几种土壤氟吸附动力学研究  

Kinetics of Fluorine Adsorption in Several Soils

作　　者：魏志远[1] 黎成厚[2] 漆智平[1] 

机构地区：[1]中国热带农业科学院热带作物品种资源研究所,海南儋州571737 [2]贵州大学生物与环境科学学院,贵州贵阳550025

出　　处：《土壤通报》2006年第4期720-722,共3页Chinese Journal of Soil Science

基　　金：科技基础性工作和社会公益研究专项(2004DIB3J073)

摘　　要：采用平衡法对我国几种土壤氟吸附的动力学过程进行了研究。结果表明,不同土壤氟吸附的动力学参数差异很大,黄壤的最大吸附量最高,棕壤最低,棕壤的平衡时间最短,石灰土的平衡时间最长。不同土壤的氟吸附动力学参数与土壤理化性质有很大相关性。供试土壤的氟吸附动力学过程用双常数方程和E lovich方程描述获得了良好的拟合效果。而一级动力学方程和二级动力学方程都不适合土壤氟吸附动力学过程的描述。不同土壤的k值和β值证明黄壤较其他土壤吸附速率大,对加入土壤中氟的缓冲性大。The kinetics of fluorine adsorption in several soils was studied by using the balance method. The results showed that the kinetics parameters of the soils studied were of great difference, the maximum adsorption quantity was highest in the yellow soil and was lowest in the brown soil. The time reaching kinetics balance was shortest in the brown soil and was longest in the calcareous soil. The kinetics parameters were greatly related to the physical and chemical properties of the soils. The process of the kinetics of the fluorine adsorption in studied soils can be well described with the models of Elovich and double constants. The models of first-order grade and second-order grade can not describe the kinetics of fluorine adsorption appropriately in soils studied. According to k and β value ,the biggest adsorption speeds and buffer capacity of added fluorine were all found in the yellow soil.

关 键 词：土壤 氟 吸附 动力学 

分 类 号：S153.2[农业科学—土壤学]