Characterization of microplastic-derived dissolved organic matter in freshwater : Effects of light irradiation and polymer types
Copyright © 2024 The Author(s). Published by Elsevier Ltd.. All rights reserved..
This study investigated the impacts of light irradiation and polymer types on the leaching behavior of dissolved organic matter (DOM) from microplastics (MPs) in freshwater. Polypropylene had the highest leaching capacity of DOM after photoaging, followed by polystyrene (PS), polyamide (PA) and polyethylene terephthalate (PET). While similarly low levels of DOM were observed in the remaining 5 MP suspensions under UV irradiation and in almost all MP suspensions (except PA) under darkness. These suggest that the photooxidation of some buoyant plastics may influence the carbon cycling of nature waters. Among 9 MP-derived leachates, PET leachates had the highest chromophoric DOM concentration and aromaticity, probably owing to the special benzene rings and carbonyl groups in PET structures and its fast degradation rate. Protein-like substances were the primary fluorescent DOM in MP suspensions (except PS), especially in darkness no other fluorescent substances were found. Considering the bio-labile properties of proteins together, MPs regardless of floating or suspended in an aquatic environment may have prevalent long-term effects on microbial activities. Besides, from monomers to hexamers with newly formed chemical bonds were identified in UV-irradiated MP suspensions. These results will contribute to a deep insight into the potential ecological effects related to MP degradation.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:185 |
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| Enthalten in: |
Environment international - 185(2024) vom: 25. März, Seite 108536 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Chen, Chunzhao [VerfasserIn] |
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| Links: |
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| Themen: |
Composition |
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| Anmerkungen: |
Date Completed 26.03.2024 Date Revised 26.03.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.envint.2024.108536 |
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| funding: |
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| PPN (Katalog-ID): |
NLM369609808 |
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| 520 | |a Copyright © 2024 The Author(s). Published by Elsevier Ltd.. All rights reserved. | ||
| 520 | |a This study investigated the impacts of light irradiation and polymer types on the leaching behavior of dissolved organic matter (DOM) from microplastics (MPs) in freshwater. Polypropylene had the highest leaching capacity of DOM after photoaging, followed by polystyrene (PS), polyamide (PA) and polyethylene terephthalate (PET). While similarly low levels of DOM were observed in the remaining 5 MP suspensions under UV irradiation and in almost all MP suspensions (except PA) under darkness. These suggest that the photooxidation of some buoyant plastics may influence the carbon cycling of nature waters. Among 9 MP-derived leachates, PET leachates had the highest chromophoric DOM concentration and aromaticity, probably owing to the special benzene rings and carbonyl groups in PET structures and its fast degradation rate. Protein-like substances were the primary fluorescent DOM in MP suspensions (except PS), especially in darkness no other fluorescent substances were found. Considering the bio-labile properties of proteins together, MPs regardless of floating or suspended in an aquatic environment may have prevalent long-term effects on microbial activities. Besides, from monomers to hexamers with newly formed chemical bonds were identified in UV-irradiated MP suspensions. These results will contribute to a deep insight into the potential ecological effects related to MP degradation | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Composition | |
| 650 | 4 | |a Degradation | |
| 650 | 4 | |a Dissolved organic matter | |
| 650 | 4 | |a Fluorescence properties | |
| 650 | 4 | |a Microplastics | |
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| 650 | 7 | |a Microplastics |2 NLM | |
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| 700 | 1 | |a Li, Fei |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Zhiguo |e verfasserin |4 aut | |
| 700 | 1 | |a Yu, Gang |e verfasserin |4 aut | |
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