含钾羟基磷灰石粉体的制备及其吸附性能研究  

Preparation and adsorption properties studies of potassium contained hydroxyapatite powders

作　　者：殷海荣[1] 李思媛[1] 乔荫颇[1] 刘盼[1] 李艳肖[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021

出　　处：《功能材料》2015年第12期12092-12096,共5页Journal of Functional Materials

基　　金：国家科技部国际科技合作计划资助项目(2009DFR50520);陕西省教育厅产业化资助项目(2013JC-22);陕西省咸阳市科技计划资助项目(2012K11-14)

摘　　要：采用化学沉淀法制备出Ca3(PO4)2粉体,经过高温煅烧得到α-Ca3(PO4)2粉体。将粉体投入到KOH溶液中,在120℃温度下水化不同时间,制备出含钾羟基磷灰石粉体,利用X射线衍射,透射电子显微镜进行分析表征。再将含钾羟基磷灰石粉体投入到Na F溶液中,研究粉体对F-的吸附性。实验结果表明,含钾羟基磷灰石粉体对氟离子的吸附采用Lagergren拟二级反应动力学方程拟合效果较好,吸附速率较快,吸附机制主要是通过离子交换作用。将吸附过程通过Langmuir/Freundlich吸附等温模型拟合,采用Langmuir模型拟合效果较好,静态吸附饱和量为31.55 mg/g。Ca3(PO4)2powder was synthesized by chemical precipitation. Then put powder into the crucible of Al2O3,after high temperature treatment obtain α-Ca3(PO4)2powder. Soaking into the KOH solution at 120 ℃,after different times,obtained potassium contained hydroxyapatite powders. Characterized by X-ray diffraction,transmission electron microscopy. Then put the powder into the Na F solution for adsorpting F-. Experimental results was described by pseudofirst-order kinetic model and second-order kinetic model. It was found that pseudo- second-order kinetic model was effective,show faster adsorption rate and adsorption mechanism mainly through ion exchange. Process of fluoride ion adsorption was described by Langmuir / Freundlich model,used Langmuir model fit better,static adsorption maximum capacity is 31. 55 mg / g.

关 键 词：αGCa3(PO4)2 含钾羟基磷灰石 吸附 离子交换 

分 类 号：TB331[一般工业技术—材料科学与工程]