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Optimization of metal polymer friction pair composition for hydrogen wear reduction through thermal stabilization analysis.
Sci Rep
January 2025
Department of CSE, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India.
The composition of the metal-polymer friction pair is carefully considered for interacting with water and hydrogen, ensuring the metals electrode process potential remains below waters in a neutral medium. Simultaneously, adherence to defined chemical composition ratios for the metal-polymer materials is crucial. This analysis is conducted under conditions of thermal stabilization, characterized by a minimal temperature gradient across the rim thickness within an equivalent thermal field.
View Article and Find Full Text PDFDirect measurement of brake wear particles from a light-duty vehicle under real-world driving conditions.
Environ Sci Pollut Res Int
January 2025
Research Centre for Energy, Environment and Technology (CIEMAT), Avda. Complutense, 40, 28040, Madrid, Spain.
As tailpipe emissions have decreased, there is a growing focus on the relative contribution of non-exhaust sources of vehicle emissions. Addressing these emissions is key to better evaluating and reducing vehicles' impact on air quality and public health. Tailoring solutions for different non-exhaust sources, including brake emissions, is essential for achieving sustainable mobility.
View Article and Find Full Text PDFSize-fractionated carbonaceous and iron-rich particulate matter in urban environments of France and Senegal.
Environ Sci Pollut Res Int
January 2025
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, USP, São Paulo, Brazil.
Road traffic is one of the main sources of particulate matter in the urban environment, emitting particulate organic and elemental carbon compounds and metal-rich particles through combustion and brakes and tires wear. In Western Africa, the carbon and metal composition of airborne particles is also influenced by additional sources linked to biomass combustion and recent industrialization. Here, we investigated the impact of combustion-related and non-combustion-related emissions on the distribution of carbonaceous fractions and iron-rich particles in two urban environments in France and Senegal.
View Article and Find Full Text PDFComprehensive elemental and physical characterization of vehicle brake wear emissions from two different brake pads following the Global Technical Regulation methodology.
J Hazard Mater
January 2025
University of the Bundeswehr Munich, Faculty for Mechanical Engineering, Institute of Chemistry and Environmental Engineering, Werner-Heisenberg-Weg 39, 85577 Neubiberg, Germany; Joint Mass Spectrometry Center at Comprehensive Molecular Analytics (CMA), Environmental Health Center, Helmholtz Munich, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany. Electronic address:
Non-exhaust emissions have gained increasing attention during the last years, with the upcoming EURO 7 regulation defining maximum PM emission factors for tire and brake emissions for the first time. This study, therefore, focusses on broadening the knowledge on chemical composition and physical characteristics of brake dust to define emission factors for heavy metal and organic pollutants. Particles from two pads were analyzed utilizing the Worldwide Harmonised Light Vehicle Test Procedure (WLTP) brake cycle.
View Article and Find Full Text PDFHigh Magnetic Property and Toxicity of Particulate Matter Generated during Welding and Cutting Processes.
Environ Health (Wash)
June 2024
Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
Article Synopsis
- Magnetic particulate matter (PM) in the air is concerning due to its health impacts, but there’s still limited understanding of its sources and toxic effects.
- Research shows that PM from welding and cutting processes has significantly stronger magnetic properties and is more toxic compared to PM from other sources like iron plants and brake wear.
- This PM is found to be more neurovirulent and likely to cause oxidative stress, indicating a need for better safety measures for workers involved in these processes to minimize health risks.
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