Spatial and Spatiotemporal Modeling of Intra-Urban Ultrafine Particles: A Comparison of Linear, Nonlinear, Regularized, and Machine Learning Methods

Опубликована: Янв. 1, 2024

Язык: Английский

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Utilizing cerium as a surrogate for actinide aerosols: Real-time characterization and formation mechanisms in nuclear fire scenarios

Journal of Environmental Radioactivity, Год журнала: 2024, Номер 280, С. 107551 - 107551

Опубликована: Окт. 14, 2024

Язык: Английский

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Beyond the tailpipe: Review of non-exhaust airborne nanoparticles from road vehicles

Eco-Environment & Health, Год журнала: 2024, Номер 4(1), С. 100130 - 100130

Опубликована: Дек. 17, 2024

With the electrification of road vehicles leading to a reduction in tailpipe emissions, relative contribution non-exhaust emissions (NEEs) has become increasingly prominent. NEEs, particularly nanoparticles smaller than 100 nm aerodynamic diameter (PM0.1), present significant health and environmental risks. A comprehensive understanding strategic management these are urgently required mitigate their impact. This article reviews existing studies reveals that NEEs generated from brake tyre wear under critical temperature conditions, while resuspension do not directly produce but contribute larger particles. Common methodologies studying include laboratory experiments (with dynamometers, chassis simulators), field tests (tunnel real emission tests), source apportionments. The rate PM0.1, calculated based on particle number concentration, ranges 1.2% 98.9%, depending driving conditions. Extreme conditions result high nanoparticle generation. Emission inventories reveal PM0.1 levels have remained stable since 2020, without an observable reduction. Moreover, attributable found surpass those wear. Current mitigation strategies focus material improvements for pads tyres, better maintenance, regulatory measures. Mitigating impacts nanoscale particulate matter requires additional research regulations control it at source.

Язык: Английский

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Exhaust Emission Toxicity Assessment for Two Different Modern Gasoline Vehicle Technologies

SAE technical papers on CD-ROM/SAE technical paper series, Год журнала: 2023, Номер unknown

Опубликована: Авг. 28, 2023

<div class="section abstract"><div class="htmlview paragraph">Cellular exposure to diluted exhaust gas is a promising method assess the adverse effects of road traffic on human health. To fully understand potential correlation between emission patterns, vehicle technologies and cellular toxicity in real-world scenarios, further research needed. This study evaluates emissions from two advanced technology vehicles driving conditions. One gasoline direct injection (GDI) with particle filter (GPF), while other port fuel (PFI) hybrid without GPF. The were tested chassis dyno using Real Driving Emissions (RDE) test cycle that replicates on-road included both cold hot starting engine Human epithelial A549 cells exposed an Air Liquid Interface (ALI) system toxicity. Τhe dose during cell simulated inhalation urban environment. ALI was equipped insert points, or HEPA filters, allowing effect filtered unfiltered exhaust. Exposed subjected Alamar Blue staining lactate dehydrogenase (LDH) measurements performed. results indicate gaseous particulate are associated reduction viability all cases (3-21.1%). Furthermore, higher levels observed cold-start cycles GDI car.</div></div>

Язык: Английский

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Detection of atmospheric aerosols and terrestrial nanoparticles collected in a populous city in southern Brazil

Environmental Science and Pollution Research, Год журнала: 2023, Номер 31(3), С. 3526 - 3544

Опубликована: Дек. 12, 2023

Язык: Английский

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