Probing PM2.5 with terahertz wave

The goal of continuous ambient participate monitoring has been accomplished by the use of terahertz （THz） wave. The fre- quency-dependent spectrum and absorbance of the particulate matter （PM2.5） were measured in the range of 0-10 THz. The PM2.5 concentration ,o was calculated according to the sampl...

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Published inScience China. Physics, mechanics & astronomy Vol. 57; no. 12; pp. 2354 - 2356
Main Authors Li, Qian, Zhao, Kun, Zhang, LeiWei, Liang, Chuan, Zhang, ZhenWei, Zhang, CunLin, Han, DongHai
Format Journal Article
LanguageEnglish
Published Heidelberg Science China Press 01.12.2014
Springer Nature B.V
Subjects
Absorbance
Air flow
Astronomy
Classical and Continuum Physics
Letter
Observations and Techniques
Particulate matter
Physics
Physics and Astronomy
PM2.5
SPECT
Terahertz frequencies
太赫兹波
微粒物质
探测
环境监督
空气流量
频率依赖性
absorbance
concentration
terahertz
PM
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Summary:The goal of continuous ambient participate monitoring has been accomplished by the use of terahertz （THz） wave. The fre- quency-dependent spectrum and absorbance of the particulate matter （PM2.5） were measured in the range of 0-10 THz. The PM2.5 concentration ,o was calculated according to the sampling time and air flow. With the increase of ,o, the THz wave am- plitude gradually decreased and the absorbance A of PM2.5 increased. The relationship between p and A can be described mathematically through p∝ A0.5. Our results demonstrate that the terahertz wave could be a valuable tool to monitor and in- spect the PM2.5 concentration.
Bibliography:11-5000/N
The goal of continuous ambient participate monitoring has been accomplished by the use of terahertz （THz） wave. The fre- quency-dependent spectrum and absorbance of the particulate matter （PM2.5） were measured in the range of 0-10 THz. The PM2.5 concentration ,o was calculated according to the sampling time and air flow. With the increase of ,o, the THz wave am- plitude gradually decreased and the absorbance A of PM2.5 increased. The relationship between p and A can be described mathematically through p∝ A0.5. Our results demonstrate that the terahertz wave could be a valuable tool to monitor and in- spect the PM2.5 concentration.
PM2.5, terahertz, concentration, absorbance
LI Qian, ZHAO Kun, ZHANG LeiWei, LIANG Chuan, ZHANG ZhenWei, ZHANG CunLin ＆ HAN DongHai 1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China; 2 Key Laboratory of Oil and Gas Terahertz Spectroscopy and Photoelectric Detection, China Petroleum and Chemical Industry Federation （CPCIF）, Beijing 100723, China; 3 Beijing Key Laboratory of Optical Detection Technology for Oil and Gas, China University of Petroleum, Beijing 102249, China; 4 Department of Physics, Capital Normal University, Beijing 100048, China; 5 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
ISSN:1674-7348
1869-1927
DOI:10.1007/s11433-014-5569-z