es300894r_si_001.pdf (52.61 kB)
Estimation of the Contributions of Brake Dust, Tire Wear, and Resuspension to Nonexhaust Traffic Particles Derived from Atmospheric Measurements
journal contribution
posted on 2016-02-20, 19:09 authored by Roy M. Harrison, Alan M. Jones, Johanna Gietl, Jianxin Yin, David C. GreenSize-fractionated samples of airborne particulate matter
have been
collected in a number of campaigns at Marylebone Road, London and
simultaneously at background sites either in Regents Park or at North
Kensington. Analysis of these samples has enabled size distributions
of total mass and of a number of elements to be determined, and roadside
increments attributable to nonexhaust emissions arising from traffic
activity have been calculated. Taking a novel approach, the combined
use of size distribution information and tracer elements has allowed
the separate estimation of the contributions of brake dust, tire dust,
and resuspension to particle mass in the range 0.9–11.5 μm
aerodynamic diameter and mean contributions (±s.e.) at the Marylebone
Road sampling site are estimated as resuspended dust 38.1 ± 9.7%,
brake dust 55.3 ± 7.0%, and tire dust 10.7 ± 2.3%, (accounting
for a total of 104.1% of coarse particle mass in the traffic increment
above background).