Kinetics of heterogeneous reactions of ozone with representative PAHs and an alkene at the air?ice interface at 258 and 188 K

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F14%3A00074345" target="_blank" >RIV/00216224:14310/14:00074345 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c3em00665d" target="_blank" >http://dx.doi.org/10.1039/c3em00665d</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c3em00665d" target="_blank" >10.1039/c3em00665d</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Kinetics of heterogeneous reactions of ozone with representative PAHs and an alkene at the air?ice interface at 258 and 188 K

Popis výsledku v původním jazyce

The kinetics of the reaction of an alkene (E-stilbene) and three polycyclic aromatic hydrocarbons (perylene, anthracene and fluoranthene), as examples of environmental pollutants, with ozone on the surface of ice grains (also called ?artificial snow?), produced by shock-freezing of aqueous solutions, was studied at submonolayer pollutant coverages (c = 1.5 x 10-8 to 3 x 10-10 mol kg-1) and two different temperatures (258 and 188 K). This work supports and extends our previous discovery of a remarkable increase in the apparent ozonation rates with decreasing temperature. The ozonation kinetic results were evaluated using the Langmuir?Hinshelwood model and, in one case, the Eley?Rideal kinetic model. It is shown that the apparent rate enhancement is related to the specific nature of the ice surface at different temperatures, which influences the availability of contaminants to gaseous ozone, and to inherent reactivities of the contaminants.

Název v anglickém jazyce

Kinetics of heterogeneous reactions of ozone with representative PAHs and an alkene at the air?ice interface at 258 and 188 K

Popis výsledku anglicky

The kinetics of the reaction of an alkene (E-stilbene) and three polycyclic aromatic hydrocarbons (perylene, anthracene and fluoranthene), as examples of environmental pollutants, with ozone on the surface of ice grains (also called ?artificial snow?), produced by shock-freezing of aqueous solutions, was studied at submonolayer pollutant coverages (c = 1.5 x 10-8 to 3 x 10-10 mol kg-1) and two different temperatures (258 and 188 K). This work supports and extends our previous discovery of a remarkable increase in the apparent ozonation rates with decreasing temperature. The ozonation kinetic results were evaluated using the Langmuir?Hinshelwood model and, in one case, the Eley?Rideal kinetic model. It is shown that the apparent rate enhancement is related to the specific nature of the ice surface at different temperatures, which influences the availability of contaminants to gaseous ozone, and to inherent reactivities of the contaminants.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CC - Organická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Environmental Science: Processes & Impacts

ISSN

2050-7887

e-ISSN

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Svazek periodika

16

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

770-776

Kód UT WoS článku

000333565000012

EID výsledku v databázi Scopus

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