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. 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.

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

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10401 Organic chemistry
• Country of publisher: United States of America
• Confidentiality degree: is not subject to a state or trade secret
• 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
• Tags: AKR, rivok
• Tags: International impact, Reviewed

Abstract

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)