Environmental Ice Photochemistry: Monochlorophenols

J 2003

Environmental Ice Photochemistry: Monochlorophenols

KLÁNOVÁ, Jana, Petr KLÁN, Jan NOSEK a Ivan HOLOUBEK

Základní údaje

Originální název

Environmental Ice Photochemistry: Monochlorophenols

Autoři

KLÁNOVÁ, Jana (203 Česká republika), Petr KLÁN (203 Česká republika, garant), Jan NOSEK (203 Česká republika) a Ivan HOLOUBEK (203 Česká republika)

Vydání

Environmental Science and Technology, Columbus, Ohio, USA, American Chemical Society, 2003, 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: 3.592

Kód RIV

RIV/00216224:14310/03:00008002

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000182223700014

Klíčová slova anglicky

ice; photochemistry; environmental; chlorophenol

Štítky

chlorophenol, environmental, ice, Photochemistry

Příznaky

Mezinárodní význam

Změněno: 9. 2. 2007 14:21, prof. RNDr. Petr Klán, Ph.D.

Anotace

V originále

Photolysis of 2- and 4-chlorophenol samples in water ice of the initial 10-4 to 10-2 mol l-1 concentrations is reported. Major phototransformations appeared to be based on the coupling reactions due to chlorophenol aggregation at the grain boundaries of the polycrystalline state. The main products, chlorobiphenyldiols, belong to the family of phenolic halogenated compounds (such as hydroxylated polychlorobiphenyls) that are known xenobiotics found in nature. No photosolvolysis products, that is products from intermolecular reactions between organic and water molecules, were observed at temperatures below -10 oC. Raising the temperature to -5 oC caused a moderate photosolvolytic activity in case of 4-chlorophenol (formation of hydroquinone), in contrast to 2-chlorophenol that was almost exclusively transformed into pyrocatechol. It is suggested that photosolvolysis above this temperature occurs in a quasi-liquid layer that covers the ice crystal surfaces. The results support our model in which significant amount of some persistent, bioaccumulative, and toxic compounds may be generated by photochemistry of primary pollutants in cold ecosystems and in the upper atmosphere, and may subsequently be released to the environment.

Návaznosti

GA205/02/0896, projekt VaV

Název: Fotochemie perzistentních organických látek v ledu a na jeho povrchu

Investor: Grantová agentura ČR, Fotochemie perzistentních organických látek v ledu a na jeho povrchu

Citovat

KLÁNOVÁ, Jana, Petr KLÁN, Jan NOSEK a Ivan HOLOUBEK. Environmental Ice Photochemistry: Monochlorophenols. Environmental Science and Technology. Columbus, Ohio, USA: American Chemical Society, 2003, roč. 37, č. 8, s. 1568-1574. ISSN 0013-936X.

@article{486115,
   author = {Klánová, Jana and Klán, Petr and Nosek, Jan and Holoubek, Ivan},
   article_location = {Columbus, Ohio, USA},
   article_number = {8},
   keywords = {ice; photochemistry; environmental; chlorophenol},
   language = {eng},
   issn = {0013-936X},
   journal = {Environmental Science and Technology},
   title = {Environmental Ice Photochemistry: Monochlorophenols},
   volume = {37},
   year = {2003}
}

TY  - JOUR
ID  - 486115
AU  - Klánová, Jana - Klán, Petr - Nosek, Jan - Holoubek, Ivan
PY  - 2003
TI  - Environmental Ice Photochemistry: Monochlorophenols
JF  - Environmental Science and Technology
VL  - 37
IS  - 8
SP  - 1568
EP  - 1568
PB  - American Chemical Society
SN  - 0013936X
KW  - ice
KW  - photochemistry
KW  - environmental
KW  - chlorophenol
N2  - Photolysis of 2- and 4-chlorophenol samples in water ice of the initial 10-4 to 10-2 mol l-1 concentrations is reported. Major phototransformations appeared to be based on the coupling reactions due to chlorophenol aggregation at the grain boundaries of the polycrystalline state. The main products, chlorobiphenyldiols, belong to the family of phenolic halogenated compounds (such as hydroxylated polychlorobiphenyls) that are known xenobiotics found in nature. No photosolvolysis products, that is products from intermolecular reactions between organic and water molecules, were observed at temperatures below -10 oC. Raising the temperature to -5 oC caused a moderate photosolvolytic activity in case of 4-chlorophenol (formation of hydroquinone), in contrast to 2-chlorophenol that was almost exclusively transformed into pyrocatechol. It is suggested that photosolvolysis above this temperature occurs in a quasi-liquid layer that covers the ice crystal surfaces. The results support our model in which significant amount of some persistent, bioaccumulative, and toxic compounds may be generated by photochemistry of primary pollutants in cold ecosystems and in the upper atmosphere, and may subsequently be released to the environment.
ER  -

KLÁNOVÁ, Jana, Petr KLÁN, Jan NOSEK a Ivan HOLOUBEK. Environmental Ice Photochemistry: Monochlorophenols. \textit{Environmental Science and Technology}. Columbus, Ohio, USA: American Chemical Society, 2003, roč.~37, č.~8, s.~1568-1574. ISSN~0013-936X.

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