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天津市夏季灰霾与非灰霾天气下颗粒物污染特征与来源解析

魏欣 毕晓辉 董海燕 陈魁 孙韧 冯银厂

魏欣, 毕晓辉, 董海燕, 陈魁, 孙韧, 冯银厂. 天津市夏季灰霾与非灰霾天气下颗粒物污染特征与来源解析[J]. 环境科学研究, 2012, 25(11): 1193-1200.
引用本文: 魏欣, 毕晓辉, 董海燕, 陈魁, 孙韧, 冯银厂. 天津市夏季灰霾与非灰霾天气下颗粒物污染特征与来源解析[J]. 环境科学研究, 2012, 25(11): 1193-1200.
WEI Xin, BI Xiao-hui, DONG Hai-yan, CHEN Kui, SUN Ren, FENG Yin-chang. Characteristics and Sources of Particulate Matter during Hazy and Non-Hazy Episodes in Tianjin City in Summer[J]. Research of Environmental Sciences, 2012, 25(11): 1193-1200.
Citation: WEI Xin, BI Xiao-hui, DONG Hai-yan, CHEN Kui, SUN Ren, FENG Yin-chang. Characteristics and Sources of Particulate Matter during Hazy and Non-Hazy Episodes in Tianjin City in Summer[J]. Research of Environmental Sciences, 2012, 25(11): 1193-1200.

天津市夏季灰霾与非灰霾天气下颗粒物污染特征与来源解析

基金项目: 国家环境保护公益性行业科研专项(201109002)

Characteristics and Sources of Particulate Matter during Hazy and Non-Hazy Episodes in Tianjin City in Summer

  • 摘要: 年6—8月在天津市区进行的连续灰霾观测发现,灰霾发生的天数占观测时段的1/3. 灰霾日与非灰霾日颗粒物质量浓度存在显著差异,灰霾日ρ(PM2.5)与ρ(PM10)的平均值分别是非灰霾日的1.64和1.55倍. 灰霾日S含量高于非灰霾日近50%;灰霾日ρ(SO42-)和ρ(NO3-)明显高于非灰霾日,其中灰霾日ρ(NO3-)增幅最高可达251.02%;灰霾日PM2.5和PM10中的ρ(OC)、ρ(EC)均是非灰霾日的1.25倍以上. 灰霾日与非灰霾日的气象条件相近,表明此次观测期间天津市区夏季灰霾天气发生与气象条件的关系不大. 使用CMB模型(化学质量平衡模型)对PM2.5来源进行的解析表明,二次硝酸盐和二次硫酸盐对灰霾日ρ(PM2.5)的贡献率分别是非灰霾日的2.17和1.34倍,而其他源类在灰霾日和非灰霾日的贡献差异不明显,说明二次离子可能是造成天津市区夏季灰霾最主要的颗粒物源类.

     

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出版历程
  • 收稿日期:  2012-05-15
  • 修回日期:  2012-08-30
  • 刊出日期:  2012-11-25

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