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北京大气颗粒物碳质组分粒径分布的季节变化特征

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樊晓燕, 温天雪, 徐仲均, 王跃思. 北京大气颗粒物碳质组分粒径分布的季节变化特征[J]. 环境化学, 2013, 32(5): 742-747. doi: 10.7524/j.issn.0254-6108.2013.05.004
引用本文: 樊晓燕, 温天雪, 徐仲均, 王跃思. 北京大气颗粒物碳质组分粒径分布的季节变化特征[J]. 环境化学, 2013, 32(5): 742-747. doi: 10.7524/j.issn.0254-6108.2013.05.004
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FAN Xiaoyan, WEN Tianxue, XU Zhongjun, WANG Yuesi. Characteristics and size distributions of organic and element carbon of atmospheric particulate matters in Beijing, China[J]. Environmental Chemistry, 2013, 32(5): 742-747. doi: 10.7524/j.issn.0254-6108.2013.05.004
Citation: FAN Xiaoyan, WEN Tianxue, XU Zhongjun, WANG Yuesi. Characteristics and size distributions of organic and element carbon of atmospheric particulate matters in Beijing, China[J]. Environmental Chemistry, 2013, 32(5): 742-747. doi: 10.7524/j.issn.0254-6108.2013.05.004
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北京大气颗粒物碳质组分粒径分布的季节变化特征

  • 1.

    北京化工大学, 北京, 100029;

  • 2.

    中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京, 100029

  • 基金项目:

    中国科学院战略性先导科技专项-应对气候变化的碳收支认证及相关问题(XDA05100100)

    国家自然科学基金(41021004) 资助.

Characteristics and size distributions of organic and element carbon of atmospheric particulate matters in Beijing, China

  • 1.

    Beijing University of Chemical Technology, Beijing, 100029, China;

  • 2.

    LAPC,Institute of Atmospheric Physics, Chinese Academy of Sciences,Beijing, 100029, China

  • Fund Project:

  • 摘要: 为了解有机碳(OC)和元素碳(EC)在北京大气颗粒物中的季节变化、粒径分布和来源,于2010年3月—2011年2月采用惯性撞击分级采样器采集大气颗粒物样品,热光碳分析仪测定其中有机碳和元素碳质量浓度.结果表明,OC在粗细粒子中含量相当,EC主要存在于细粒子中,在<2.1 μm颗粒物中分别占(52±11)% 和(70±22)%.OC存在明显的季节变化,冬、夏季高于春、秋季,而EC则表现为冬、秋季大于春、夏季.OC和EC粒径分布呈"双峰型",细粒子段峰值分别位于0.43—1.1 μm和0.43—0.65 μm,粗粒子段峰值均位于4.7—5.8 μm.四季峰值对应的粒径段、峰宽和峰高存在差异.OC与EC粒径分布和相关性的季节变化表明,冬季OC与EC的主要来源为燃煤排放,夏季EC的主要来源为机动车尾气.
    Abstract: To investigate seasonal variation, size distribution and source of carbonaceous matters, aerosol samples were collected by cascade impactor from Mar.2010 to Feb.2011 in Beijing. Organic carbon (OC) and Element carbon (EC) were detected by DRI 2001A carbon analyzer. The results showed that OC exhibited almost the same content in coarse and fine particles and EC were mainly enriched in fine particles (<2.1 μm), which accounted for (52±11)% and (70±22)%, respectively. The OC concentrations were higher in winter and summer than in spring and autumn, and EC concentrations were higher in autumn and winter than in spring and summer. The size distributions of OC and EC showed a bi-modal with peaks in the size of 0.43—1.1 μm and 0.43—0.65 μm in fine particles, respectively, and 4.7—5.8 μm in coarse particles. The size, width and height of peaks were different in four seasons. The results of seasonal size distributions and correlations between OC and EC indicated that coal combustion is the main source for OC and EC in winter and exhaust of motor vehicle is the major source for EC in summer.
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  • 收稿日期:  2012-08-20

北京大气颗粒物碳质组分粒径分布的季节变化特征

  • 1.  北京化工大学, 北京, 100029;
  • 2.  中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京, 100029
  • 收稿日期:  2012-08-20
基金项目:

中国科学院战略性先导科技专项-应对气候变化的碳收支认证及相关问题(XDA05100100)

国家自然科学基金(41021004) 资助.

摘要: 为了解有机碳(OC)和元素碳(EC)在北京大气颗粒物中的季节变化、粒径分布和来源,于2010年3月—2011年2月采用惯性撞击分级采样器采集大气颗粒物样品,热光碳分析仪测定其中有机碳和元素碳质量浓度.结果表明,OC在粗细粒子中含量相当,EC主要存在于细粒子中,在<2.1 μm颗粒物中分别占(52±11)% 和(70±22)%.OC存在明显的季节变化,冬、夏季高于春、秋季,而EC则表现为冬、秋季大于春、夏季.OC和EC粒径分布呈"双峰型",细粒子段峰值分别位于0.43—1.1 μm和0.43—0.65 μm,粗粒子段峰值均位于4.7—5.8 μm.四季峰值对应的粒径段、峰宽和峰高存在差异.OC与EC粒径分布和相关性的季节变化表明,冬季OC与EC的主要来源为燃煤排放,夏季EC的主要来源为机动车尾气.

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