天然沸石对溶液中氨氮的吸附性能  

Adsorption Properties of Natural Zeolite to NH_4-N in Solution

作　　者：屠巍[1] 徐承天[1] 韩庆平[1] 陈邦林[1] 

机构地区：[1]华东师范大学化学系,上海200062

出　　处：《净水技术》2007年第1期10-13,共4页Water Purification Technology

摘　　要：实验测定了天然沸石对氨氮的动力学吸附曲线、热力学吸附等温线、吸附前后沸石颗粒界面电性质及红外谱图,得出以下结论:沸石吸附氨氮过程服从Langmuir方程式;15℃～35℃度时温度对吸附量的影响较小;吸附过程交换速率由液膜扩散和粒子扩散共同控制;证实沸石对水溶液中氨氮的吸附以离子交换为主。The dynamics adsorption curve, thermodynamics adsorption curve, interface electronic properties and infrared spectrums of zeolite before and after adsorption were determined .The results were attained as follow that the adsorption process of the zeolite to NH4-N can be described by the Langmuir equation, and the adsorption capacity of the zeolite was no more differences in the range of 15℃ to 35℃. Liquid membrane diffusion and particle diffusion commonly controlled the rate of ion-exchange. In addition, it was confirmed that the ion exchange was the major pattern for the adsorption of zeolite to NH4-N in solution.

关 键 词：沸石 氨氮吸附 沸石等电点 氨氮吸附动力学 

分 类 号：TQ424.1[化学工程]