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西安冬、夏季PM2.5中水溶性无机离子的变化特征

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杨素霞, 曹军骥, 沈振兴, 刘随心, 张婷, 王启元, 强娟, 李文韬. 西安冬、夏季PM2.5中水溶性无机离子的变化特征[J]. 环境化学, 2012, 31(8): 1179-1188.
引用本文: 杨素霞, 曹军骥, 沈振兴, 刘随心, 张婷, 王启元, 强娟, 李文韬. 西安冬、夏季PM2.5中水溶性无机离子的变化特征[J]. 环境化学, 2012, 31(8): 1179-1188.
shu
YANG Suxia, CAO Junji, SHEN Zhenxing, LIU Suixin, ZHANG Ting, WANG Qiyuan, QIANG Juan, LI Wentao. Variations of water-soluble ions in PM2.5 at Xi'an between summer and winter[J]. Environmental Chemistry, 2012, 31(8): 1179-1188.
Citation: YANG Suxia, CAO Junji, SHEN Zhenxing, LIU Suixin, ZHANG Ting, WANG Qiyuan, QIANG Juan, LI Wentao. Variations of water-soluble ions in PM2.5 at Xi'an between summer and winter[J]. Environmental Chemistry, 2012, 31(8): 1179-1188.
shu

西安冬、夏季PM2.5中水溶性无机离子的变化特征

  • 1.

    中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 西安, 710075;

  • 2.

    中国科学院研究生院, 北京, 100049;

  • 3.

    西安交通大学全球环境变化研究院, 西安, 710049;

  • 4.

    西安交通大学环境科学与工程系, 西安, 710049;

  • 5.

    陕西省西安市环境监测站, 西安, 710054

  • 基金项目:

    国家自然科学基金项目(NSFC40925009)资助.

Variations of water-soluble ions in PM2.5 at Xi'an between summer and winter

  • 1.

    Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710075, China;

  • 2.

    Graduate University of Chinese Academy of Sciences, 100049, China;

  • 3.

    The Academy of Global Environmental Change, Xi'an Jiaotong University, Xi'an, 710049, China;

  • 4.

    School of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China;

  • 5.

    The Environmental Monitoring Station of Xi'an, Xi'an, 710054, China

  • Fund Project:

