The characteristies of K+ adsorbing-desorbing kinetics of five loessial soils were studied by the liquid flow technique. The results indicated that:①K+ adsorption and desorption equilibrated in 16-24 and 24-60 min, respectively, and the time and the capacity of K+ equilibrium adsorption were closely related with soil clay content and CEC;②there was a linear relationship between the K+ adsorbing-desorbing velocity and the reaction time lnt, and the slop of reaction velocity regression equation and K+ desorbing percentage regression equation, the original reaction velocity and the original desorbing percentage were closely related with soil clay and CEC;③First-order and Elovich equations were the best modles for K+ adsorption and desorption, respectively;④it is demonstrated that there were dif ferent energy level sites of K+ adsorption at the surface of soil colloid by the fast, medium and slow reactions of K+ adsorbing-desorbing;and ⑤the K+ adsorption and desorption were controlled by the diffussion process.
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薛泉宏,尉庆丰,李宝安,赵翀.黄土性土壤K+吸附、解吸动力学研究[J].土壤学报,1997,34(2):113-122. DOI:10.11766/trxb199403300201 Xue Quanhong, Wei Qingfeng, Li Baoan, Zhao Chong. STUDY ON K+ ADSORBING-DESORBING KINETICS OF LOESSIAL SOIL[J]. Acta Pedologica Sinica,1997,34(2):113-122.