Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 115461 - 115461
Опубликована: Янв. 1, 2025
Язык: Английский
Environment & Health, Год журнала: 2025, Номер unknown
Опубликована: Янв. 14, 2025
The release of micro/nanoplastics (MNPs) from biodegradable plastics in gastrointestinal environments due to photoaging, along with their associated mechanisms and potential cytotoxicity, is largely unknown. Here, we show that poly(lactic acid)/poly(butylene adipate-co-terephthalate) (PLA/PBAT) films undergo ultraviolet resulting increased surface roughness a higher quantity MNPs on the surface. This aging process involves generation carbon- oxygen-centered free radicals, chain scission, formation oxidation products hydroxyl carbonyl groups. These can be released under water shear force, significantly increasing normalized mass loss aged approximately 0.128 mg/cm2 (18 times than unaged water). In environment, further increases about 0.196 (28 higher), likely enzymatic digestion ion-swelling effects. MNPs, primarily composed PLA, are smaller carry more negative charges conditions. THP-1 cell model, these affect viability dose-dependent manner. obtained through ultrafiltration, compared those collected via centrifugation, display broader size distribution induce pronounced toxicity cells, an EC50 243 mg/L. Preliminary comparative analysis indicates PLA/PBAT-derived present risks comparable to, or greater than, conventional plastic MNPs. findings underscore hazards plastics.
Язык: Английский
Процитировано
2
Industrial Crops and Products, Год журнала: 2025, Номер 225, С. 120510 - 120510
Опубликована: Янв. 13, 2025
Язык: Английский
Процитировано
2
Processes, Год журнала: 2024, Номер 12(4), С. 635 - 635
Опубликована: Март 22, 2024
The aging processes of microplastics (MPs) are prevalent in natural environments. Understanding the mechanisms MPs is crucial for assessing their environmental behavior and potential risks. In this study, we selected polylactic acid (PLA) polyethylene (PE) as representatives biodegradable conventional plastics, respectively, to examine changes physicochemical properties induced by water UV light exposure. Laboratory resulted significant fragmentation, characterized cracks pores on surfaces, both types MPs, with PLA exhibiting more severe changes, particularly under combined Notably, tended become progressively smaller after aging, whereas PE did not show size changes. Chemical analyses aged using micro-Fourier-transform infrared spectroscopy (FTIR) X-ray photoelectron (XPS) revealed a substantial increase carbonyl index (CI) oxygen content PE, suggesting surface oxidation during photo-oxidation. Conversely, displayed CI decrease, along an increase, indicating breakdown ester linkages formation other products. Furthermore, developed optimized pyrolysis–gas chromatography–mass spectrometry (Py–GC–MS) methods identify chemical degradation products PLA, considering differing thermal stabilities. We observed distinct trend regarding peaks chromatogram identified typical crosslinking PLA. Additionally, process, exhibited organic carbon content, eluate containing submicron/nano-sized particles. This study provides scientific foundation deeper understanding various regards effects irradiation
Язык: Английский
Процитировано
9
Materials Today Sustainability, Год журнала: 2024, Номер unknown, С. 101067 - 101067
Опубликована: Дек. 1, 2024
Язык: Английский
Процитировано
8
Agronomy, Год журнала: 2025, Номер 15(2), С. 419 - 419
Опубликована: Фев. 7, 2025
The use of plastic agricultural mulching films presents a “double-edged sword”: while these enhance crop yields, they also lead to the accumulation film residues in soil, creating new pollutants (microplastics). Our understanding “plastisphere”, niche formed by where unique microbial communities and soil conditions converge remains limited. This is particularly true for protists, which are recognized as key determinants health. Therefore, this study simulated field experiment analyze effects long-term on structure protist rhizosphere, bulk plastisphere oilseed rape well their nutrients. results revealed that residual underwent significant structural chemical degradations. Protist diversity co-occurrence network complexity were markedly reduced soils. In addition, moisture content, inorganic nitrogen available phosphorus levels declined, leading deficiencies Functional shifts consumer protists phototrophs along with weakened interactions, have been identified drivers impaired nutrient turnover. underscores critical role maintaining cycling highlights profound adverse ecosystems. These findings provide valuable insights into mitigating residue preserve fertility ensure sustainable productivity.
Язык: Английский
Процитировано
1
The Science of The Total Environment, Год журнала: 2023, Номер 870, С. 161990 - 161990
Опубликована: Фев. 2, 2023
Язык: Английский
Процитировано
16
Journal of Environmental Management, Год журнала: 2023, Номер 349, С. 119561 - 119561
Опубликована: Ноя. 17, 2023
Язык: Английский
Процитировано
15
The Science of The Total Environment, Год журнала: 2023, Номер 912, С. 169453 - 169453
Опубликована: Дек. 21, 2023
Язык: Английский
Процитировано
14
Environmental Geochemistry and Health, Год журнала: 2024, Номер 46(5)
Опубликована: Апрель 9, 2024
Язык: Английский
Процитировано
5
International Journal of Biological Macromolecules, Год журнала: 2023, Номер 255, С. 127921 - 127921
Опубликована: Ноя. 7, 2023
Язык: Английский
Процитировано
10