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南京市秋季大气颗粒物中有机碳和元素碳的浓度水平及分布特征

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袁思宇, 沈国锋, 赵秋月. 南京市秋季大气颗粒物中有机碳和元素碳的浓度水平及分布特征[J]. 环境化学, 2014, 33(5): 724-730. doi: 10.7524/j.issn.0254-6108.2014.05.021
引用本文: 袁思宇, 沈国锋, 赵秋月. 南京市秋季大气颗粒物中有机碳和元素碳的浓度水平及分布特征[J]. 环境化学, 2014, 33(5): 724-730. doi: 10.7524/j.issn.0254-6108.2014.05.021
shu
YUAN Siyu, SHEN Guofeng, ZHAO Qiuyue. Concentrations and distribution characteristics of organic carbon and element carbon in ambient particulate matter (PM10 and PM2.5) during autumn in Nanjing[J]. Environmental Chemistry, 2014, 33(5): 724-730. doi: 10.7524/j.issn.0254-6108.2014.05.021
Citation: YUAN Siyu, SHEN Guofeng, ZHAO Qiuyue. Concentrations and distribution characteristics of organic carbon and element carbon in ambient particulate matter (PM10 and PM2.5) during autumn in Nanjing[J]. Environmental Chemistry, 2014, 33(5): 724-730. doi: 10.7524/j.issn.0254-6108.2014.05.021
shu

南京市秋季大气颗粒物中有机碳和元素碳的浓度水平及分布特征

  • 1.

    江苏省环境科学研究院, 南京, 210029

  • 基金项目:

    江苏省自然科学基金（BK20131031）；中国博士后科学基金（2013M531322）资助.

Concentrations and distribution characteristics of organic carbon and element carbon in ambient particulate matter (PM10 and PM2.5) during autumn in Nanjing

  • 1.

    Department of Atmospheric Sciences, Jiangsu Provincial Academy of Environmental Sciences, Nanjing, 210029, China

  • Fund Project:

  • 摘要: 在2011年秋季，连续24 h采集南京市区大气粗颗粒物（PM10）和细颗粒物（PM2.5）样品，采用IMPROVE-热光反射法（TOR），分析样品中的有机碳（OC）和元素碳（EC）的浓度水平和分布特征.研究表明，南京秋季观测期间PM10中OC和EC的平均浓度水平分别在23.3±11.0 μg·m-3和7.7±3.2 μg·m-3，PM2.5中，OC和EC的浓度分别是18.1±9.6 μg·m-3和6.6±2.9 μg·m-3.与国内其他城市相比，南京市秋季的碳组分浓度处于较低水平，但与发达国家的城市相比，浓度水平很高.观测期内PM10和PM2.5中的OC和EC的日变化规律与颗粒物的相似，趋势相近.OC和EC主要分布于细粒子PM2.5中，且EC比OC更倾向于在细颗粒物上的分布.基于8碳组分（OC1，OC2，OC3，OC4，OPC，EC1，EC2和EC3）分析结果初步判断，南京市秋季机动车汽油燃烧排放污染是EC1的主要来源，对南京市碳气溶胶贡献最大；生物质燃烧、工业燃煤，道路和施工扬尘是OC的主要来源，对南京市大气中碳气溶胶贡献较大；柴油燃烧是EC2和EC3的主要来源，对南京市碳气溶胶的贡献最小.
    Abstract: The 24 h PM2.5 and PM10 samples were collected during Nov. 2011 in Nanjing. Organic carbon (OC) and elemental carbon (EC) in atmospheric particles were simultaneously measured during sampling periods. The OC and EC were analyzed by thermal/optical reflectance (TOR) following the Interagency Monitoring of Protected Visual Environments (IMPROVE) protocol. The average concentrations of OC and EC in PM10 were 23.3±11.0 μg·m-3 and 7.7±3.2 μg·m-3 respectively. The average concentrations of OC and EC in PM2.5 were 18.1±9.6 μg·m-3 and 6.6±2.9 μg·m-3 respectively. The level of PM2.5 and PM10 was much higher than the cities of the developed countries. OC and EC concentrations were lower than other chinese cities, but much higher than those in the developed countries. The particle size distribution of OC and EC indicated that the OC and EC were mainly enriched in the fine particles (PM2.5). The results from the eight fractions of carbonaceous carbon (OC1,OC2,OC3,OC4,OPC,EC1,EC2 and EC3) suggested that the influences of diesel combustion and emission (EC2 and EC3) were negligible, while the emission of coal combustion, biomass combustion, road dust contributed to OC, and gasoline combustion from EC1 dominated the source of carbonaceous carbon in the city.
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  • 收稿日期:  2013-10-10
袁思宇, 沈国锋, 赵秋月. 南京市秋季大气颗粒物中有机碳和元素碳的浓度水平及分布特征[J]. 环境化学, 2014, 33(5): 724-730. doi: 10.7524/j.issn.0254-6108.2014.05.021
引用本文: 袁思宇, 沈国锋, 赵秋月. 南京市秋季大气颗粒物中有机碳和元素碳的浓度水平及分布特征[J]. 环境化学, 2014, 33(5): 724-730. doi: 10.7524/j.issn.0254-6108.2014.05.021
shu
YUAN Siyu, SHEN Guofeng, ZHAO Qiuyue. Concentrations and distribution characteristics of organic carbon and element carbon in ambient particulate matter (PM10 and PM2.5) during autumn in Nanjing[J]. Environmental Chemistry, 2014, 33(5): 724-730. doi: 10.7524/j.issn.0254-6108.2014.05.021
Citation: YUAN Siyu, SHEN Guofeng, ZHAO Qiuyue. Concentrations and distribution characteristics of organic carbon and element carbon in ambient particulate matter (PM10 and PM2.5) during autumn in Nanjing[J]. Environmental Chemistry, 2014, 33(5): 724-730. doi: 10.7524/j.issn.0254-6108.2014.05.021
shu

南京市秋季大气颗粒物中有机碳和元素碳的浓度水平及分布特征

  • 1. 江苏省环境科学研究院, 南京, 210029
  • 收稿日期:  2013-10-10
基金项目:

江苏省自然科学基金（BK20131031）；中国博士后科学基金（2013M531322）资助.

摘要: 在2011年秋季，连续24 h采集南京市区大气粗颗粒物（PM10）和细颗粒物（PM2.5）样品，采用IMPROVE-热光反射法（TOR），分析样品中的有机碳（OC）和元素碳（EC）的浓度水平和分布特征.研究表明，南京秋季观测期间PM10中OC和EC的平均浓度水平分别在23.3±11.0 μg·m-3和7.7±3.2 μg·m-3，PM2.5中，OC和EC的浓度分别是18.1±9.6 μg·m-3和6.6±2.9 μg·m-3.与国内其他城市相比，南京市秋季的碳组分浓度处于较低水平，但与发达国家的城市相比，浓度水平很高.观测期内PM10和PM2.5中的OC和EC的日变化规律与颗粒物的相似，趋势相近.OC和EC主要分布于细粒子PM2.5中，且EC比OC更倾向于在细颗粒物上的分布.基于8碳组分（OC1，OC2，OC3，OC4，OPC，EC1，EC2和EC3）分析结果初步判断，南京市秋季机动车汽油燃烧排放污染是EC1的主要来源，对南京市碳气溶胶贡献最大；生物质燃烧、工业燃煤，道路和施工扬尘是OC的主要来源，对南京市大气中碳气溶胶贡献较大；柴油燃烧是EC2和EC3的主要来源，对南京市碳气溶胶的贡献最小.

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