Identifying PM<sub>2.5</sub> samples collected in different environment by using terahertz time-domain spectroscopy

doi:10.1007/s12200-018-0805-1

Front. Optoelectron.

2018, Vol. 11

Issue (3) : 256-260 https://doi.org/10.1007/s12200-018-0805-1

RESEARCH ARTICLE

Identifying PM_2.5 samples collected in different environment by using terahertz time-domain spectroscopy

Chenghong WU, Xinyang MIAO, Kun ZHAO(

)

Beijing Key Laboratory of Optical Detection Technology for Oil and Gas, China University of Petroleum, Beijing 102249, China

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Abstract

Particulate matter with the diameter of less than 2.5 mm (PM_2.5) is the most important causation of air pollution. In this study, PM_2.5 samples were collected in three different environment including ordinary atmospheric environment, lampblack environment and the environment with an air conditioning exhaust fan, and analyzed by using terahertz time-domain spectroscopy (THz-TDS). The linear regression analysis and the principal component analysis (PCA) are used to identify PM_2.5 samples collected in different environment. The results indicate that combining THz-TDS with statistical methods can serve as a contactless and efficient approach to identify air pollutants in different environment.

Keywords PM_2.5 terahertz time-domain spectroscopy (THz-TDS) statistical methods

Corresponding Author(s): Kun ZHAO

Just Accepted Date: 18 May 2018 Online First Date: 21 June 2018 Issue Date: 31 August 2018

Cite this article:

Chenghong WU,Xinyang MIAO,Kun ZHAO. Identifying PM_2.5 samples collected in different environment by using terahertz time-domain spectroscopy[J]. Front. Optoelectron., 2018, 11(3): 256-260.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-018-0805-1
https://academic.hep.com.cn/foe/EN/Y2018/V11/I3/256

Fig.1 PM_2.5 samples collected in different environment. (a) Ordinary atmospheric environment; (b) lampblack environment; (c) environment with an air conditioning exhaust fan; (d) blank filter

Fig.2 THz-TDS of samples and air

Fig.3 PM_2.5 mass dependent the degree of attenuation

Fig.4 Frequency dependence of the absorbance spectra for PM_2.5 samples collected in three different environment

Fig.5 Two-dimensional system of PC1 versus PC2 plot calculated by PC

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