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北京一次混合型重污染过程大气颗粒物元素组分分析

郑子龙 张 凯 陈义珍 周 静 柯馨姝 周 瑞 于 跃

郑子龙, 张 凯, 陈义珍, 周 静, 柯馨姝, 周 瑞, 于 跃. 北京一次混合型重污染过程大气颗粒物元素组分分析[J]. 环境科学研究, 2014, 27(11): 1219-1226.
引用本文: 郑子龙, 张 凯, 陈义珍, 周 静, 柯馨姝, 周 瑞, 于 跃. 北京一次混合型重污染过程大气颗粒物元素组分分析[J]. 环境科学研究, 2014, 27(11): 1219-1226.
ZHENG Zi-long, ZHANG Kai, CHEN Yi-zhen, ZHOU Jing, KE Xin-shu, ZHOU Rui, YU Yue. Study on Elements in Aerosols during a Mixed Serious Pollution Episode in Beijing[J]. Research of Environmental Sciences, 2014, 27(11): 1219-1226.
Citation: ZHENG Zi-long, ZHANG Kai, CHEN Yi-zhen, ZHOU Jing, KE Xin-shu, ZHOU Rui, YU Yue. Study on Elements in Aerosols during a Mixed Serious Pollution Episode in Beijing[J]. Research of Environmental Sciences, 2014, 27(11): 1219-1226.

北京一次混合型重污染过程大气颗粒物元素组分分析

基金项目: 国家环境保护公益性行业科研专项(201109005);国家自然科学基金项目(41205093)

Study on Elements in Aerosols during a Mixed Serious Pollution Episode in Beijing

  • 摘要: 针对北京2013年1月的一次混合型大气重污染过程,于2012年12月31日—2013年1月18日在中国环境科学研究院大气环境研究所楼顶采集了TSP和PM10样品,分析了其中的元素组分. 结果表明,逆温和静稳天气是导致此次大气污染的主要气象条件. 重污染期(2013年1月11—15日)北京大气ρ(TSP)和ρ(PM10)的日均值分别为426.34和363.46 μg/m3,分别是非污染期(2013年1月2—6日)的3.5和3.4倍;而重污染期TSP和PM10中ρ(无机元素)分别为36.38和18.67 μg/m3,是非污染期的2.2和1.6倍,低于颗粒物质量浓度升幅. 元素质量浓度特征和EF(富集因子)分析表明,Na、Mg、Al、K、Ca、Fe的质量浓度之和占总元素质量浓度的90%以上,其EF均小于10,属地壳类元素,重污染期各元素质量浓度未明显升高;Mn、Cr和Ni 3种元素的EF在研究过程中无明显变化;重污染期PM10中w(Cd)(0.05%)、w(Zn)(3.34%)、w(As)(0.22%)、w(Pb)(3.54%)、w(Mo)(0.03%)、w(Sn)(0.14%)和w(Tl)(0.03%)明显升高,并且这7种元素重污染期与非污染期的质量浓度比值和EF都较高,其来源主要为燃煤、移动源、工业源和垃圾焚烧等人为源. 重污染期本地源对TSP和PM10的贡献略有增加.

     

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  • 收稿日期:  2014-01-19
  • 修回日期:  2014-03-24
  • 刊出日期:  2014-11-25

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