Open AccessThree-wavelength optical sensor for measuring distributed mass concentrations of aerosols from stationary sources
Author(s) -
Xiao Xiao,
Shu Wang,
Ming Zhu,
Tian Deng,
Ang Chen,
Jin Zeng
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.415490
Subject(s) - mass concentration (chemistry) , wavelength , environmental science , optics , particulates , intensity (physics) , laser , standard deviation , measure (data warehouse) , air mass (solar energy) , light intensity , materials science , remote sensing , physics , chemistry , mechanics , computer science , statistics , mathematics , organic chemistry , boundary layer , database , thermodynamics , geology
Stationary source emissions of key industries, such as thermal power plants, have become the central consideration in environmental protection programs. Existing photoelectric sensors at stationary sources usually use a single wavelength laser to measure the total mass concentration of the particulate matter, bearing inherent errors due to the changing particle size distribution (PSD). However, the total mass concentration cannot comprehensively estimate the air pollution caused by the stationary sources. Therefore, it is required to measure both the mass concentration and PSD of the aerosols emitted by the stationary sources, based on which we can get a distributed mass concentration. To implement this, in this study, we designed a novel three-wavelength photoelectric sensor and tested its performance. Results showed that the prototype correctly determines the mean particle size and standard deviation of the PSDs and consequently adjusts the coefficient for measuring the mass concentration from light intensity, providing a comprehensive assessment of the pollutants.