[1]程 燕,樊巍巍,刘随心,等.西安市PM2.5 和碳气溶胶质量浓度变化特征研究[J].西安建筑科技大学学报:自然科学版,2014,46(06):888-893.[doi:10.15986/j.1006-7930.2014.06.022]
 CHENG Yan,FAN Weiwei,LIU Suixin,et al.Characteristics of PM2.5 and carbonaceous aerosols in Xi’an[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2014,46(06):888-893.[doi:10.15986/j.1006-7930.2014.06.022]
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西安市PM2.5 和碳气溶胶质量浓度变化特征研究()
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西安建筑科技大学学报:自然科学版[ISSN:1006-7930/CN:61-1295/TU]

卷:
46
期数:
2014年06期
页码:
888-893
栏目:
出版日期:
2014-12-31

文章信息/Info

Title:
Characteristics of PM2.5 and carbonaceous aerosols in Xi’an
文章编号:
1006-7930(2014)06-0888-06
作者:
程 燕1樊巍巍1刘随心2肖 波3郭伟1 李文武1王 妮1
(1. 西安交通大学人居环境与建筑工程学院,陕西 西安 710049;2. 中国科学院地球环境研究所,陕西 西安 710075;3. 西安市气象局,陕西 西安 710016)
Author(s):
CHENG Yan1 FAN Weiwei1 LIU Suixin2 XIAO Bo3 GUO Wei1 LI Wenwu1 WANG Ni1
(1. School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China; 2. Institute of Earth Environment, Chinese Academy of Science, Xi’an 710075, China; 3. Xi’an Meteorological Bureau, Xi’an 710016, China)
关键词:
西安PM2.5有机碳(OC)元素碳(EC)
Keywords:
Xi’an PM2.5 organic carbon (OC) elemental carbon (EC)
分类号:
X13
DOI:
10.15986/j.1006-7930.2014.06.022
文献标志码:
A
摘要:
为了探讨西安市PM2.5 和碳气溶胶质量浓度变化特征,从2012 年3 月~2013 年2 月对西安市大气 PM2.5 进行了为期一年的观测,并分析了有机碳(OC)和元素碳(EC)的质量浓度变化特征.结果显示,西安市2012 年3 月~2013 年2 月日均PM2.5 质量浓度变化幅度为26.9 ~505.1 μg/m3, PM2.5 年平均质量浓度为 114.0±86.6 μg/m3,是中国PM2.5 空气质量标准(GB 3095-2012)年平均二级标准值 (35 μg/m3) 的3.3 倍.PM2.5 季节变化特征为冬季 > 秋季 > 春季 > 夏季.OC 和EC 年平均浓度值为21.44±15.76 μg/m3 和6.16±3.38 μg/m3,OC/EC 年平均值为3.37±0.95,变化范围为1.80~5.84,表明有二次有机碳气溶胶的存在.主成分分析法表明,西安市大气中的碳气溶胶主要来自汽油车和柴油车尾气、二次碳气溶胶以及生物质燃烧.
Abstract:
Daily PM2.5, organic carbon (OC), and elemental carbon (EC) were measured during 2012.3﹣2013.2 to study the temporal variations of PM2.5 and carbonaceous aerosols. PM2.5 showed a fluctuation from 26.9 to 505.1 μg/m3 during the sampling period. The annual average PM2.5 mass concentration was 114.0±86.6 μg/m3, exceeding the Chinese air quality standard (GB 3095-2012) for PM2.5 (35 μg/m3) by a factor of 3.3. The seasonal patterns ranked in descending order as follows, winter>autumn>spring>summer. The average concentrations for OC and EC were 21.44±15.76 and 6.16±3.38 μg/m3. OC/EC ratios ranged from 1.80 to 5.84, with the average being 3.37±0.95, suggesting the presence of secondary organic aerosols in atmosphere. Results of principal component analysis showed that major sources of carbonaceous aerosols include gasoline- and diesel-fueled vehicles, secondary aerosols and biomass burning.

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备注/Memo

备注/Memo:
收稿日期:2014-06-18   修改稿日期:2014-12-02
基金项目:国家自然科学青年基金项目(21107084)
作者简介:程燕(1977-),女,博士,副教授,主要从事大气化学与全球环境变化的研究. E-mail: chengyan@mail.xjtu.edu.cn
更新日期/Last Update: 2015-09-01