fate of DBPs and highlights the role of pipe scales in regulating the fate of DBPs in DWDSs, providing important insights for the risk assessment and control of MPs and DBPs.
(Copyright © 2026 Elsevier B.V. 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: Aging; Disinfection by-products; Drinking water distribution systems; Interfacial interactions; Microplastics
Substance Nomenclature: 0 (Drinking Water)
0 (Microplastics)
0 (Water Pollutants, Chemical)
0 (Chlorophenols)
MHS8C5BAUZ (2,4,6-trichlorophenol)
YS6K3EU393 (2,4,6-tribromophenol)
0 (Phenols)
0 (Chlorine Compounds)
0 (Disinfectants)
Entry Date(s): Date Created: 20260720 Date Completed: 20260820 Latest Revision: 20260820
Update Code: 20260820
DOI: 10.1016/j.jhazmat.2026.143007
PMID: 42475823
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1873-3336
DOI:10.1016/j.jhazmat.2026.143007