| WEBER, Jan, Romana KURKOVÁ, Jana KLÁNOVÁ, Petr KLÁN a Crispin J. HALSALL. Photolytic degradation of methyl-parathion and fenitrothion in ice and water: Implications for cold environments. Environmental Pollution. UK: Elsevier, 2009, roč. 157, č. 12, s. 3308-3313. ISSN 0269-7491. |
Další formáty:
BibTeX
LaTeX
RIS
@article{852212,
author = {Weber, Jan and Kurková, Romana and Klánová, Jana and Klán, Petr and Halsall, Crispin J.},
article_location = {UK},
article_number = {12},
keywords = {Photochemistry; Pesticides; Ice},
language = {eng},
issn = {0269-7491},
journal = {Environmental Pollution},
title = {Photolytic degradation of methyl-parathion and fenitrothion in ice and water: Implications for cold environments},
volume = {157},
year = {2009}
}
TY - JOUR
ID - 852212
AU - Weber, Jan - Kurková, Romana - Klánová, Jana - Klán, Petr - Halsall, Crispin J.
PY - 2009
TI - Photolytic degradation of methyl-parathion and fenitrothion in ice and water: Implications for cold environments
JF - Environmental Pollution
VL - 157
IS - 12
SP - 3308-3313
EP - 3308-3313
PB - Elsevier
SN - 02697491
KW - Photochemistry
KW - Pesticides
KW - Ice
N2 - Here we investigate the photodegradation of structurally similar organophosphorus pesticides; methylparathion and fenitrothion in water (20 oC) and ice (-15 oC) under environmentally-relevant conditions with the aim of comparing these laboratory findings to limited field observations. Both compounds were found to be photolyzed more efficiently in ice than in aqueous solutions, with quantum yields of degradation being higher in ice than in water (fenitrothion > methyl-parathion). This rather surprising observation was attributed to the concentration effect caused by freezing the aqueous solutions. The major phototransformation products included the corresponding oxons (methyl-paraoxon and fenitroxon) and the nitrophenols (3-methyl-nitrophenol and nitrophenol) in both irradiated water and ice samples. The presence of oxons in ice following irradiation, demonstrates an additional formation mechanism of these toxicologically relevant compounds in cold environments, although further photodegradation of oxons in ice indicates that photochemistry of OPs might be an environmentally important sink in cold environments.
ER -
WEBER, Jan, Romana KURKOVÁ, Jana KLÁNOVÁ, Petr KLÁN a Crispin J. HALSALL. Photolytic degradation of methyl-parathion and fenitrothion in ice and water: Implications for cold environments. \textit{Environmental Pollution}. UK: Elsevier, 2009, roč.~157, č.~12, s.~3308-3313. ISSN~0269-7491.
|
