北京灰霾天PM<sub>2.5</sub>中有机官能团和无机离子的ATR-FTIR研究

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Abstract

An Attenuated Total Reflectance-Fourier Transform Infrared (ART-FTIR) spectroscopy was used to measure the functional groups (R-NO₂, R-CO-, R-CH and R-OH) and inorganic ions (SO₄^2-, NO₃^- and NH₄⁺) in PM_2.5 collected in the northwest of Beijing during haze days. The absorption peaks of inorganic ions (NH₄⁺, SO₄^2- and NO₃^-) were higher than those of functional groups (R-NO₂, R-CO-, R-CH and R-OH), the absorption peak of R-CH was higher than those of R-NO₂ and R-CO-, and the absorption peak of R-OH was lowest. The absorption peaks of these functional groups and inorganic ions of the PM_2.5 in haze days were higher than those in the non-haze days, indicating that the mass concentrations of these functional groups and inorganic ions in haze days were higher than those in the non-haze days. During haze days, the mass concentrations of the inorganic ions (NH₄⁺, SO₄^2- and NO₃^-) were higher than those of functional groups (R-NO₂, R-CO-, R-CH and R-OH), the mass concentration of R-CH was higher than those of R-NO₂ and R-CO-, and the mass concentration of R-OH was lowest.

Key words： PM_2.5 haze organic functional groups inorganic ions ATR-FTIR Beijing

Received: 18 November 2015

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X513

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	Articles by authors
	XING Jiao-ping
	SHAO Long-yi
	LI Hong
	GUO Qian
	WANG Wen-hua
	ZUO Xiao-chao

Cite this article:

XING Jiao-ping,SHAO Long-yi,LI Hong等. ATR-FTIR characterization of organic functional groups and inorganic ions of the haze PM_2.5 in Beijing[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(6): 1654-1659.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I6/1654

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