Fluorescence Signatures of Dissolved Organic Matter Leached from Microplastics: Polymers and Additives
Abstract
Despite the numerous studies that have investigated the occurrence and fate of plastic particles in the environment, only a limited effort has been devoted toward exploring the characteristics of dissolved organic matter (DOM) leached from microplastics. In this study, using excitation emission matrix-parallel factor analysis (EEM-PARAFAC), we explored the fluorescence signatures of plastic-derived DOM from commonly used plastic materials, which included two polymers (polyvinyl chloride (PVC) and polystyrene (PS)), two additives (diethylhexyl phthalate (DEHP) and bisphenol A (BPA)), and two commercial plastics. The exposure of the selected plastics to UV light facilitated the leaching of DOM measured in terms of dissolved organic carbon and fluorescence intensity. Four fluorescent components were identified, which included three protein/phenol-like components (C1, C3, and C4) and one humic-like component (C2). The C1 and C4 components were highly correlated with the amounts of DOM leached from DEHP and BPA, respectively, under both leaching conditions, while both C2 and C4 presented good correlations with the DOM leached from polymers under UV light. The C4 may serve as a good fluorescence proxy for DOM leached from BPA or BPA-containing plastics. This study highlights the overlooked issue of plastic-derived DOM leaching into the aquatic environment through optical characterization.
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Literature reports on photooxidation rates are scarce and challenging to compare because of differences in experimental setups with respect to polymer types/geometry, and UV source characteristics.
“However, literature reports on photooxidation rates are scarce and challenging to compare because of differences in the experimental setups with respect to polymer types/geometry, and UV source characteristics.[29][30][31]110,111”
From The fate of plastic in the ocean environment – a minireview (2021) · cites this paper as [110]
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- Authors
- Lee, Y. K., Murphy, K. R., & Hur, J.
- Affiliations
- Sejong University (KR)
- Chalmers University of Technology (SE)
- Corresponding author
- Hur, Jin
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2020-08-27
- Volume
- 54
- Issue
- 19
- Pages
- 11905-11914
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W3082446973
- Cited by
- 380
- References
- 44
- Citations by year
- 2026: 69 · 2025: 84 · 2024: 79 · 2023: 60 · 2022: 53 · 2021: 33 · 2020: 2
- FWCI
- 9.12
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Environmental Science & Technology (publishedVersion)
- PubMed (publishedVersion)
- Chalmers Research (Chalmers University of Technology) (submittedVersion)
- Funders
- National Research Foundation of Korea (2020R1A2C2007248)
- Topics
- Physical Sciences › Environmental Science › Pollution › Microplastics and Plastic Pollution
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
- Keywords
- microplastics, dissolved organic matter, polyvinyl chloride, polystyrene, DEHP, bisphenol A, polymer additives, humic-like components, aquatic ecosystem pollution
- MeSH terms
- Microplastics, Factor Analysis, Statistical, Humic Substances, Plastics, Polymers, Spectrometry, Fluorescence
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