title: Dynamics and mechanism of ultraviolet photolysis of atrazine on soil surface.
abstract: The photolysis of atrazine in the soil surface under UV light and the factors affecting this has been studied. A rate constant of 0.09-0.17 min-1, photolytic depth of 0.1-0.3 mm and half-life of 4-8 min were determined. The results show that soil granularity, pH, humidity, organic content, humic acid and surface-active agents could affect the photolysis of atrazine in soil. GC-MS showed three photolytic products: 1-sec-butyl-4,4-diethyl-1-tetrazene, N2,N4-diethyl-6-methyl-1,3,5-triazine-2,4-diamine and 6-chloro-N2-propyl-1,3,5-triazine-2,4-diamine. The mechanism of the photolytic process is discussed.
authors.affiliation: Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, Beijing 100 085, People's Republic of China.
authors.forename: A
authors.initials: A
authors.lastname: Gong
authors.forename: C
authors.initials: C
authors.lastname: Ye
authors.forename: X
authors.initials: X
authors.lastname: Wang
authors.forename: Z
authors.initials: Z
authors.lastname: Lei
authors.forename: J
authors.initials: J
authors.lastname: Liu
mesh_terms: D001280:Atrazine / Q000737:chemistry*; D001557:Benzenesulfonates / Q000737:chemistry; D001673:Biodegradation, Environmental; D008401:Gas Chromatography-Mass Spectrometry; D006540:Herbicides / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D010782:Photolysis; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000378:metabolism*; D013501:Surface-Active Agents / Q000737:chemistry; D014466:Ultraviolet Rays; D014867:Water
chemical_list: D001557:Benzenesulfonates; D006540:Herbicides; D012987:Soil; D012989:Soil Pollutants; D013501:Surface-Active Agents; D014867:Water; C001114:dodecylbenzenesulfonic acid; D001280:Atrazine