{"title":"聚苯乙烯微塑料暴露在自然阳光下的光降解","authors":"Zeynep Kilinc , Gamze Yesilay , Demet Cetin , Zekiye Suludere , Suad Rashdan , Layla Hazeem , Mohamed Bououdina , George Z. Kyzas","doi":"10.1016/j.jphotochem.2025.116462","DOIUrl":null,"url":null,"abstract":"<div><div>In the present study, we investigated the photodegradation of polystyrene microplastics (PS-MPs) exposed to natural sunlight over an extended period. Changes in particle size, surface charge, morphology, and chemical structure of PS-MPs were evaluated using Dynamic Light Scattering (DLS), Zeta potential measurements, Scanning Electron Microscopy (SEM), and Raman spectroscopy. Our findings revealed that exposure to natural sunlight significantly accelerates MP degradation process, resulting in pronounced fragmentation and chemical alterations compared to samples kept in dark conditions. While degradation occurs in the dark, light enhances the process. Therefore, researchers conducting studies on the toxicity of MP should include photodegradation parameter in the environmental impact assessment of MPs. Our findings highlight the importance of photodegradation in understanding the environmental fate and impact of PS-MPs. Further research can focus on the ecological implications of these chemical changes and the interactions of degraded particles with marine biota.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"468 ","pages":"Article 116462"},"PeriodicalIF":4.1000,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Photodegradation of polystyrene microplastics exposed to natural sunlight\",\"authors\":\"Zeynep Kilinc , Gamze Yesilay , Demet Cetin , Zekiye Suludere , Suad Rashdan , Layla Hazeem , Mohamed Bououdina , George Z. Kyzas\",\"doi\":\"10.1016/j.jphotochem.2025.116462\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In the present study, we investigated the photodegradation of polystyrene microplastics (PS-MPs) exposed to natural sunlight over an extended period. Changes in particle size, surface charge, morphology, and chemical structure of PS-MPs were evaluated using Dynamic Light Scattering (DLS), Zeta potential measurements, Scanning Electron Microscopy (SEM), and Raman spectroscopy. Our findings revealed that exposure to natural sunlight significantly accelerates MP degradation process, resulting in pronounced fragmentation and chemical alterations compared to samples kept in dark conditions. While degradation occurs in the dark, light enhances the process. Therefore, researchers conducting studies on the toxicity of MP should include photodegradation parameter in the environmental impact assessment of MPs. Our findings highlight the importance of photodegradation in understanding the environmental fate and impact of PS-MPs. Further research can focus on the ecological implications of these chemical changes and the interactions of degraded particles with marine biota.</div></div>\",\"PeriodicalId\":16782,\"journal\":{\"name\":\"Journal of Photochemistry and Photobiology A-chemistry\",\"volume\":\"468 \",\"pages\":\"Article 116462\"},\"PeriodicalIF\":4.1000,\"publicationDate\":\"2025-05-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Photochemistry and Photobiology A-chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1010603025002023\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Photochemistry and Photobiology A-chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1010603025002023","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Photodegradation of polystyrene microplastics exposed to natural sunlight
In the present study, we investigated the photodegradation of polystyrene microplastics (PS-MPs) exposed to natural sunlight over an extended period. Changes in particle size, surface charge, morphology, and chemical structure of PS-MPs were evaluated using Dynamic Light Scattering (DLS), Zeta potential measurements, Scanning Electron Microscopy (SEM), and Raman spectroscopy. Our findings revealed that exposure to natural sunlight significantly accelerates MP degradation process, resulting in pronounced fragmentation and chemical alterations compared to samples kept in dark conditions. While degradation occurs in the dark, light enhances the process. Therefore, researchers conducting studies on the toxicity of MP should include photodegradation parameter in the environmental impact assessment of MPs. Our findings highlight the importance of photodegradation in understanding the environmental fate and impact of PS-MPs. Further research can focus on the ecological implications of these chemical changes and the interactions of degraded particles with marine biota.
期刊介绍:
JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds.
All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor).
The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.