Chemistry of Small Organic Molecules on Snow Grains: The
Applicability of Artificial Snow for Environmental Studies

J 2011

Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies

KURKOVÁ, Romana, Debajyoti RAY, Dana NACHTIGALLOVÁ and Petr KLÁN

Basic information

Original name

Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies

Authors

KURKOVÁ, Romana (203 Czech Republic, belonging to the institution), Debajyoti RAY (356 India, belonging to the institution), Dana NACHTIGALLOVÁ (203 Czech Republic) and Petr KLÁN (203 Czech Republic, guarantor, belonging to the institution)

Edition

Environmental Science & Technology, USA, The American Chemical Society, 2011, 0013-936X

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10401 Organic chemistry

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 5.228

RIV identification code

RIV/00216224:14310/11:00049866

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1021/es104095g

UT WoS

000289341300035

Keywords (in Czech)

Fotochemie; led; sníh; dibenzylketon

Keywords in English

Photochemistry; ice; snow; dibenzyl ketone

Abstract

V originále

The utilization of artificial snow for environmentally relevant (photo)chemical studies was systematically investigated. Contaminated snow samples were prepared by various methods: by shock freezing of the aqueous solutions sprayed into liquid nitrogen or inside a large walk-in cold chamber at –35 oC, or by adsorption of gaseous contaminants on the surface of artificially prepared pure or natural urban snow. The specific surface area of artificial snow grains produced in liquid nitrogen was determined using adsorption of valerophenone (400–440 cm2 g–1) in order to estimate the surface coverage by small hydrophobic organic contaminants. The dynamics of recombination/dissociation (cage effect) of benzyl radical pairs, photochemically produced from 4-methyldibenzyl ketone on the snow surface, was investigated. The initial ketone loading, c = 10(-6)–10(–8) mol kg(–1), only about 1–2 orders of magnitude higher than the contaminant concentrations commonly found in nature, was already well below monocoverage.

Links

ED0001/01/01, research and development project

Name: CETOCOEN

GAP503/10/0947, research and development project

Name: Důsledky fotochemické aktivity organických polutantů v polárních oblastech

Investor: Czech Science Foundation

MSM0021622412, plan (intention)

Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)

Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)

Citovat

KURKOVÁ, Romana, Debajyoti RAY, Dana NACHTIGALLOVÁ and Petr KLÁN. Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies. Environmental Science & Technology. USA: The American Chemical Society, 2011, vol. 45, No 8, p. 3430-3436. ISSN 0013-936X. Available from: https://dx.doi.org/10.1021/es104095g.

@article{945070,
   author = {Kurková, Romana and Ray, Debajyoti and Nachtigallová, Dana and Klán, Petr},
   article_location = {USA},
   article_number = {8},
   doi = {http://dx.doi.org/10.1021/es104095g},
   keywords = {Photochemistry; ice; snow; dibenzyl ketone},
   language = {eng},
   issn = {0013-936X},
   journal = {Environmental Science & Technology},
   title = {Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies},
   volume = {45},
   year = {2011}
}

TY  - JOUR
ID  - 945070
AU  - Kurková, Romana - Ray, Debajyoti - Nachtigallová, Dana - Klán, Petr
PY  - 2011
TI  - Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies
JF  - Environmental Science & Technology
VL  - 45
IS  - 8
SP  - 3430-3436
EP  - 3430-3436
PB  - The American Chemical Society
SN  - 0013936X
KW  - Photochemistry
KW  - ice
KW  - snow
KW  - dibenzyl ketone
N2  - The utilization of artificial snow for environmentally relevant (photo)chemical studies was systematically investigated. Contaminated snow samples were prepared by various methods: by shock freezing of the aqueous solutions sprayed into liquid nitrogen or inside a large walk-in cold chamber at –35 oC, or by adsorption of gaseous contaminants on the surface of artificially prepared pure or natural urban snow. The specific surface area of artificial snow grains produced in liquid nitrogen was determined using adsorption of valerophenone (400–440 cm2 g–1) in order to estimate the surface coverage by small hydrophobic organic contaminants. The dynamics of recombination/dissociation (cage effect) of benzyl radical pairs, photochemically produced from 4-methyldibenzyl ketone on the snow surface, was investigated. The initial ketone loading, c = 10(-6)–10(–8) mol kg(–1), only about 1–2 orders of magnitude higher than the contaminant concentrations commonly found in nature, was already well below monocoverage.
ER  -

KURKOVÁ, Romana, Debajyoti RAY, Dana NACHTIGALLOVÁ and Petr KLÁN. Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies. \textit{Environmental Science \&{} Technology}. USA: The American Chemical Society, 2011, vol.~45, No~8, p.~3430-3436. ISSN~0013-936X. Available from: https://dx.doi.org/10.1021/es104095g.

Detailed Information on Publication Record