Oxidation of biogenic and water-soluble compounds in aqueous and organic aerosol droplets by ozone: a kinetic and product analysis approach using laser Raman tweezers

Faraday Discussions
Martin D KingBrian R Hughes

Abstract

The results of an experimental study into the oxidative degradation of proxies for atmospheric aerosol are presented. We demonstrate that the laser Raman tweezers method can be used successfully to obtain uptake coefficients for gaseous oxidants on individual aqueous and organic droplets, whilst the size and composition of the droplets is simultaneously followed. A laser tweezers system was used to trap individual droplets containing an unsaturated organic compound in either an aqueous or organic (alkane) solvent. The droplet was exposed to gas-phase ozone and the reaction kinetics and products followed using Raman spectroscopy. The reactions of three different organic compounds with ozone were studied: fumarate anions, benzoate anions and alpha-pinene. The fumarate and benzoate anions in aqueous solution were used to represent components of humic-like substances, HULIS; alpha-pinene in an alkane solvent was studied as a proxy for biogenic aerosol. The kinetic analysis shows that for these systems the diffusive transport and mass accommodation of ozone is relatively fast, and that liquid-phase diffusion and reaction are the rate determining steps. Uptake coefficients, gamma, were found to be (1.1 +/- 0.7) x 10(-5), (1.5 +/- 0.7...Continue Reading

References

Jan 14, 2003·Annual Review of Physical Chemistry·John H Seinfeld, James F Pankow
Apr 10, 2003·Chemical Society Reviews·Jonathan P Reid, Robert M Sayer
Jul 3, 2003·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·C Mund, R Zellner
Jul 3, 2003·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·C Mund, R Zellner
Mar 30, 2004·Environmental Science & Technology·Michael P TolockaMurray V Johnston
Sep 27, 2006·The Journal of Chemical Physics·Jariya BuajarernJonathan P Reid
Nov 9, 2006·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·David McGloin
Apr 1, 1997·Applied Optics·E Fällman, O Axner
Feb 15, 1989·Optics Letters·A BiswasR G Pinnick

❮ Previous
Next ❯

Citations

Dec 3, 2009·Physical Chemistry Chemical Physics : PCCP·Martin D KingArwel V Hughes
Jun 29, 2012·Chemical Society Reviews·Ulrich K KriegerJonathan P Reid
Feb 11, 2016·Physical Chemistry Chemical Physics : PCCP·Grégory DavidRuth Signorell
Jan 9, 2009·Electrophoresis·Alexandr Jonás, Pavel Zemánek
Jul 9, 2014·The Journal of Physical Chemistry. a·Benjamin J Dennis-SmitherJonathan P Reid
Jul 6, 2014·Reports on Progress in Physics·Rory M Power, Jonathan P Reid
Feb 1, 2016·Chemical Science·Frances H MarshallCari S Dutcher
Mar 20, 2021·The Journal of Physical Chemistry. a·Matus E DivekyRuth Signorell
May 18, 2021·Chemistry, an Asian Journal·Yuan-Pin ChangChun-Hu Chen

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.