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题名: Pollution characteristics and source apportionment of PM2.5in Lanzhou City
其他题名: 兰州城区大气PM_2.5污染特征及来源解析
作者: Wang, Xin; Nie, Yan; Chen, Hong; Wang, Bo; Huang, Tao; Xia, Dun-Sheng
收录类别: EI ; CSCD
出版日期: 2016-05-15
刊名: 环境科学
卷号: 37, 期号:5, 页码:1619-1628
期刊主办单位: 中国科学院生态环境研究中心
出版者: SCIENCE CHINA PRESS
出版地: BEIJING
中文摘要: 为探究兰州城区PM_2.5的污染特征及其来源,分别在兰州市城关区和西固区设置PM_2.5采样点,于2013年10月(非采暖期)和12月(采暖期)采集样品并进行分析,得到了PM_2.5及其16种化学组成的质量浓度. 结果表明,兰州城区PM_2.5污染水平较高,平均质量浓度为129 μg·m~(-3). 样品无机元素平均质量浓度为:S>Ca>Fe>Al>Mg>Pb>Zn>Mn>Ti>Cu,其中S、 Ca、 Fe、 Al的质量浓度在1 μg·m~(-3)以上,是主要元素组分; 样品各无机元素质量浓度表现为采暖期高于非采暖期,城关区高于西固区. 样品水溶性离子平均质量浓度为:SO_4~(2-)>NO_3~->NH_4~+>Cl~->K~+>Na~+,其中SO_4~(2-)、 NO_3~-、 NH_4~+的质量浓度在10 μg·m~(-3)以上,是主要离子组分; 样品各水溶性离子质量浓度表现为采暖期高于非采暖期,西固区高于城关区. 富集因子(EF)分析结果表明,元素Al、 Ca、 Mg、 Ti的EF值均小于1以自然来源为主; 元素Cu、 Pb、 S、 Zn的EF值显著大于10,表明这4种元素在PM_2.5中高度富集,且主要源于人为活动造成的污染. 主成分分析结果表明,交通排放源、 生物质燃烧源、 土壤源和二次粒子对兰州城区大气PM_2.5贡献显著.
英文摘要: In order to understand the characteristics and sources of PM2.5pollutant in Lanzhou City, two PM2.5sampling sites were set up in Chengguan district and Xigu district, respectively. Samples were sampled during October (non-heating period) and December (heating period) 2013, and mass concentrations of PM2.5and its 16 kinds of chemical components were analyzed. The results showed that the average mass concentration of PM2.5during the sampling period was 129 μg·m-3. The sequence of mass concentrations of inorganic elements was: S>Ca>Fe>Al>Mg>Pb>Zn>Mn>Ti>Cu, while the mass concentrations of S, Ca, Fe, and Al, which were the major element compositions, exceeded 1 μg·m-3. The mass concentration of inorganic elements during heating period was higher than that during non-heating period, meanwhile, the mass concentration in Chengguan district was higher than that in Xigu district. The sequence of mass concentrations of water-soluble ions was: SO42->NO3->NH4+>Cl->K+>Na+, while the mass concentrations of SO42-, NO3-, NH4+, which were the main ion components, exceeded 10 μg·m-3. The mass concentration of water-soluble ions during heating period was higher than that during non-heating period, meanwhile, the mass concentration in Xigu district was higher than that in Chengguan district. The result of enrichment factor (EF) analysis showed that the EF values of Al, Ca, Mg and Ti were lower than 1, indicating the contribution of natural source, while the EF values of Cu, Pb, S and Zn were higher than 10, indicating the contribution of anthropogenic pollution. The result of principal component analysis showed that the sources of PM2.5were mainly derived from traffic emission, biomass burning, soil and secondary particles. © 2016, Science Press. All right reserved.
关键词: 兰州 ; PM_2.5 ; 污染特征 ; 富集因子 ; 主成分分析
作者部门: (1) Key Laboratory of Western China's Environmental Systems, College of Earth and Environment Science, Lanzhou University, Lanzhou ; 730000, China ; (2) Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou ; 730000, China ; (3) College of Earth and Environment Science, Lanzhou University, Lanzhou ; 730000, China
通讯作者: Xia, Dun-Sheng (dsxia@lzu.edu.cn)
学科分类: Mathematical Statistics
文章类型: Article
所属项目编号: 中央高校基本科研业务费专项
所属项目名称: 中央高校基本科研业务费专项资金
项目资助者: LZU
语种: 中文
DOI: 10.13227/j.hjkx.2016.05.004
ISSN号: 0250-3301
CSCD记录号: CSCD:5701357
EI记录号: 20162202440169
IR记录号: 20162202440169
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/182310
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Wang, Xin,Nie, Yan,Chen, Hong,et al. Pollution characteristics and source apportionment of PM2.5in Lanzhou City[J]. Huanjing Kexue/Environmental Science,2016,37(5):1619-1628.
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