ATR-FTIR characterization of organic functional groups and inorganic ions of the haze PM2.5 in Beijing
XING Jiao-ping1, SHAO Long-yi1, LI Hong2, GUO Qian1, WANG Wen-hua1, ZUO Xiao-chao1
1. College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China;
2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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 (SO42-, NO3- and NH4+) in PM2.5 collected in the northwest of Beijing during haze days. The absorption peaks of inorganic ions (NH4+, SO42- 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 PM2.5 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+, SO42- 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.
幸娇萍, 邵龙义, 李红, 郭茜, 王文华, 左小超. 北京灰霾天PM2.5中有机官能团和无机离子的ATR-FTIR研究[J]. 中国环境科学, 2016, 36(6): 1654-1659.
XING Jiao-ping, SHAO Long-yi, LI Hong, GUO Qian, WANG Wen-hua, ZUO Xiao-chao. ATR-FTIR characterization of organic functional groups and inorganic ions of the haze PM2.5 in Beijing. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(6): 1654-1659.
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