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J Environ Sci (China)

Title:		"Atmospheric photochemistry and secondary aerosol formation of urban air in Lyon, France"
Author(s):		Sbai SE; Li C; Boreave A; Charbonnel N; Perrier S; Vernoux P; Bentayeb F; George C; Gil S;
Address:		"Department of physics, Laboratoires de physique des hauts Energies Modelisation et Simulation, Mohammed V University in Rabat, Rabat, Morocco. Electronic address: salaheddinechimie@gmail.com. Universite Lyon, Universite Claude Bernard Lyon 1, CNRS, IRCELYON,2 Avenue Albert Einstein, 69100 Lyon, France; Department of Earth and Planetary Sciences, Weizmann Institute of Science, 76100 Rehovot, Israel. Universite Lyon, Universite Claude Bernard Lyon 1, CNRS, IRCELYON,2 Avenue Albert Einstein, 69100 Lyon, France. Department of physics, Laboratoires de physique des hauts Energies Modelisation et Simulation, Mohammed V University in Rabat, Rabat, Morocco. Universite Lyon, Universite Claude Bernard Lyon 1, CNRS, IRCELYON,2 Avenue Albert Einstein, 69100 Lyon, France. Electronic address: sonia.gil@ircelyon.univ-lyon1.fr"
Journal Title:		J Environ Sci (China)
Year:		2021
Volume:		20200727
Issue:
Page Number:		311 - 323
DOI:		10.1016/j.jes.2020.06.037
ISSN/ISBN:		1001-0742 (Print) 1001-0742 (Linking)
Abstract:		"Photochemical aging of volatile organic compounds (VOCs) in the atmosphere is an important source of secondary organic aerosol (SOA). To evaluate the formation potential of SOA at an urban site in Lyon (France), an outdoor experiment using a Potential Aerosol Mass (PAM) oxidation flow reactor (OFR) was conducted throughout entire days during January-February 2017. Diurnal variation of SOA formations and their correlation with OH radical exposure (OHexp), ambient pollutants (VOCs and particulate matters, PM), Relative Humidity (RH), and temperature were explored in this study. Ambient urban air was exposed to high concentration of OH radicals with OHexp in range of (0.2-1.2)x10(12) molecule/(cm(3)*sec), corresponding to several days to weeks of equivalent atmospheric photochemical aging. The results informed that urban air at Lyon has high potency to contribute to SOA, and these SOA productions were favored from OH radical photochemical oxidation rather than via ozonolysis. Maximum SOA formation (36 microg/m(3)) was obtained at OHexp of about 7.4 x 10(11)molecule/(cm(3)*sec), equivalent to approximately 5 days of atmospheric oxidation. The correlation between SOA formation and ambient environment conditions (RH & temperature, VOCs and PM) was observed. It was the first time to estimate SOA formation potential from ambient air over a long period in urban environment of Lyon"
Keywords:		Aerosols/analysis *Air Pollutants/analysis France Particulate Matter Photochemistry Lyon Oxidation Flow Reactor (OFR) Secondary Organic Aerosol (SOA) Urban air Volatile Organic Compounds (VOC);
Notes:		"MedlineSbai, Salah Eddine Li, Chunlin Boreave, Antoinette Charbonnel, Nicolas Perrier, Sebastien Vernoux, Philippe Bentayeb, Farida George, Christian Gil, Sonia eng Netherlands 2020/11/14 J Environ Sci (China). 2021 Jan; 99:311-323. doi: 10.1016/j.jes.2020.06.037. Epub 2020 Jul 27"