Abstract： Fine particulate matter PM2.5 samples around three typical kinds of urban traffic roads in Hangzhou were collected from 2010 to 2011, 22 types of elements in which were determined by ICP-MS and ICP-AES preparing with microwave digestion. Exposure characteristics, variation regularity and origin of those elements in PM2.5were discussed. The results show that the contents of 22 types of elements have little relationship with the type of roads. The contents are small in summer and large in other three seasons. The pollution elements are Zn, Pb, Cu and Ni. The contents of inorganic elements in PM2.5 are small while the contents of organic ones are large. The soil elements, such as Fe, K, Mg, Na, P and Si, come from the dust caused by vehicle passing by. The elements, such as Pb, Zn, Cu and Cd, are caused by the same human source. Motor vehicle exhaust results in the heavy metals pollution of soil and dust around urban traffic roads mostly. The enrichment factor of Pb in PM2.5 keeps high in recent years along with the rapid increasing of motor vehicles amount.

Keywords: urban roads; vehicle exhaust; fine particulate matter PM2.5; element component

中图分类号：X513         文献标志码：A

文章编号：1008-5548(2015)02-0016-05

DOI:10.13732/j.issn.1008-5548.2015.02.004

收稿日期：2014-04-11， 修回日期：2014-04-24，在线出版时间：2015-04-17。

基金项目：杭州市科技计划发展项目，编号：20091133B15；杭州市环境保护科研计划项目，编号：2011006。

第一作者简介：姚琳（1978—），女，硕士，高级工程师，研究方向为环境监测与科学。 电话：0571-87998257，E-mail: sunningsmile@163.com。