Related Experiment Video
Updated: Apr 25, 2026
10:16
Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis
Published on: December 16, 2016
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Advancing understanding of microplastics-derived dissolved organic matter release: From source-dependent behavior to
Huan Tang1, Yue Yin1, Chendou Zhou1
1Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Water Research
|April 23, 2026
Summary
Microplastic aging releases dissolved organic matter (DOM), with source history significantly impacting DOM composition and release. Environmental conditions like salinity further influence these microplastic-derived DOM release behaviors.
Area of Science:
- Environmental Science
- Polymer Chemistry
- Environmental Chemistry
Background:
- Microplastics (MPs) aging releases dissolved organic matter (DOM), raising environmental concerns.
- Understanding source-dependent release of MPs-DOM from environmentally relevant MPs is crucial but poorly understood.
Purpose of the Study:
- To comparatively investigate MPs-DOM release from river-collected versus newly purchased plastics (PET and PS) under UV aging.
- To elucidate the influence of prior environmental exposure and salinity on MPs-DOM characteristics and release.
Main Methods:
- UV-induced aging of polyethylene terephthalate (PET) and expandable polystyrene (PS) MPs.
- Chemical characterization of released MPs-DOM.
- Molecular dynamics simulations to model DOM release mechanisms.
Main Results:
- River-collected MPs showed higher aging degrees, while newly purchased MPs released more DOM.
- Aging consistently increased MPs-DOM oxygenation, aromaticity, and complexity.
- Newly purchased MPs released more high-molecular-weight, aromatic DOM; river-collected MPs released more oxidized DOM.
- Salinity amplified source-dependent DOM release differences.
Conclusions:
- Plastic source history and environmental conditions strongly control MPs-DOM release.
- Prior environmental exposure significantly alters MPs aging and DOM release characteristics.
- Molecular dynamics simulations provide insights into DOM release mechanisms and environmental fate.
Keywords:
Microplastic derived dissolved organic matterMicroscopic release processMolecular dynamic simulationRiver-collected plastic productsMore Related Videos
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