期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 66, 期 47, 页码 12471-12478出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.8b03424
关键词
spirotetramat; adsorption; desorption; soils; interaction mechanism
资金
- Key Research and Development Program of Jiangsu Province [BE2017344]
- Six Talent Peaks Project in Jiangsu Province [NY-101]
- Forestry Science and Technology Innovation and Extension Project of Jiangsu Forestry Bureau [LYKJ(2017)45]
Spirotetramat is a pesticide with bidirectional systemicity and can effectively control pests by inhibiting the biosynthesis of fatty acids. In this study, adsorption and desorption behaviors of spirotetramat in six soils and its interaction mechanism were studied using the batch equilibrium method and infrared radiation. The results showed that the adsorption and desorption behaviors of spirotetramat conformed to the Freundlich isotherm model. The values of adsorption capacities KF-ads ranged from 2.11 to 12.40, and the values of desorption capacities KF-des varied from 2.97 to 32.90. From the hysteresis coefficient, spirotetramat was easily desorbed from the test soils. The adsorption capacity of the soil to spirotetramat enhanced with an increasing temperature. Moreover, the changes in pH values and exogenous addition of humic acid and surfactant could also affect soil adsorption capacity, but for desorption, there was no correlation.
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