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广州市街道环境PM_(10)和PM_(2.5)质量浓度的变化特征
引用本文:李龙凤,王新明,赵利容,何秋生,盛国英,傅家谟.广州市街道环境PM_(10)和PM_(2.5)质量浓度的变化特征[J].地球与环境,2005,33(2):57-60.
作者姓名:李龙凤  王新明  赵利容  何秋生  盛国英  傅家谟
作者单位:1. 中国科学院广州地球化学研究所有机地球化学国家重点实验室,广东,广州,510640;中国科学院研究生院,北京,100039
2. 中国科学院广州地球化学研究所有机地球化学国家重点实验室,广东,广州,510640
摘    要:采用直读式DustTrak8520型颗粒物浓度测定仪在2003年7月至2004年6月期间对广州市街道PM10、PM2.5进行了初步测定,结果表明PM10、PM2.5质量浓度季节变化幅度较大,并且它们的变化趋势相似。与国内很多城市不同,PM10、PM2.5质量浓度日变化都呈上午低、下午高、夜间21点左右出现峰值的特征。PM10、PM2.5两者之间存在显著的相关性,相关系数r=0.98。PM2.5/PM10平均值为0.85,表明广州市街道空气中细颗子(PM2.5)在可吸入颗粒物中占很大比重。

关 键 词:可吸入颗粒物  细粒子  空气污染  城区环境
文章编号:1672-9250(2005)02-0057-04
修稿时间:2005年1月24日

VARIATIONS OF PM10 AND PM2.5 LEVELS IN STREET MICROENVIRONMENT IN GUANGZHOU
LI Long-feng,WANG Xin-ming,ZHAO Li-rong,HE Qiu-sheng,SHENG Guo-ying,FU Jia-mo.VARIATIONS OF PM10 AND PM2.5 LEVELS IN STREET MICROENVIRONMENT IN GUANGZHOU[J].Earth and Environment,2005,33(2):57-60.
Authors:LI Long-feng  WANG Xin-ming  ZHAO Li-rong  HE Qiu-sheng  SHENG Guo-ying  FU Jia-mo
Abstract:With a portable direct-reading Model 8520 DustTrak analyzer, street-level PM_(10) and PM_(2.5) mass concentrations were measured in urban Guangzhou from July 2003 to June 2004. In the study period PM_(10) and PM_(2.5) both exhibited a wide seasonal variation and similar seasonal trends. Unlike those in other cities in China, PM_(10) and PM_(2.5) in Guangzhou had a diurnal pattern with lower concentrations in the morning, higher values in the afternoon and peak values at about 21:00 in the evening. PM_(10) and PM_(2.5) were well correlated (r=0.98), and the ratio of PM_(2.5) to PM_(10) averaged 0.85, indicating that the fine particles (PM_(2.5)) shared a much larger fraction in respirable suspended particulates on Guangzhou streets.
Keywords:respirable suspended particulate  fine particle  air pollution  urban environment
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