引用本文:
董小艳, 王琼, 杨一兵, 刘彤, 王秦, 吴亚西, 方建龙. 2017年春节期间北京市城区和郊区大气PM2.5及其中多环芳烃的污染特征[J]. 环境化学, 2018, 37(10): 2191-2198
DONG Xiaoyan, WANG Qiong, YANG Yibing, LIU Tong, WANG Qin, WU Yaxi, FANG Jianlong. Characterization of ambient PM2.5 and PAHs during 2017 Spring Festival in urban and suburb areas of Beijing[J]. Environmental Chemistry, 2018, 37(10): 2191-2198

2017年春节期间北京市城区和郊区大气PM2.5及其中多环芳烃的污染特征
董小艳1, 王琼1, 杨一兵1, 刘彤2, 王秦1, 吴亚西1, 方建龙1
1. 中国疾病预防控制中心环境与健康相关产品安全所, 北京, 100021;
2. 哈尔滨市疾病预防控制中心, 哈尔滨, 150000
摘要:
为研究2017年春节期间北京市城区和郊区大气PM2.5及负载多环芳烃(PAHs)的污染水平和污染特征,分别在北京城区和郊区各选一个监测点,采集大气中的PM2.5,采用重量法和超声提取-GC/MS对滤膜上的PM2.5及多环芳烃的浓度进行测定.结果表明,春节期间城郊两地的大气PM2.5和PAHs均呈多峰分布,PM2.5均值分别为104.5 μg·m-3和104.6 μg·m-3,无显著性差异;两地PAHs均值差异具有统计学意义(P=0.001).除夕日(CSFE)烟花集中燃放时段PM2.5在城郊两地的日均浓度较前一日非集中燃放日均有明显升高.春节期间PAHs组成以4环和5环为主,二者之和占PAHs总量的80%以上,特征比值法显示城区污染主要来自燃煤和交通尾气的混合源,郊区燃煤占主导.
关键词:    春节    烟花爆竹    PM2.5    PAHs    污染特征    北京   
Characterization of ambient PM2.5 and PAHs during 2017 Spring Festival in urban and suburb areas of Beijing
DONG Xiaoyan1, WANG Qiong1, YANG Yibing1, LIU Tong2, WANG Qin1, WU Yaxi1, FANG Jianlong1
1. National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, 100021, China;
2. Harbin Center for Disease Control and Prevention, Harbin, 150000, China
Abstract:
To investigate the impact of playing fireworks on PM2.5 and polycyclic aromatic hydrocarbons(PAHs),daily PM2.5 samples were collected around 2017 Chinese Spring Festival(CSF) holidays both in urban and suburb areas of Beijing. Gravimetric method and ultrasonic-chromatography/mass spectrometry(U-GC/MS) were conducted to analyze the concentrations of PM2.5 and PAHs respectively. The results showed that PM2.5 and PAHs presented multi-peak distribution across the whole sampling period at both sampling sites. Tfhe average daily concentrations of PM2.5 were 104.5 μg·m-3 and 104.6 μg·m-3 in urban and suburb, respectively, which showed no significant difference. The total concentration of PAHs in suburb area was much higher than that in urban area. The daily concentrations of PM2.5 and total PAHs on Chinese Spring Festival Eve (CSFE) increased significantly compared with those before CSFE in both areas. The 4-ring and 5-ring PAHs were the most abundant species, contributing more than 80% of the total PAHs. Diagnostic ratios indicated that coal combustion and traffic emission were the main sources of PM2.5 associated PAHs in urban area, and coal combustion played a more important role in suburb area.
Key words:    the Spring Festival    fireworks    PM2.5    PAHs    characterization    Beijing   
收稿日期: 2017-12-25
基金项目: 公益性行业科研专项(201402022)资助.
吴亚西,E-mail:wuyaxi88@sina.com;方建龙,E-mail:fjl19800411@163.com
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