Atmospheric degradation of pyridine: UV absorption spectrum and reaction with OH radicals and O3

M. Errami; Gisèle El Dib; M. Cazaunau; E. Roth; R. Salghi; Abdelwahid Mellouki; A. Chakir

doi:10.1016/j.cplett.2016.09.030

Atmospheric degradation of pyridine: UV absorption spectrum and reaction with OH radicals and O3

M. Errami ^{1, 2} Gisèle El Dib ³ M. Cazaunau ⁴ E. Roth ² R. Salghi ¹ Abdelwahid Mellouki ⁴ A. Chakir ^{2, *}

* Corresponding author

1 ENSA - Ecole Nationale des Sciences Appliquées [Agadir]

2 GSMA - Groupe de spectrométrie moléculaire et atmosphérique - UMR 7331

3 IPR - Institut de Physique de Rennes

4 ICARE - Institut de Combustion, Aérothermique, Réactivité et Environnement

Abstract : The UV absorption spectrum of pyridine and its gas phase reactions with OH radicals and O3 were investigated. UV absorption cross-sections were determined by using a D2-lamp system in the range 200–350 nm. The kinetic studies were carried out at room temperature and atmospheric pressure of purified air. The rate coefficient for the reaction of pyridine with OH was determined relative to that with acetone while that with O3 was measured under pseudo first order conditions. The rate coefficients obtained are (in cm3 molecule− 1 s− 1): k(OH + pyridine) = (5.40 ± 0.80) × 10−13 and k(O3 + pyridine) = (3.28 ± 1.70) × 10−20. © 2016 Elsevier B.V.

Keywords : Tropospheric lifetime OH radical Rate coefficients Acetone Air purification Atmospheric pressure Chemical reactions Electromagnetic wave absorption Enzyme kinetics Free radicals Light absorption Ozone Phase interfaces Pyridine Atmospheric simulations UV absorption Absorption spectroscopy

Document type :

Journal articles

Domain :

Physics [physics]

Chemical Sciences

Complete list of metadatas

Cited literature [19 references] Display Hide Download

https://hal-univ-rennes1.archives-ouvertes.fr/hal-01380706
Contributor : Laurent Jonchère <>
Submitted on : Thursday, November 24, 2016 - 2:48:18 PM
Last modification on : Wednesday, March 20, 2019 - 1:20:19 AM
Long-term archiving on: Tuesday, March 21, 2017 - 4:01:42 AM

Atmospheric degradation of Pyr...

Files produced by the author(s)

Atmospheric degradation of pyridine: UV absorption spectrum and reaction with OH radicals and O3

File

Identifiers

Collections

Citation

Export

Metrics

357

172

Atmospheric degradation of pyridine: UV absorption spectrum and reaction with OH radicals and O3

File

Identifiers

Collections

Citation

Export

Share

Metrics

357

172