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| Dissipation and Adsorption Behavior of the Insecticide Ethiprole on Various Cultivated Soils in China |
| LIU Xin-gang, DONG Feng-shou, XU Jun, YUAN Shan-kui , ZHENG Yong-quan |
1、Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture/Institute of Plant Protection, Chinese Academy of
Agricultural Sciences, Beijing 100193, P.R.China
2、Institute for the Control of Agrochemicals, Ministry of Agriculture, Beijing 100125, P.R.China |
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摘要 In this study, the hydrolysis of the insecticide ethiprole in buffered solutions at pH 4.0, 7.0 and 9.0, respectively, and the degradation and adsorption-desorption behaviors of ethiprole in five agricultural soil samples from China were investigated. The half-lives under anaerobic conditions were faster than that in the aerobic experiment. Ethiprole was relatively stable under both acidic and neutral conditions while it was readily hydrolyzed under alkaling condition. The sorption of ethiprole on five soils was well described by the linear and Freundlich equation and mainly governed by soil organic matter. The exothermic process of ethiprole adsorption can also be well explained by physical adsorption. A weak adsorption capacity was observed in all soils, which could readily lead to leaching problems.
Abstract In this study, the hydrolysis of the insecticide ethiprole in buffered solutions at pH 4.0, 7.0 and 9.0, respectively, and the degradation and adsorption-desorption behaviors of ethiprole in five agricultural soil samples from China were investigated. The half-lives under anaerobic conditions were faster than that in the aerobic experiment. Ethiprole was relatively stable under both acidic and neutral conditions while it was readily hydrolyzed under alkaling condition. The sorption of ethiprole on five soils was well described by the linear and Freundlich equation and mainly governed by soil organic matter. The exothermic process of ethiprole adsorption can also be well explained by physical adsorption. A weak adsorption capacity was observed in all soils, which could readily lead to leaching problems.
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Received: 04 July 2013
Accepted:
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| Fund: This work was supported by the National Natural Science Foundation of China (31272070). |
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Corresponding Authors:
ZHENG Yong-quan, Tel: +86-10-62815908, E-mail: zhengyongquan@ippcaas.cn
E-mail: zhengyongquan@ippcaas.cn
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| About author: LIU Xin-gang, Tel: +86-10-62815938, E-mail: xgliu@ippcaas.cn |
Cite this article:
LIU Xin-gang, DONG Feng-shou, XU Jun, YUAN Shan-kui , ZHENG Yong-quan.
2014.
Dissipation and Adsorption Behavior of the Insecticide Ethiprole on Various Cultivated Soils in China. Journal of Integrative Agriculture, 13(11): 2471-2478.
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