Characteristics of tyre dust in polluted air: Studies by single particle mass spectrometry (ATOFMS)

被引：82

作者：

Dall'Osto, Manuel ^{[1
,2
]}

Beddows, David C. S. ^{[2
]}

Gietl, Johanna K. ^{[2
]}

Olatunbosun, Oluremi A. ^{[3
]}

Yang, Xiaoguang ^{[3
]}

Harrison, Roy M. ^{[2
]}

机构：

[1] CSIC, Inst Ciencies Mar, E-08003 Barcelona, Spain

[2] Univ Birmingham, Sch Geog Earth & Environm Sci, Natl Ctr Atmospher Sci, Div Environm Hlth & Risk Management, Birmingham B15 2TT, W Midlands, England

[3] Univ Birmingham, Sch Mech Engn, Birmingham B15277, W Midlands, England

来源：

ATMOSPHERIC ENVIRONMENT | 2014年 / 94卷

关键词：

Tyre dust; Road surface wear; Non-exhaust emissions; Road traffic; ATOFMS; CHEMICAL-CHARACTERIZATION; ULTRAFINE PARTICLES; SIZE DISTRIBUTIONS; AIRBORNE PARTICLES; TIRE; EMISSIONS; WEAR; ATLANTIC; PAVEMENT; DEBRIS;

D O I：

10.1016/j.atmosenv.2014.05.026

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

There is a paucity of quantitative knowledge on the contributions of non-exhaust (abrasion and resuspension) sources to traffic emissions. Abrasive emissions can be broadly categorised as tyre wear, brake wear and road dust/road surface wear. Current research often considers road dust and tyre dust as externally mixed particles, the former mainly composed of mineral matter and the latter solely composed of mainly organic matter and some trace elements. The aim of this work was to characterise tyre wear from both laboratory and field studies by using Aerosol Time-Of-Flight Mass Spectrometry (ATOFMS). Real-time single particle chemical composition was obtained from a set of rubber tyres rotating on a metal surface. Bimodal particle number size distributions peaking at 35 nm and 85 nm were obtained from SMPS/APS measurements over the range 6-20,000 nm. ATOFMS mass spectra of tyre wear in the particle size range 200-3000 nm diameter show peaks due to exo-sulphur compounds, nitrate, Zn and ions of high molecular weight (m/z > 100) attributed to organic polymers. Two large ATOFMS datasets collected from a number of outdoor studies were examined. The former was constituted of 48 road dust samples collected on the roads of London. The latter consisted of ATOFMS ambient air field studies from Europe, overall composed of more than 2,000,000 single particle mass spectra. The majority (95%) of tyre wear particles present in the road dust samples and atmospheric samples are internally mixed with metals (Li, Na, Ca, Fe, Ti), as well as phosphate. It is concluded that the interaction of tyres with the road surface creates particles internally mixed from two sources: tyre rubber and road surface materials. Measurements of the tyre rubber component alone may underestimate the contribution of tyre wear to concentrations of airborne particulate matter. The results presented are especially relevant for urban aerosol source apportionment and PM2.5 exposure assessment. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：224 / 230

页数：7

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