  • 摘要: 为探讨西安市冬、夏季水溶性无机离子的季节和空间变化特征,2010年1月和7月分别在西安城区4个站点及上风区高陵(GL)和下风区黑河(HH)连续采集2周的PM2.5样品,使用离子色谱仪分析样品中水溶性无机离子成分.结果表明,PM2.5质量浓度冬季明显高于夏季,空间变化表现为:城区站点浓度均值(172.6 μg·m-3)>上风区点GL(98.9 μg·m-3)>下风区点HH(81.0 μg·m-3).水溶性无机离子浓度总和占PM2.5质量浓度的41.8%,其中SO42-、NO3-和NH4+是水溶性离子的主要成分,分别占总离子质量浓度的35.1%、22.6%和12.2%.Na+、Ca2+和Mg2+在冬、夏季浓度相差不大,而SO42-、NO3-、NH4+以及K+、Cl-等均明显表现为冬季浓度高于夏季.SO42-、NO3-和NH4+在冬、夏季空间变化均表现为城区站点>GL>HH,这3种离子夏季在大气中的主要存在方式为NH4HSO4和NH4NO3,而冬季主要以(NH4)2SO4、NH4NO3和NH4Cl形式存在.NO3-/SO42-的比值为0.64,表明西安市固定源仍是主要污染贡献源,但是移动源所占比例较之前研究有所上升,应采取一定措施控制机动车数量并加强排放监控.
    Abstract: To investigate the seasonal and temporal variations of water-soluble ions in Xi'an,PM2.5 samples were collected in January and July of 2010 at four urban sites and two rural sites: GaoLing (GL) and HeiHe (HH). Five cations (NH4+, K+, Ca2+, Mg2+ and Na+) and three anions(SO42-, NO3- and Cl-) were determined by ion chromatography. The average concentration of PM2.5 was 172.6 μg·m-3 at the urban sites, 98.2 μg·m-3 at GL, and 81.0 μg·m-3 at HH. PM2.5 mass had a higher concentration in the winter than summer. Total ions accounted for 41.8% of the PM2.5 mass, and SO42-, NO3-, and NH4+ were the most abundant components of the ions, which accounted for 35.1%, 22.6%, and 12.2% of the total ions, respectively. Na+, Ca2+ and Mg2+ had a considerable level in both summer and winter, but the concentration of other ions were higher in the winter. K+ and Ca2+ had a peaked concentration at the two rural sites (GL and HH) in the winter which were different from the summer, while the other ions were higher at the urban sites in both summer and winter. The correlation among ions suggested that principal water-soluble ions existed in the form of NH4HSO4 and NH4NO3 in the summer while (NH4)2SO4, NH4NO3 and NH4Cl in the winter. The ratio of NO3-/SO42- in Xi'an was 0.64, indicating that coal combustion was still the main pollution in Xi'an.
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  • 收稿日期:  2011-10-19
杨素霞, 曹军骥, 沈振兴, 刘随心, 张婷, 王启元, 强娟, 李文韬. 西安冬、夏季PM2.5中水溶性无机离子的变化特征[J]. 环境化学, 2012, 31(8): 1179-1188.
引用本文: 杨素霞, 曹军骥, 沈振兴, 刘随心, 张婷, 王启元, 强娟, 李文韬. 西安冬、夏季PM2.5中水溶性无机离子的变化特征[J]. 环境化学, 2012, 31(8): 1179-1188.
shu
YANG Suxia, CAO Junji, SHEN Zhenxing, LIU Suixin, ZHANG Ting, WANG Qiyuan, QIANG Juan, LI Wentao. Variations of water-soluble ions in PM2.5 at Xi'an between summer and winter[J]. Environmental Chemistry, 2012, 31(8): 1179-1188.
Citation: YANG Suxia, CAO Junji, SHEN Zhenxing, LIU Suixin, ZHANG Ting, WANG Qiyuan, QIANG Juan, LI Wentao. Variations of water-soluble ions in PM2.5 at Xi'an between summer and winter[J]. Environmental Chemistry, 2012, 31(8): 1179-1188.
shu

西安冬、夏季PM2.5中水溶性无机离子的变化特征

  • 1.  中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 西安, 710075;
  • 2.  中国科学院研究生院, 北京, 100049;
  • 3.  西安交通大学全球环境变化研究院, 西安, 710049;
  • 4.  西安交通大学环境科学与工程系, 西安, 710049;
  • 5.  陕西省西安市环境监测站, 西安, 710054
  • 收稿日期:  2011-10-19
基金项目:

国家自然科学基金项目(NSFC40925009)资助.

摘要: 为探讨西安市冬、夏季水溶性无机离子的季节和空间变化特征,2010年1月和7月分别在西安城区4个站点及上风区高陵(GL)和下风区黑河(HH)连续采集2周的PM2.5样品,使用离子色谱仪分析样品中水溶性无机离子成分.结果表明,PM2.5质量浓度冬季明显高于夏季,空间变化表现为:城区站点浓度均值(172.6 μg·m-3)>上风区点GL(98.9 μg·m-3)>下风区点HH(81.0 μg·m-3).水溶性无机离子浓度总和占PM2.5质量浓度的41.8%,其中SO42-、NO3-和NH4+是水溶性离子的主要成分,分别占总离子质量浓度的35.1%、22.6%和12.2%.Na+、Ca2+和Mg2+在冬、夏季浓度相差不大,而SO42-、NO3-、NH4+以及K+、Cl-等均明显表现为冬季浓度高于夏季.SO42-、NO3-和NH4+在冬、夏季空间变化均表现为城区站点>GL>HH,这3种离子夏季在大气中的主要存在方式为NH4HSO4和NH4NO3,而冬季主要以(NH4)2SO4、NH4NO3和NH4Cl形式存在.NO3-/SO42-的比值为0.64,表明西安市固定源仍是主要污染贡献源,但是移动源所占比例较之前研究有所上升,应采取一定措施控制机动车数量并加强排放监控.

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