Environmental Pollution, Год журнала: 2024, Номер unknown, С. 125434 - 125434
Опубликована: Ноя. 1, 2024
Язык: Английский
Journal of Hazardous Materials, Год журнала: 2024, Номер 466, С. 133440 - 133440
Опубликована: Янв. 6, 2024
An experimental study was conducted on how polymer density affects the transport and fate of microplastics in aquatic flows. For first time, polypropylene (PP), polyethylene (PE), polymethyl methacrylate (PMMA), polyetheretherketone (PEEK), polyvinyl chloride (PVC) were chemically stained tested using solute techniques velocities found among rivers natural environment (0.016 – 0.361 m/s). The movement 3D-polymers with densities ranging from 0.9 1.4 g/cm³ quantified a laboratory flume scaled to simulate open-channel flows fluvial systems. Except for PP, most conditions exhibited similar characteristics solutes regardless established models successfully implemented predict their fate. Mass recoveries ADE routing model demonstrated microplastic deposition resuspension associated below critical velocity thresholds ≤ 0.1 m/s. When becomes dominant force at these slower velocities, concentrations denser than water will be momentarily or permanently deposited channel beds follow classical Shields sediment methodology. This data is provide suspension based river density, making key contribution research predicting organismal exposure. Microplastics are emerging contaminants that ubiquitous Given size, have increased bioavailability all organisms can exposed through direct ingestion, indirect ingestion via prey items, respiration. act as pathway disease-carrying pathogens many questions remain toxicity. Microplastic systems unknown thereby which experience aims reduce knowledge gap currently particle properties affect flows, ultimately help remediate impact environment.
Язык: Английский
Процитировано
38
Journal of Environmental Management, Год журнала: 2024, Номер 354, С. 120314 - 120314
Опубликована: Фев. 23, 2024
Язык: Английский
Процитировано
10
Chemical Engineering Journal, Год журнала: 2024, Номер 496, С. 153718 - 153718
Опубликована: Июль 6, 2024
Microplastics, particularly those in the 5–20 µm range, pose substantial risks aquatic environments, yet effective removal techniques are limited. This study assesses two critical geometric parameters of a 10 mm mini-hydrocyclone: inlet radius and insertion angle. Along with velocity, they optimised collectively to enhance MPs' removal. Computational Fluid Dynamics (CFD) simulations using Mixture model Reynolds stress were employed track particle–water–air interactions, revealing flow dynamics absence an air core. The Response Surface Methodology (RSM) Box-Behnken design experiments was adopted assess impact operational determine optimal design. Recovery efficiency, concentration split rate recorded during compared CFD results, showing good agreement between simulations. resulting novel achieved 88.53% MPs recovery efficiency 1.83, which represents obvious improvement over commercial design's 79.97% 1.68. Simulations reveal that shortens path for through forced turbulence region modifies velocity fields, enhancing gradient within mini-hydrocyclone's chamber. Moreover, exhibits more robust response variations, crucial advantage its application arrays. Experiments further confirm matrix composed mini-hydrocyclones achieves percentage points higher than mini-hydrocyclones. These findings mark significant step towards MP removal, addressing environmental issue.
Язык: Английский
Процитировано
9
The Science of The Total Environment, Год журнала: 2024, Номер 954, С. 176620 - 176620
Опубликована: Окт. 1, 2024
Язык: Английский
Процитировано
8
Journal of Environmental Management, Год журнала: 2024, Номер 354, С. 120324 - 120324
Опубликована: Фев. 15, 2024
Язык: Английский
Процитировано
5
Journal of Environmental Management, Год журнала: 2024, Номер 360, С. 121117 - 121117
Опубликована: Май 10, 2024
Язык: Английский
Процитировано
5
Journal of Environmental Management, Год журнала: 2023, Номер 351, С. 119806 - 119806
Опубликована: Дек. 19, 2023
Язык: Английский
Процитировано
10
Water, Год журнала: 2025, Номер 17(4), С. 588 - 588
Опубликована: Фев. 18, 2025
Quantitatively analyzing the factors influencing horizontal migration of microplastics (MPs) in water bodies and understanding their movement patterns are crucial for explaining predicting transport principles final destinations. This study used nearly spherical polyethylene (PE), polypropylene (PP), polystyrene (PS) MPs as experimental subjects. By tracking motion characteristics through video recording, we established relationships among Reynolds number (Re), MP density, floating velocity. The results showed that Re density jointly affect drift MPs. velocity significantly increases with increase shows a power function growth trend. difference mainly affects dispersion during process. Moreover, coefficient variation (CV) PP’s increased Re, suggesting is more random discrete than PE PS. Ultimately, fitted to equation comprehensively evaluate relationship between velocity, analysis underscores predominantly influences water, while chiefly impacts nature motion.
Язык: Английский
Процитировано
0
Physics and Chemistry of the Earth Parts A/B/C, Год журнала: 2025, Номер unknown, С. 103942 - 103942
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Journal of Environmental Management, Год журнала: 2025, Номер 382, С. 125415 - 125415
Опубликована: Апрель 15, 2025
Язык: Английский
Процитировано
0