A5081646502- Vehicle emissions and performance
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Energy, Environment, and Transportation Policies
- Asphalt Pavement Performance Evaluation
- Environmental Impact and Sustainability
- Advanced Combustion Engine Technologies
- Electric Vehicles and Infrastructure
- Atmospheric chemistry and aerosols
- Microplastics and Plastic Pollution
- Toxic Organic Pollutants Impact
- Heavy metals in environment
- Engineering Applied Research
- Analytical chemistry methods development
- Occupational exposure and asthma
- Transportation Planning and Optimization
- Urban Transport and Accessibility
- Infrastructure Maintenance and Monitoring
- Recycling and Waste Management Techniques
- Maritime Transport Emissions and Efficiency
- Energy and Environment Impacts
Imperial College London
2022-2024
Air pollution problems persist in many cities throughout the world, despite drastic reductions regulated emissions of criteria pollutants from vehicles when tested on standardised driving cycles. New vehicle regulations European Union and United States require use OBD portable measurement systems (PEMS) to confirm meet specified limits during on-road operation. The resultant in-use testing will yield a large amount PEMS data across range vehicles. If used properly, availability could enable...
The purpose of this study was to identify a characteristic elemental tyre fingerprint that can be utilised in atmospheric source apportionment calculations. Currently zinc is widely used as single element tracer quantify wear, however several authors have highlighted issues with approach. To overcome this, rubber tread digested and has been analysed for 25 elements by ICP-MS generate multielement profile. Additionally, estimate the percentage made up inert fillers, thermogravimetric analysis...
The transportation sector plays a vital role in enabling the movement of people, goods, and services, but it is also major contributor to energy consumption greenhouse gas emissions. Accurate modeling fuel pollutant emissions critical for effective management environmental sustainability. This study investigates use real-world driving data from gasoline diesel vehicles model exhaust (CO2 NOx). models were developed using ensemble bagged decision tree algorithms with inputs derived both...
Non-exhaust emissions are becoming of increasing significance with respect to total particulate matter (PM) concentrations in ambient air. Of particular interest is the metal content this PM since metallic compounds well known have toxic effects on human health and environment. In study, 'bottom-up' annual tyre wear emission rates were estimated compared top-down' declared by UK; it was calculated that between 14 25 tonnes Zn entered atmosphere PM10 2020. The using a cost-effective, simple...
Abstract The environmental effects of airborne micro‐ and nano‐size plastic particles are poorly understood. Microscopy chemical analyses atmospherically deposited on snow surfaces at high elevation (2,865–3,690 m) in the Upper Colorado River basin (UCRB; Rocky Mountains) revealed presence black substances intimately associated with microplastic fibers, interpreted to have originated as tire matter. Identical similar occur shredded tires road‐surface samples. substance responsible for color...
Travellers may be exposed to a wide range of different air pollutants during their journeys. In this study, personal exposures within vehicles and active travel were tested in real-world conditions across nine transport modes on journeys from London Paddington Oxford City Centre, the United Kingdom. The covered cycling, walking, buses, coaches, trains private cars. Such are relevant questions traveller comfort safety context airborne diseases such as COVID-19 growing awareness health,...
The Euro 7 exhaust emissions regulation will be important both from the perspective of how it further improves air quality, but also certain greenhouse gas and economics internal combustion engine. This paper sets out ongoing importance ozone to urban tailpipe volatile organic compound (VOC) contribute that as well having direct human health effects through inhalation. then a novel method for measurement speciated VOCs nitrous oxide (N 2 O) at in real-world conditions, presents initial...
Real-world testing of a set modern vehicles show that most petrols meet their Euro standards for nitrous oxides (NO ), while diesel exceed them. However, some met implies exceedances are not peculiar to the fuel. Likewise, compliance tested petrol with standard does mean all do. Engine maps were synthesized which reproduced trip level emissions within 10% gathered under real-world driving conditions. Average velocity alone, such as what is used in COPERT, poor predictor emissions. Stepwise...
Abstract The UK national atmospheric emissions inventory estimates of construction industry use a top-down approach, based on fuel consumption and employment. It that the sector is 2nd largest emitter PM 2.5 (14%) 4th NO X (7%). In this study, we have adopted bottom-up approach to assess from show are 39% higher than existing estimates. By developing novel fleet turnover model predict population emission standard machinery up 2025, demonstrate significant shift in quantity types machines...
The purpose of this study was to identify a characteristic elemental tyre fingerprint that can be utilised in atmospheric source apportionment calculations. Currently zinc is widely used as single element tracer quantify wear, however several authors have highlighted issues with approach. To overcome this, rubber tread digested and has been analysed for 25 elements by ICP-MS generate multielement profile. Additionally, estimate the percentage made up inert fillers, thermogravimetric analysis...