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对陕西几种土壤磷吸附动力学研究表明：在反应开始约３０ｍｉｎ内，溶液中磷浓度迅速降低，之后逐渐趋于稳定。因而，土壤磷吸附动力学可以用两个同时进行的反应来描述，第一个反应是二级反应（快速反应），是土壤对磷的表面吸附；第二个反应是一级反应（慢速反应），与磷酸根进入土壤颗粒内部点位的排列有关；利用吸附反应速率常数计算吸附活化能并进而求得活化焓（△Ｈ）、活化熵（△Ｓ）以及活化自由能（△Ｇ）等假热力学参数，通过讨论得出：过渡态理论应用于土壤磷吸附研究是有益的，有利于探讨土壤吸附磷的特征和本质
The kinetics of phosphorus adsorption on several soils in Shaanxi Province showed that the phosphorus concentration in the solution decreased rapidly within about 30min after the start of the reaction and then gradually stabilized. Therefore, the kinetics of soil phosphorus adsorption can be described by two simultaneous reactions. The first one is the second-order reaction (rapid reaction), which is the soil surface adsorption of phosphorus. The second one is the first-order reaction (△ H), activation entropy (△ S) and free energy of activation (△ S) were obtained by using the adsorption reaction rate constants to calculate the activation energy of adsorption G) and other pseudo-thermodynamic parameters. Through the discussion, it is concluded that the application of transition state theory to the study of phosphorus adsorption in soil is beneficial to the discussion of the characteristics and essence of phosphorus adsorption