摘要
利用石家庄市快速路、主干道、次干道、支路共8条道路上布设的降尘缸,收集夏季道路交通扬尘并进行样品筛分、称重、粒径分析及碳分析。结果表明:(1)2.5~10.0μm粒径颗粒物含量最高,其次为10.0~30.0μm,0~2.5μm最少。相同类型道路南侧、西侧细颗粒物多,而北侧、东侧大颗粒物相对多,原因与道路两侧车流量和周围环境有关。2.5~10.0μm颗粒物更易在2.5 m处富集,而10.0~30.0μm颗粒物在1.5 m处容易富集。(2)PM_(2.5)比PM10更易富集碳。快速路PM_(2.5)中总碳(TC)、有机碳(OC)高,元素碳(EC)低。快速路和主干道2.5 m处PM10更易富集碳,次干道和支路则更易在1.5 m处富集。(3)研究区道路扬尘PM_(2.5)和PM10中碳组分的主要来源为汽油车尾气和燃煤排放,少部分为生物质燃烧。
Road dust samples were collected from different types of city paved road by dust deposition gauges in Shijiazhuang during summer,and were sieved,weighed,particle size analyzed and carbon content analyzed.Results were as follows:(1)Diameter of road dustparticles was mainly between 2.5-10.0μm,secondly between 10.0-30.0μm,few of them between 0-2.5μm.The concentration of fine particle was higher in south and west side of same type of road;while coarse particle concentration was higher in north and east side,it was due to traffic flow and surrounding environment.Comparing the particle size percentage from different types of road and different height(1.5,2.5 m),percentage content of road dust with 10.0-30.0μm in diameter from the height of 1.5 m was found higher than from 2.5 m,while particles diameter 2.5-10.0μm had high percentage content in 2.5 m.(2)The carbon content of PM_(2.5)was found higher than that of PM10.On expressway TC and OC concentration of PM_(2.5)was high and EC was low.Carbon was easier to be enriched on PM10 at a height of 2.5 m on expressway and trunk road,while it was easier to be enriched at a height of 1.5 m on secondary trunk and branch road.(3)The main sources of carbon of PM_(2.5)and PM10 in the road dust of the study area was gasoline car exhaust and coal combustion,a few was biomass burning.
作者
安塞
肖捷颖
刘娟
郭硕
赵文霞
闫伯骏
AN Sai;XIAO Jieying;LIU Juan;GUO Shuo;ZHAO Wenria;YAN Bojun(Pollution Prevention Biotechnology Laboratory of Hebei Province,School of Envi-ronmental Science and Engineering,Hebei University of Science and Technology,Shijiazhuang Hebei 050018)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2017年第9期1010-1016,共7页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.41471027)
国家环境保护部环保公益性科研专项(No.201409004)
河北省自然科学基金资助项目(No.D2015208162)
关键词
道路扬尘
颗粒物
粒径分布
碳分析
road dust
particles
size distribution
carbon analysis
