碳羟基磷灰石的合成及其对F^-的吸附  

Removal of F^- from Aqueous Solutions by Nano-Carbonate-Hydroxylapatite

作　　者：马先慧[1] 赵金高[1] 吴柳明[1] 

机构地区：[1]济南大学资源与环境学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2013年第1期71-74,共4页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金(20877035)

摘　　要：利用X射线衍射对溶胶凝胶法合成的纳米碳羟基磷灰石(n-CHAP)样品进行表征。考察溶液pH值、反应时间和氟离子(F-)的初始浓度对n-CHAP吸附牙膏中F-的影响,探讨其反应机理。结果表明:F-的去除主要是通过静电吸引和离子交换作用实现;Langmuir吸附等温线模型与实验数据的拟合度较高;在180 min时吸附达到平衡,F-在n-CHAP的吸附动力学过程符合拟二级动力学方程;使用n-CHAP处理含氟工业废水,除氟效率达92.0%。Nano-carbonate-hydroxylapatite(n-CHAP)synthesized by sol-gel method was characterized by X-ray diffraction.The influence of various parameters,including pH value of the solution,initial concentration of F-and contact time,on the adsorption of F-onto n-CHAP was investigated,and the adsorption mechanism was discussed.Experimental results show that the removal of F-is mainly due to electrostatic attraction and ion exchange;Langmuir isothermal adsorption can be used to describe the experimental data;the equilibrium can be reached in 180 min and the pseudo-second-order model fits well to the adsorption kinetics.Processing fluorinated industrial wastewater by n-CHAP,the removal efficiency can reach up to 92.0%.

关 键 词：纳米碳羟基磷灰石 氟离子 吸附 

分 类 号：X703[环境科学与工程—环境工程]