The 2013 severe haze over the Southern Hebei, China: PM2.5 composition and source apportionment

Developmental Biology

Ming–Zhang Chen¹  Zhe Wei³  Yan Zheng²  Li–Tao Wang³ 

[1] School of Civil Engineering, Shijiazhuang Railway Institute, No. 17 North 2nd–Ring East Road, Shijiazhuang, Hebei 050043, China$$;The Environmental Monitoring Center of Handan, Handan, Hebei 056002, China$$;Department of Environmental Engineering, School of City Construction, Hebei University of Engineering, Handan, Hebei 056038, China$$

关键词: PM2.5;    OC;    Bext;    PMF;    source apportionment;   

DOI  :  10.5094/APR.2014.085

学科分类：农业科学（综合）

来源: Dokuz Eylul Universitesi * Department of Environmental Engineering

【 摘 要 】

PM_2.5 samples were collected and analyzed for the first time in Handan City, which was listed in the top 4 polluted cities in China, during December 2012 to January 2013 when the record–breaking severe haze pollution happened. Positive Matrix Factorization method (PMF) was applied to understand major sources to the severe haze pollution over this city. The daily average concentration of PM_2.5 was 160.1 μg m^–3, which was 2.1 times of the National Ambient Air Quality Standards of China (Class II, Annual Average Level) for daily average PM_2.5 of 75 μg m^–3. SO₄^2– was the most abundant ion (15.4%), followed by NH₄⁺ and NO₃^–. They accounted for 39.5% of PM_2.5. Eight factors were identified by positive matrix factorization (PMF) model. The major sources were coal combustion source (25.9%), secondary source (21.8%), industry source (16.2%), Ba, Mn and Zn source (12.7%), motor vehicle source (7.7%), road dust source (10.9%), K⁺, As and V source (6.3%) and fuel oil combustion source (2.5%).The mean value of extinction coefficient (B_ext) was 682.1 Mm^–1 and the largest contributor to B_ext was ammonium sulfate with the mean value of 221.0 Mm^–1, accounted for 32.4% of the B_ext.

【 授权许可】

Unknown   

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