摘要
对典型道路扬尘进行采样,分析夏季北京市西城区、海淀区、门头沟区不同类型道路积尘负荷和PM2.5粒度乘数(K2.5,g/(km·辆)),并对高峰与非高峰期K2.5进行统计分析,通过计算得到了PM2.5、PM10排放因子和排放强度。结果表明:除北营房中街和阜外大街以外的积尘负荷总体表现为支路>次干道>主干道>快速路,门头沟区>海淀区>西城区。不同道路类型PM10排放因子表现为主干道>次干道>支路>快速路(西城区除外),PM10排放强度表现为快速路>主干道>次干道>支路。K2.5的分析结果表明,K2.5表现为快速路>主干道>次干道>支路,西城区>海淀区>门头沟区,高峰期K2.5普遍比非高峰期大,其中午高峰最大。此外,北营房中街积尘负荷为0.681g/m^2,PM10排放因子和排放强度分别为1.04g/(km·辆)和8.43kg/(km·d),明显小于其他区支路;阜外大街积尘负荷为0.724g/m^2,PM10排放因子和排放强度分别为1.28g/(km·辆)和44.74kg/(km·d),明显小于其他区主干道;这可能与两条道路的日平均洒水次数较多有关。研究结果可为北京市道路扬尘排放清单的构建提供数据参考。
The dust load and PM2.5 particle size multiplier(K2.5,g/(km·vehicle))of different types of roads in Xicheng District,Haidian District and Mentougou District of Beijing in summer were analyzed by sampling typical road dust.The peak and off-peak K2.5 were statistically analyzed.The PM2.5 and PM10 emission factors and emission intensity were calculated.The results showed that the total dust load(except for Beiyingfang Middle Street and Fuwai Street)was as follows:branch road>secondary road>main road>expressway,Mentougou District>Haidian District>Xicheng District.The order of PM10 emission factors of different road types was main road>secondary road>branch road>expressway(exclude Xicheng District),and the order of PM10 emission intensity was expressway>main road>secondary road>branch road.The order of K2.5 was expressway>main road>secondary road>branch road,Xicheng District>Haidian District>Mentougou District.K2.5 was generally larger during peak period than that during off-peak period,and the maximum value was obtained during noon peak period.In addition,the dust load on the Beiyingfang Middle Street was 0.681 g/m^2,the emission factor and emission intensity of PM10 were1.04 g/(km·vehicle)and 8.43 kg/(km·d),respectively,which were significantly lower than those on the branch roads in other districts.The dust load on Fuwai Street was 0.724 g/m^2,the emission factors and intensity of PM10 were 1.28 g/(km·vehicle)and 44.74 kg/(km·d),respectively,which were significantly lower than those on the main roads in other districts.It might be related to the more average daily watering times of the two roads.The research results could provide data reference for the construction of road dust emission inventory in Beijing.
作者
潘研
邢敏
侯亚峰
李珊珊
PAN Yan;XING Min;HOU Yafeng;LI Shanshan(College of Resource Environment and Tourism,Capital Normal University,Beijing 100048;Beijing Municipal Research Institute of Environmental Protection,Beijing 100037)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2020年第8期975-979,984,共6页
Environmental Pollution & Control
基金
国家重点研发计划项目(No.2016YFC0207904、No.2016YFC0207903)
北京市自然科学基金资助项目(No.8202024)。
关键词
道路扬尘
积尘负荷
粒度乘数
排放特征
road dust
dust load
particle size multiplier
emission characteristic
