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Dynamics and mechanism of ultraviolet photolysis of atrazine on soil surface
Author(s) -
Gong Ajun,
Ye Changming,
Wang Xingjun,
Lei Zhifang,
Liu Jianmiao
Publication year - 2001
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.284
Subject(s) - atrazine , photodissociation , chemistry , triazine , photochemistry , reaction rate constant , environmental chemistry , pesticide , kinetics , organic chemistry , agronomy , physics , quantum mechanics , biology
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, N 2 , N 4 ‐diethyl‐6‐methyl‐1,3,5‐triazine‐2,4‐diamine and 6‐chloro‐ N 2 ‐propyl‐1,3,5‐triazine‐2,4‐diamine. The mechanism of the photolytic process is discussed. © 2001 Society of Chemical Industry