凹凸棒土复合吸附剂对磷酸根吸附行为的研究  

Study on the Treatment of Water Containing Phosphates with Attapulgite Compound Adsorbents

作　　者：董庆洁[1] 邵仕香[1] 李乃瑄[1] 郭星[1] 孟欣[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：《硅酸盐通报》2006年第2期19-22,共4页Bulletin of the Chinese Ceramic Society

基　　金：天津市自然科学基金项目(023608111).

摘　　要：实验以凹凸棒土和氯化镁为原料,在高温下进行灼烧得到粒状的无机复合物。该复合物对水体中的磷具有很好的吸附性。用X射线和扫描电镜对吸附剂吸附前后的表面进行分析,阐述其吸附过程表面积的变化及吸附机理。结果表明:该吸附剂对磷酸根吸附的动力学服从Langmuir速率方程,温度升高加快吸附速率。在磷酸根初始浓度为100mg·g-1、吸附温度为20℃、pH为5.4时可获得最大吸附容量为34.8mg·g-1。The particulate inorganic adsorbent was obtained by reaction of attapulgite and MgCl3 at high temperature . The adsorbent has a good adsorptivity. The yield and mechanisms of phosphate removal were explained on the basis of analysis on the surface of the particle before and after adsorption by X-ray spectroscopy and SEM. In addition, adsorption kinetics follows Langmuir equation, the adsorption rate of phosphate was significantly influenced by temperature. The largest adsorptive capacity could be 34.8 mg·g^-1 at initial concentration of 50 mg·L^-1, adsorption temperalure 20℃, pH 5.4.

关 键 词：凹凸棒土 复合吸附剂 磷酸根 动力学 热力学 扫描电镜 

分 类 号：TQ330.383[化学工程—橡胶工业] O647.3[理学—物理化学]