Photolytic degradation of methyl-parathion and fenitrothion in ice and water: Implications for cold environments

WEBER, Jan, Romana KURKOVÁ, Jana KLÁNOVÁ, Petr KLÁN and Crispin J. HALSALL. Photolytic degradation of methyl-parathion and fenitrothion in ice and water: Implications for cold environments. Environmental Pollution. UK: Elsevier, 2009, vol. 157, No 12, p. 3308-3313. ISSN 0269-7491.

Basic information

• Original name: Photolytic degradation of methyl-parathion and fenitrothion in ice and water: Implications for cold environments
• Name in Czech: Photolytic degradation of methyl-parathion and fenitrothion in ice and water: Implications for cold environments
• Authors: WEBER, Jan (826 United Kingdom of Great Britain and Northern Ireland), Romana KURKOVÁ (203 Czech Republic), Jana KLÁNOVÁ (203 Czech Republic), Petr KLÁN (203 Czech Republic, guarantor) and Crispin J. HALSALL (826 United Kingdom of Great Britain and Northern Ireland).
• Edition: Environmental Pollution, UK, Elsevier, 2009, 0269-7491.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10401 Organic chemistry
• Country of publisher: United Kingdom of Great Britain and Northern Ireland
• Confidentiality degree: is not subject to a state or trade secret
• Impact factor: Impact factor: 3.426
• RIV identification code: RIV/00216224:14310/09:00037009
• Organization unit: Faculty of Science
• UT WoS: 000272334500017
• Keywords in English: Photochemistry; Pesticides; Ice
• Tags: International impact, Reviewed

Abstract

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.

Abstract (in Czech)

Článek popisuje studium degradací organofosforečných polutantů ve sněhu a ledu.

Links

• 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)