论文部分内容阅读
[目的]明确氯氟氰菊酯、联苯菊酯和高效氯氰菊酯在沙土、壤土和水稻土中的吸附特性。[方法]试验采用振荡平衡法和气相色谱法进行研究。[结果]得到3种农药在不同土壤中的吸附方程,符合Freundlich方程;氯氟氰菊酯、联苯菊酯和高效氯氰菊酯在沙土、壤土和水稻土中的吸附系数分别为71.38、134.63、181.77、78.26、199.34、239.13、57.18、222.53、603.72,吸附特性等级为易吸附或较易吸附,平均吸附自由能绝对值范围为18.19~22.03,属于物理吸附。[结论]3种农药在不同土壤中都具有较强的吸附能力。
[Objective] The research aimed to clarify the adsorption characteristics of cyhalothrin, bifenthrin and beta-cypermethrin in sandy soil, loamy soil and paddy soil. [Method] The experiment was conducted by oscillating balance method and gas chromatography. [Result] The adsorption equations of three kinds of pesticides in different soils were obtained and accorded with Freundlich equation. The adsorption coefficients of cyhalothrin, bifenthrin and beta-cypermethrin in sandy soil, loamy soil and paddy soil were 71.38, 134.63 and 181.77 , 78.26,199.34,239.13,57.18,222.53,603.72, the adsorption characteristics of the grade easy to adsorb or more easily adsorbed, the average absolute value of free energy adsorption range 18.19 ~ 22.03, are physical adsorption. [Conclusion] The three kinds of pesticides have strong adsorption capacity in different soils.