Polycyclic aromatic hydrocarbons, elemental and organic carbon emissions from tire-wear

• Published in: The Science of the total environment Vol. 408; no. 20; pp. 4563 - 4568
• Main Authors: Aatmeeyata, Sharma, Mukesh
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15-09-2010; [Amsterdam; New York]: Elsevier Science; Elsevier
• Subjects: Air Pollutants - analysis; Air Pollutants - chemistry; Applied sciences; Atmospheric pollution; Automotive components; Carbon; Carbon - analysis; Carbon - chemistry; Elemental carbon; Emission; Emission analysis; Emission factors; Environmental Monitoring; Exact sciences and technology; Exhaust emission; Motor Vehicles; Organic carbon; Particle Size; Pollutants; Pollution; Pollution sources. Measurement results; Polyallylamine hydrochloride; Polycyclic aromatic hydrocarbon; Polycyclic Aromatic Hydrocarbons - analysis; Polycyclic Aromatic Hydrocarbons - chemistry; Roads; Simulation; Tire-wear; Transports; Emission factors; Elemental carbon; Organic carbon; Tire-wear; Polycyclic aromatic hydrocarbon; Carbonaceous materials; Hydrocarbon; Highway; Emission content; Motor vehicle; Polycyclic aromatic compound; Mutagen; Persistent organic pollutant; Tyre; Carcinogen; Gas chromatography; Particle size distribution; Wear; Air pollution; Road traffic; Mass spectrometry; Organic compounds
• ISSN: 0048-9697; 1879-1026
• DOI: 10.1016/j.scitotenv.2010.06.011

Tire-wear is an important source of PAHs, elemental carbon (EC) and organic carbon (OC). The emissions of these pollutants have been studied in an experimental set-up, simulating a realistic road–tire interaction (summer tire–concrete road). The large particle non-exhaust emissions (LPNE; diameter greater than 10
μm) have been evaluated over 14,500
km run of the tire. An increasing linear trend with cumulative km run was observed for emissions of PAHs and carbon. Amongst PAHs in LPNE, pyrene has been observed to be the highest (30
±
4
mg
kg
−
1
) followed by benzo[ghi]perylene (17
±
2
mg
kg
−
1
). Different fractions of EC–OC for tire-wear have been analyzed, and unlike exhaust emissions, EC1 was observed to be 99% of EC whereas more than 70% of the OC was the high temperature carbon (OC3 and OC4). The overall emission factors (mass
tire
−
1
km
−
1
) for PAHs, EC and OC from tire-wear are 378
ng
tire
−
1
km
−
1
, 1.46
mg
tire
−
1
km
−
1
and 2.37
mg
tire
−
1
km
−
1
for small cars.