Microplastic aging processes: Environmental relevance and analytical implications

TrAC Trends in Analytical Chemistry, Год журнала: 2024, Номер 172, С. 117566 - 117566

Опубликована: Янв. 30, 2024

The analysis of microplastics (MPs) in terrestrial environments and the evaluation their environmental risk has gained great attention, owing to increasing evidence for widespread presence soils freshwater sediments globally. Once environment, MPs undergo abiotic biotic processes which alter properties integrity: this process is called "aging" implications fate these contaminants, morphology surface chemistry. Aging may also affect analytical assessment samples: samples likely contain aged MPs, while methods are generally established using pristine plastics validation. This can lead uncertainties quantification characterization. critical review summarizes current trends simulation characterization MP aging laboratory conditions, highlighting limitations knowledge gaps. It discusses challenges induced by samples, providing directions toward possible solutions.

Язык: Английский

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Colonization characteristics and surface effects of microplastic biofilms: Implications for environmental behavior of typical pollutants

The Science of The Total Environment, Год журнала: 2024, Номер 937, С. 173141 - 173141

Опубликована: Май 16, 2024

Язык: Английский

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Plastics in the environment in the context of UV radiation, climate change and the Montreal Protocol: UNEP Environmental Effects Assessment Panel, Update 2023

Photochemical & Photobiological Sciences, Год журнала: 2024, Номер 23(4), С. 629 - 650

Опубликована: Март 21, 2024

Abstract This Assessment Update by the Environmental Effects Panel (EEAP) of United Nations Environment Programme (UNEP) considers interactive effects solar UV radiation, global warming, and other weathering factors on plastics. The illustrates significance radiation in decreasing durability plastic materials, degradation debris, formation micro- nanoplastic particles accompanying leaching potential toxic compounds. Micro- nanoplastics have been found all ecosystems, atmosphere, humans. While biological risks are not yet well-established, widespread increasing occurrence pollution is reason for continuing research monitoring. Plastic debris persists after its intended life soils, water bodies atmosphere as well living organisms. To counteract accumulation plastics environment, lifetime novel or alternatives should better match functional products, with eventual breakdown releasing harmless substances to environment.

Язык: Английский

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Interactive impacts of photoaged micro(nano)plastics and co-occurring chemicals in the environment

The Science of The Total Environment, Год журнала: 2024, Номер 927, С. 172213 - 172213

Опубликована: Апрель 4, 2024

Язык: Английский

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Natural aging and adsorption/desorption behaviors of polyethylene mulch films: Roles of film types and exposure patterns

Journal of Hazardous Materials, Год журнала: 2024, Номер 466, С. 133588 - 133588

Опубликована: Янв. 23, 2024

Язык: Английский

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Comprehensive understanding of the aging and biodegradation of polystyrene-based plastics

Environmental Pollution, Год журнала: 2023, Номер 342, С. 123034 - 123034

Опубликована: Ноя. 26, 2023

Язык: Английский

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A Multilevel Risk Assessment Framework for Nanoplastics in Aquatic Ecosystems

Water, Год журнала: 2025, Номер 17(2), С. 180 - 180

Опубликована: Янв. 10, 2025

To date, the assessment of risks related to nanoplastics (NPLs) has been incipient. Attempts establish safety levels support decisions regarding restrictions on use or reuse materials derived from petrochemicals are critical, but complexity datasets makes it difficult communicate potential NPLs-related environmental risks. Therefore, seems essential reduce relevant data a factor/number that easier clarify whether there is risk and, above all, easily report information legislators so prohibition, reductions, and/or readjustments monitoring programs can be implemented accordingly. Accordingly, this study aimed propose an improved and tiered for NPLs following NORMAN network, which may outlined as follows: (i) conducting screenings assess level through deterministic methodologies (involving collection effective concentrations or, in their absence, no-effect lowest-effect concentrations, also known NOEC LOEC, respectively); (ii) comparing exceedance values obtained previously relation predicted non-environmental (PNECs); (iii) ranking different NPL types based prioritization indeces facilitate future decision-making. Of total six polymers available, was only possible deliver indices three (two freshwater one saltwater) due lack PNEC (PECs). The majority research topic focused PS. PS classified high-priority polymer, since its estimated index ≥65 (the base value 1). Furthermore, freshwater, PE indicated priority polymer (with exceeding 1000). It should noted other widely used (such PMMA PVC), insufficient data. therefore clear current management control measures products containing must reconsidered NPLs’ impacts.

Язык: Английский

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Environment changes everything. How relevant are laboratory studies of sorption of pollutants on microplastics? A critical review

Journal of environmental chemical engineering, Год журнала: 2025, Номер 13(2), С. 115655 - 115655

Опубликована: Янв. 29, 2025

Язык: Английский

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Adsorption behavior of levofloxacin hydrochloride on non‐degradable microplastics aging with H₂O₂

Water Environment Research, Год журнала: 2025, Номер 97(2)

Опубликована: Фев. 1, 2025

Abstract Plastics pollutants, especially microplastics (MPs, <5 mm in diameter) and levofloxacin hydrochloride (Lev‐HCl) often co‐exist the aquatic environment. To explore adsorption processes mechanisms of Lev‐HCl by non‐degradable MPs, this study, H 2 O oxidation was used to age polyvinyl chloride (PVC), polystyrene (PS), polyethylene terephthalate (PET) MPs. The results demonstrated that equilibrium capacity increased significantly after aging, as ‐PET (1.167 mg/g) > PET (0.995 mg/g), ‐PS (1.057 PS (0.957 ‐PVC (1.107 PVC (0.975 mg/g). After hydrogen bond (‐OH) more obvious, π‐π interactions were enhanced. These MPs mainly adsorbed micropore filling (contributions: 65.9%, 56%, 63.5%). current study highlights potential act a vector for environment, aging. Practitioner Points Adsorption behavior onto three elucidated. aging PVC, PS, bonding ‐aged significant. Multi‐layer on non‐homogeneous surfaces via revealed.

Язык: Английский

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Environmental degradation and fragmentation of microplastics: dependence on polymer type, humidity, UV dose and temperature

Microplastics and Nanoplastics, Год журнала: 2025, Номер 5(1)

Опубликована: Март 5, 2025

Abstract Depending on the environmental compartment, plastics are subjected to various stressors, including UV light, water, microbial exudates (enzymes), and temperature. Among these, stress from photo-chemical processes was identified as a leading exposure pathway of plastics, e.g., in atmosphere or water surface. While focus earlier studies mainly deterioration chemical mechanical properties, more recent demonstrate how photo-oxidation leads fragmentation release secondary micro- nanoplastic fragments, well low-molecular weight species. These tend single condition limited number polymer types. Therefore, this study focuses systematically evaluating influence temperature relative humidity during simulated degradation five types pristine microplastic powders: polypropylene, low density polyethylene, polyamide 6, high impact polystyrene thermoplastic polyurethane. We quantified dose-dependent water-soluble organics, nanoplastics (including their particle size distributions) found that identity dictated type quantity species released rather than aging protocol. With systematic assessment generated data can be used mechanistic models determine rates fragment distributions.

Язык: Английский

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