Deployment of a mobile platform to characterize spatial and temporal variation of on-road fine particles in an urban area
Journal
Environmental Research
Journal Volume
204
Date Issued
2022
Author(s)
Abstract
Traffic-related air pollutants (TRAPs) pose a serious health hazard for residents and commuters in urban areas. In this study, a real-time mobile monitoring system was deployed in Taipei, a typical East Asian city with an overlap of high population density, traffic, and special structures (e.g., viaducts), to capture the on-road TRAPs at different times of the day. In general, black carbon, ultrafine particles (UFPs), CO concentrations, and lung deposition surface area (LDSA) were positively correlated with traffic flow, and for PM2.5, a more independent fluctuating concentration was observed. During rush-hour periods, the mean concentrations of UFPs, PM2.5, and LDSA were 6.12 × 104 ± 3.83 × 104 cm?3, 23 ± 8 μg/m3, and 2.29 × 102 ± 1.20 × 102 μm2/cm3, respectively. Additionally, the UFP number concentration and LDSA were two times higher along the high-traffic commuting route than along the lower traffic route. Pollutants tended to accumulate at sites near viaducts and high buildings and were significantly influenced by vehicle composition. In this study, the ratio of LDSA to total particle surface area concentration was used as an indicator of the degree of particle irregularity, which was directly related to aging during transport. ? 2021
Subjects
Lung deposition surface area (LDSA)
Mobile monitoring
Spatial–temporal variation
Traffic-related air pollutant (TRAP)
Ultrafine particles (UFPs)
black carbon
carbon monoxide
monitoring system
air pollutant
air pollution
building
environmental monitoring
lung deposition surface area
motor vehicle
particle size
particulate matter 2.5
pollution control
respiratory tract parameters
spatiotemporal analysis
traffic
traffic and transport
ultrafine particulate matter
urban area
Taipei
Taiwan
Type
journal article