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Fate of airborne pesticides: photochemical transformation of lindane and chlorothalonil

: Hüskes, R.; Palm, W.-U.

Becker, K.H.:
Tropospheric oxidation mechanisms. Final report
Luxembourg: Office for Official Publications of the European Communities, 1995 (Air pollution research report 54)
ISBN: 92-827-0080-1
Workshop LACTOZ-HALIPP <1994, Leipzig>
Conference Paper
Fraunhofer ITA ( ITEM) ()
air pollution; atmosphere; atmospheric chemistry; chlorothalonil; lindane; pesticide; photochemical degradation; photochemistry; physical chemistry; theoretical chemistry

In summer 1993 air samples were collected at Paine, Germany to determine the concentrations of lindane (gamma-hexachlorocyclohexane), alpha-hexachlorocyclohexane, chlorothalonil (2,4,5,6-tetrachloro-1,3-dicyanobenzene), and of possible transformation products. In all samples gamma-pentachlorocyclohexene and dechloro-chlorothalonil were detected. The good correlation between the concentrations of chlorothalonil and dechloro-chlorothalonil provides evidence for the photochemical transformation of chlorothalonil in the atmosphere. Additionally, laboratory measurements were carried out to estimate the photochemical lifetime of chlorothalonil.