Exposure characteristics of ultrafine particles on urban streets and its impact on pedestrians

He, Ruhan; Qiu, Zhaowen

doi:10.1007/s10661-022-10453-6

Cited by 6 publications

(1 citation statement)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Road measurements of PNC are variable temporally and spatially as they are subject to road conditions and traffic behaviour, such as acceleration [ 29 ]. In measurements in Xi’an, China, the variation in roadside ultrafine particle concentration was affected by traffic volume and the meteorology [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Particle Number Concentration Measurements on Public Transport in Bangkok, Thailand

Matthews

Chompoobut

Navasumrit

et al. 2023

IJERPH

View full text Add to dashboard Cite

Traffic is a major source of particulate pollution in large cities, and particulate matter (PM) level in Bangkok often exceeds the World Health Organisation limits. While PM2.5 and PM10 are both measured in Bangkok regularly, the sub-micron range of PM, of specific interest in regard to possible adverse health effects, is very limited. In the study, particle number concentration (PNC) was measured on public transport in Bangkok. A travel route through Bangkok using the state railway, the mass rapid transport underground system, the Bangkok Mass Transit System (BTS) Skytrain and public buses on the road network, with walking routes between, was taken whilst measuring particle levels with a hand-held concentration particle counter. The route was repeated 19 times covering different seasons during either morning or evening rush hours. The highest particle concentrations were found on the state railway, followed by the bus, the BTS Skytrain and the MRT underground with measured peaks of 350,000, 330,000, 33,000 and 9000 cm−3, respectively, though particle numbers over 100,000 cm−3 may be an underestimation due to undercounting in the instrument. Inside each form of public transport, particle numbers would peak when stopping to collect passengers (doors opening) and decay with a half-life between 2 and 3 min. There was a weak correlation between particle concentration on bus, train and BTS and Skytrain with carbon monoxide concentration, as measured at a fixed location in the city.

show abstract

Section: Introductionmentioning

confidence: 99%