Study on the pollution characteristics of fine components of tire wear particles
To clarify the pollution characteristics of tire wear particles(TWPs)from vehicles and more detailed data for composition profile of ambient particle matter sources,10 typical tires in Chinese markets were chosen for TWPs sampling using a tire durability test platform.22 inorganic elements,10 water-soluble ions,organic carbon(OC)and elemental carbon(EC)were analyzed.Results showed that the most abundant composition was carbon component,which were mainly derived from tire tread particles.The average mass fractions of OC and EC were 44.0％and 9.3％,respectively.The average OC/EC was 4.9,indicating that OC might come from secondary sources.The average mass fraction of inorganic elements was 9.3％,and Si and Zn were the most abundant,with average mass fractions of 7.4％and 0.9％,respectively.The average mass fraction of water-soluble ions was 3.4％,among which SO42-and NH4 had the highest mass fractions in anions and cations,respectively.The content of OC,EC,inorganic elements and water-soluble ions in TWPs produced by all-season tires were higher than that produced by winter tires.The content of OC,Si and Al in TWPs increased with the lifting of tire speed grade significantly.
NETL
NSTL
万方数据
