无机水合氧化物对磷酸根的吸附行为  

Adsorption Behavior of Inorganic Hydrate - Oxide Adsorbent to Phosphates

作　　者：董庆洁[1] 邵仕香[1] 李乃瑄[1] 张弦[1] 

机构地区：[1]天津理工大学生物与化学工程学院,天津300191

出　　处：《海湖盐与化工》2006年第3期22-24,共3页Sea-Lake Salt and Chemical Industry

基　　金：天津市自然科学基金项目(项目编号023608111)

摘　　要：制备出一种新型的无机水合氧化物吸附剂,并用该氧化物对磷酸根水溶液进行吸附试验。实验分析了pH值、吸附温度和吸附时间对吸附容量的影响,同时也讨论了吸附过程相关的动力学、热力学和扩散速率。结果表明:该吸附过程为吸热吸附,它主要是以离子交换形式进行的。高温吸附与Langmuir等温吸附方程的拟合要优于低温吸附,高温下的吸附速率为一级动力学而低温吸附更趋于抛物扩散方程。A novel inorganic hydrate - oxide adsorbent was prepared and the adsorption of aqueous phosphate ions was measured. The influence of pH value, temperature and reaction time on adsorption content was examined. In addition, the kinetics, the thermodyamics and the diffusion rate of the phosphate adsorption were discussed. Results show that the adsorption is an endothermic reaction, which ion exchange is responsible largely for the removal of phosphate. The adsorption behavior at high temperature is better to obey Langmuir equation than that at low temperature. Thus the reaction is first - order at high temperature and the reaction is a parabola - like diffusion equation at low temperature.

关 键 词：水合氧化物 吸附剂 磷酸根 吸附性能 

分 类 号：X703[环境科学与工程—环境工程]