Measurement and source identification of polycyclic aromatic hydrocarbons (PAHs) in the aerosol in Xi'an, China, by using automated column chromatography and applying positive matrix factorization (PMF)

Tomoaki Okuda, Kazuki Okamoto, Shigeru Tanaka, Zhenxing Shen, Yuemei Han, Zongquan Huo

研究成果: Article査読

97 被引用数 (Scopus)

抄録

In this study, we measured polycyclic aromatic hydrocarbons (PAHs) in aerosols in Xi'an, China from 2005 to 2007, by using a modified Soxhlet extraction followed by a clean-up procedure using automated column chromatography followed by HPLC/fluorescence detection. The sources of PAHs were apportioned by using the positive matrix factorization (PMF) method. The PM10 concentration in winter (161.1 ± 66.4 μg m- 3, n = 242) was 1.5 times higher than that in summer (110.9 ± 34.7 μg m- 3, n = 248). ΣPAH concentrations, which are the sum of the concentrations of all detected PAHs, in winter (344.2 ± 149.7 ng m- 3, n = 45) was 2.5 times higher than that in summer (136.7 ± 56.7 ng m- 3, n = 24) in this study. These strong seasonal variations in atmospheric PAH concentration are possibly due to coal combustion for residential heating. According to the source apportionment with PMF method in this study, the major sources of PAHs in Xi'an are categorized as (1) mobile sources such as vehicle exhaust that constantly contribute to PAH pollution, and (2) stationary sources such as coal combustion that have a large contribution to PAH pollution in winter.

本文言語English
ページ(範囲)1909-1914
ページ数6
ジャーナルScience of the Total Environment
408
8
DOI
出版ステータスPublished - 2010 3 15

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

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