Laser & Optoelectronics Progress, Volume. 57, Issue 9, 093003(2020)
Traffic Pollution Gas Monitoring Based on Differential Optical Absorption Spectroscopy Technology
In this study, the concentration levels of NO2, O3, and SO2 at the crossroad of Haier Road and East Yinchuan Road, Qingdao, are continually monitored in real-time based on the long path differential optical absorption spectroscopy (LP-DOAS) from 2017 to 2018. The concentration levels of NO2, O3, and SO2 obtained using LP-DOAS are compared with those obtained at the environmental monitor station, and a good agreement between these is found. The correlation coefficients of NO2 and O3 hourly average results are 0.78 and 0.798, respectively, and the correlation coefficients of monthly average results of these are 0.91 and 0.84, respectively. The diurnal variation of NO2 concentration presents two peaks, i.e., in the morning and evening. Compared with the real-time traffic flow, NO2 concentration is strongly positively correlated with traffic flow, and the correlation coefficient is 0.95. There is a significant weekend effect in the NO2 concentration on working days relative to weekends.
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Zhangjun Wang, Jing Hao, Chenguang Song, Xianxin Li. Traffic Pollution Gas Monitoring Based on Differential Optical Absorption Spectroscopy Technology[J]. Laser & Optoelectronics Progress, 2020, 57(9): 093003
Category: Spectroscopy
Received: Sep. 1, 2019
Accepted: Sep. 16, 2019
Published Online: May. 6, 2020
The Author Email: Li Xianxin (18661886527@163.com)