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Environ Sci Pollut Res Int

Title:		Photochemical aging and secondary organic aerosols generated from limonene in an oxidation flow reactor
Author(s):		Sbai SE; Farida B;
Address:		"Universite Lyon, Universite Claude Bernard Lyon 1, CNRS, IRCELYON,2 Avenue Albert Einstein, 69100, Lyon, France. salaheddinechimie@gmail.com. Department of physics, Laboratoires de physique des hauts Energies Modelisation et Simulation, Mohammed V University in Rabat, Rabat, Morocco. salaheddinechimie@gmail.com. Department of physics, Laboratoires de physique des hauts Energies Modelisation et Simulation, Mohammed V University in Rabat, Rabat, Morocco"
Journal Title:		Environ Sci Pollut Res Int
Year:		2019
Volume:		20190502
Issue:		18
Page Number:		18411 - 18420
DOI:		10.1007/s11356-019-05012-5
ISSN/ISBN:		1614-7499 (Electronic) 0944-1344 (Linking)
Abstract:		"Oxidation flow reactors (OFRs) are increasingly used to study the formation and evolution of secondary organic aerosols (SOA) in the atmosphere. The OH/HO(2) and OH/O(3) ratios in OFRs are similar to tropospheric ratios. In the present work, we investigated the production of SOA generated by OH oxydation and ozonolysis of limonene in OFR as a function of OH exposure and O(3) exposure. The results are compared with those obtained from the simulation chambers. The precursor gas is exposed to OH concentrations ranging from 2.11 x 10(8) to 1.91 x 10(9) molec cm(-3), with an estimated exposure time in the OFR of 137 s. In the environmental chambers, the precursor was oxidized using OH concentrations between 2.10 x 10(6) and 2.12 x 10(7) molec cm(-3) over exposure times of several hours. In the overlapping OH exposure region, the highest SOA yields are obtained in the OFR, which is explained by the ozonolysis of limonene in the OFR. However, the yields decrease with the increase of OHexp in both systems"
Keywords:		"Aerosols/*analysis Atmosphere/analysis Equipment Design Hydroxyl Radical/chemistry *Limonene/chemistry/radiation effects *Models, Theoretical Oxidation-Reduction Ozone/chemistry Photochemical Processes *Ultraviolet Rays Volatile Organic Compounds/*analysi;"
Notes:		"MedlineSbai, Salah Eddine Farida, Bentayeb eng Germany 2019/05/03 Environ Sci Pollut Res Int. 2019 Jun; 26(18):18411-18420. doi: 10.1007/s11356-019-05012-5. Epub 2019 May 2"