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Vol. 26 No. 10 (2014): Vol 26 Issue 10

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Hydrolysis and Photodegradation of Trifloxystrobin in Aqueous Solution

https://doi.org/10.14233/ajchem.2014.15812
H.J. Liu
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Haidian District, Beijing 100085, P.R. China
X. Zhang
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Haidian District, Beijing 100085, P.R. China
H.L. Wang
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Haidian District, Beijing 100085, P.R. China
B.Y. Guo
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Haidian District, Beijing 100085, P.R. China
L. Zheng
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Haidian District, Beijing 100085, P.R. China
J.Z.H. Li
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Haidian District, Beijing 100085, P.R. China

Corresponding Author(s) : B.Y. Guo

huijunliu78@163.com

Asian Journal of Chemistry, Vol. 26 No. 10 (2014): Vol 26 Issue 10

Abstract

Hydrolysis of trifloxystrobin was investigated in pH 4-10 aqueous solutions at 25, 40 and 50 °C. Its photochemical experiments in acidic, neutral, alkaline solutions and 1-10 mg/L humic acid solutions were conducted. Trifloxystrobin hydrolytic rate was first-order with respect to hydroxide ion concentration. For each 10 temperature rising, the rate constant for hydrolysis increased 2-4 times. The photolytic T1/2 of trifloxystrobin at pH 4, 7 and 9 was 13.0, 11.9 and 4.3 h, respectively. In the 1-10 mg/L humic acid solutions, the photodegradation rate constants corrected for light screening of trifloxystrbin were 0.0592-0.0577 h-1, basically decreasing with the humic acid concentration increasing. It was concluded that in the aqueous solution, the key nucleophilic reaction partner was hydroxyl ions. Raise of temperature could accerlate hydrolysis of trifloxystrobin. The hydrolysis could accelerate the photolysis of trifloxystrobin and light screening had an effect on the photodegradation rate constants of trifloxystrobin.

Keywords

Trifloxystrobin Hydrolysis Photolysis
Liu, H., Zhang, X., Wang, H., Guo, B., Zheng, L., & Li, J. (2014). Hydrolysis and Photodegradation of Trifloxystrobin in Aqueous Solution. Asian Journal of Chemistry, 26(10), 2834–2838. https://doi.org/10.14233/ajchem.2014.15812
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