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[目的]探讨吡蚜酮在土壤中的吸附行为。[方法]采用批量平衡试验方法,研究了杀虫剂吡蚜酮在5种不同土壤中的吸附行为,并探讨了土壤理化性质对吡蚜酮在土壤中吸附的影响。[结果]吡蚜酮在不同性质的土壤中,吸附量不同。土壤pH是影响该农药在土壤中吸附的主要理化性质,吡蚜酮在5种土壤中的吸附能力大小顺序为河南褐土>湖南红壤>云南粘壤>山东褐土>湖南河潮土。Freundlich方程能较好地拟合吡蚜酮在土壤中的吸附等温线。吡蚜酮在5种供试土壤中的吸附常数(Kf)在6.2201～69.3760,自由能在14.70～21.12kJ/mol,表现为物理吸附过程。[结论]为评价吡蚜酮对土壤、地下水的危害的可能性提供了参考。
[Objective] The research aimed to explore the adsorption behavior of pymetrozine in soil. [Method] The batch experiment was used to study the adsorption behavior of pymetrozine in five different soils. The effects of soil physical and chemical properties on the adsorption of pymetrozine in soil were also discussed. [Result] Pymetrozine had different adsorption capacity in soils with different properties. Soil pH is the main physical and chemical properties that affect the adsorption of the pesticide in the soil. The order of adsorption capacity of pymetrozine in five soils is Henan Cinnamon soil> Hunan red soil> Yunnan clay> Shandong cinnamon soil> Hunan fluvial soil. Freundlich equation can fit well the adsorption isotherm of pymetrozine in soil. The adsorption constants (Kf) of pymetrozine in the five tested soils ranged from 6.2201 to 69.3760 and the free energies ranged from 14.70 to 21.12 kJ / mol, indicating the physical adsorption process. [Conclusion] This provided reference for evaluating the possibility of pymetrozine on the harm of soil and groundwater.