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August 16, 2026Environmental Science & Technology

Interfacial Enrichmentof Microplastics at MicrodropletAir–Water Interface Facilitates Photoaging

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Authors

YSYi ShenJMJiamin MengCZChao Zhu

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Overview

Experimental study demonstrates enhanced microplastic photoaging and dissolved organic matter release in microdroplets, indicating accelerated plastic breakdown in natural aerosols.

Key Points

  • To investigate the mechanism by which the air–water interface of microdroplets regulates the photoaging and degradation of microplastics compared to bulk water systems.
  • Evaluated photoaging and surface functional group evolution of polystyrene (PS), polyethylene terephthalate (PET), and polycaprolactone (PCL) in microdroplets versus bulk systems.
  • Measured reactive oxygen species generation, electric field effects, and molecular properties of microplastic-derived dissolved organic matter over 96 hours.
  • Microdroplet systems elevated microplastic-derived dissolved organic matter release by 2.60–3.35 times relative to bulk systems, reaching 248.26 mg C/L compared to 74.17 mg C/L at 96 h.
  • Interfacial microplastic enrichment coupled with strong electric fields sustained elevated steady-state concentrations of reactive oxygen species, dominated by hydroxyl radicals.
  • Polystyrene-derived dissolved organic matter displayed higher aromaticity, oxidation, and electron-accepting capacity in microdroplets, sustaining a self-amplifying radical cycle.

Cite This Study

Shen et al. (2026) studied this question.

synapsesocial.com/papers/6a817a11f2fb91fc834ada87https://doi.org/10.1021/acs.est.6c11130
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Insights into the Photoaging Behavior of Microplastics: Environmental Fate and Ecological Risk2025 · 56 citations
  2. 2Molecular Weights of Dissolved Organic Matter Significantly Affect Photoaging of Microplastics2024 · 64 citations
  3. 3Comprehensive Understanding on the Aging Process and Mechanism of Microplastics in the Sediment–Water Interface: Untangling the Role of Photoaging and Biodegradation2024 · 62 citations
  4. 4Microplastic-Derived Dissolved Organic Matter: Environmental Chemistry and Ecological Consequences2026
  5. 5Hydrophilic Fraction of Dissolved Organic Matter Largely Facilitated Microplastics Photoaging: Insights from Redox Properties and Reactive Oxygen Species2024 · 25 citations