Aging Significantly Affects Mobility and Contaminant-Mobilizing Ability of Nanoplastics in Saturated Loamy Sand

Environmental Science & Technology, Год журнала: 2019, Номер 53(10), С. 5805 - 5815

Опубликована: Апрель 23, 2019

Plastic debris, in particular, microplastics and nanoplastics, is becoming an emerging class of pollutants global concern. Aging can significantly affect the physicochemical properties plastics, therefore, may influence fate, transport, effects these materials. Here, we show that aging by UV or O3 exposure drastically enhanced mobility contaminant-mobilizing ability spherical polystyrene nanoplastics (PSNPs, 487.3 ± 18.3 nm diameter) saturated loamy sand. Extended Derjaguin–Landau–Verwey–Overbeek calculations pH-dependent transport experiments demonstrated greater aged PSNPs was mainly result surface oxidation which increased not only charge negativity, but more importantly, hydrophilicity The contributed to their elevated abilities. Moreover, binding both nonpolar polar contaminants, further increasing PSNPs. Interestingly, versus compounds via distinctly different mechanisms: contaminants (tested using pyrene) modification polymeric structure exacerbated slow desorption kinetics; for (4-nonylphenol), induced changes also resulted irreversible adsorption through interactions, such as hydrogen bonding. findings underline significant on environmental fate implications nanoplastics.

Язык: Английский

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Critical Assessment of Analytical Methods for the Harmonized and Cost-Efficient Analysis of Microplastics

Applied Spectroscopy, Год журнала: 2020, Номер 74(9), С. 1012 - 1047

Опубликована: Апрель 6, 2020

Microplastics are of major concerns for society and is currently in the focus legislators administrations. A small number measures to reduce or remove primary sources microplastics environment coming into effect. At moment, they have not yet tackled important topics such as food safety. However, recent developments 2018 bill California requesting analysis drinking water by standardized operational protocols. Administrations analytical labs facing an emerging field methods sampling, extraction, microplastics, which complicate establishment In this review, state applied identification quantification tools evaluated providing a harmonized guideline future protocols cover these types bills. The main on naked eye detection, general optical microscopy, application dye staining, flow cytometry, Fourier transform infrared spectroscopy (FT-Ir) Raman thermal degradation pyrolysis–gas chromatography–mass spectrometry (py-GC-MS) well thermo-extraction desorption gas (TED-GC-MS). Additional techniques highlighted combined suggested. An outlook given aspect nanoplastic analysis. all cases, were screened limitations, work abilities and, if possible, estimated costs summarized recommendation workflow covering demands society, legislation, administration cost efficient but still detailed manner.

Язык: Английский

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Reducing environmental plastic pollution by designing polymer materials for managed end-of-life

Nature Reviews Materials, Год журнала: 2021, Номер 7(2), С. 104 - 116

Опубликована: Окт. 11, 2021

Язык: Английский

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Effect of aging on adsorption behavior of polystyrene microplastics for pharmaceuticals: Adsorption mechanism and role of aging intermediates

Journal of Hazardous Materials, Год журнала: 2019, Номер 384, С. 121193 - 121193

Опубликована: Сен. 10, 2019

Язык: Английский

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Analysis of environmental nanoplastics: Progress and challenges

Chemical Engineering Journal, Год журнала: 2020, Номер 410, С. 128208 - 128208

Опубликована: Дек. 25, 2020

Язык: Английский

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