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 a Petr KLÁN

Základní údaje

Originální název

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

Autoři

KURKOVÁ, Romana (203 Česká republika, domácí), Debajyoti RAY (356 Indie, domácí), Dana NACHTIGALLOVÁ (203 Česká republika) a Petr KLÁN (203 Česká republika, garant, domácí)

Vydání

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

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10401 Organic chemistry

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 5.228

Kód RIV

RIV/00216224:14310/11:00049866

Organizační jednotka

Přírodovědecká fakulta

DOI

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

UT WoS

000289341300035

Klíčová slova česky

Fotochemie; led; sníh; dibenzylketon

Klíčová slova anglicky

Photochemistry; ice; snow; dibenzyl ketone

Štítky

AKR, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 1. 4. 2015 22:19, prof. RNDr. Petr Klán, Ph.D.

Anotace

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.

Návaznosti

ED0001/01/01, projekt VaV

Název: CETOCOEN

GAP503/10/0947, projekt VaV

Název: Důsledky fotochemické aktivity organických polutantů v polárních oblastech

Investor: Grantová agentura ČR, Důsledky fotochemické aktivity organických polutantů v polárních oblastech

MSM0021622412, záměr

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

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální , regionální a lokální úrovni

Citovat

KURKOVÁ, Romana, Debajyoti RAY, Dana NACHTIGALLOVÁ a 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, roč. 45, č. 8, s. 3430-3436. ISSN 0013-936X. Dostupné z: 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 a 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, roč.~45, č.~8, s.~3430-3436. ISSN~0013-936X. Dostupné z: https://dx.doi.org/10.1021/es104095g.

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