This is a preview and has not been published.

Design and construction of anair pollution detection system using a laser beam and absorption spectroscopy




Air pollutants, Concentration, He-Nelaser, Smoke, Spectroscopy


Air pollution is one of the important problems facing Iraq. Air pollution is the result of uncontrolled emissions from factories, car exhaust electric generators, and oil refineries and often reaches unacceptable limits by international standards. These pollutants can greatly affect human health and regular population activities. For this reason, there is an urgent need for effective devices to monitor the molecular concentration of air pollutants in cities and urban areas. In this research, an optical system has been built consisting of aHelium-Neonlaser,5mWand at 632.8 nm, a glass cell with a defined size, and a power meter(Gentec-E-model: uno) where a scattering of the laser beam occurs due to air pollution. Two pollutants were examined: water vapor and smoke. Experiments were conducted using these pollutants to calibrate the system and determine its detection sensitivity. With this technique the absorption coefficients, types of pollutants and their concentrations were determined.


Download data is not yet available.


Talib A H, Abdulateef Z N, Ali Z A. Measurement of some Air Pollutantsin Printing Units and Copy Centers Within Baghdad City. Baghdad Sci J. 2021; 18(1): 0687-0687.

Chenc W, Tseng Y Sh, Mukundan A, Wang H C. Air Pollution: Sensitive Detection of PM2.5 and PM10 Concentration Using Hyperspectral Imaging. Appl Sci J. 2021; 11(10): 4543.

Anad A M, Hassoon A F, Al-Jiboori M H. Assessment of Air Pollution around Durra Refinery (Baghdad) from Emission NO2 Gasat April Month. Baghdad Sci J. 2022; 19(3): 0515.

Wang Z, Tao Z, Liu D, Xie C, Wang Y. New technique for aerosol detecting in haze day using side –scattering lidar and its inversion method. Earth Space Sci. 2019; 7(1): 1-8.‏

Abud M M, Akhlati J A, Roof A M. Comparison of attenuation coefficient at different lasers 632, 785nm, 1310nm and 1550nm in Dust for optical wireless. J Phy. 2021; 1795: 1.

Zhang Y, Zhi G, Jin W, Wang L, Guo S, Shi R, et al. Differing effects of escalating pollution on absorption and scattering efficiencies of aerosols: Toward co-beneficial air quality enhancement and climate protection measures. Atmos Environ. 2020; 232: 117570.

Ibrahim R I, Al Naimee K A, Yaseen S K. Experimental Evidence of Chaotic Resonance in Semiconductor Laser. Baghdad Sci J. 2021; 18(1): 2411-7986.

Robinson J W. Remote sensing devices for air pollution control. Sci Total Environ. 1974; 3(2): 169-177.

Mayerhöfer TG, Pahlow S, Popp J. The Bouguer-Beer-Lambert law: Shining light on the obscure. Chem phys chem. 2020; 21(18): 2029-2046.

Platt U, Stutz J. Differential Absorption Spectroscopy. In: Differential Optical Absorption Spectroscopy. J Earth Space Phys. 2008; 135–174.

Spitha N, Doolittle P S, Buchberger A R, PazicniS. Simulation-Based Guided Inquiry Activity for Deriving the Beer–Lambert Law. J Chem Educ. 2021; 98(5): 1705-171.

Mayerhöfer T G, Mutschke H, Popp J. Employing Theories Far beyond Their Limits—The Case of the (Boguer-) Beer–Lambert Law. Chem Phys Chem. 2016; 17(13): 1948-1955.

Theodore L. Air pollution control equipment calculations. 1st Ed. Chap.3. John Wiley & Sons. 2008; P. 45.