新型饮用水除氟材料Bio-F除氟机制研究  

ANALYSIS OF ADSORPTION MECHANISM OF DRINKING-WATER DEFLUORINATION MATERIAL Bio-F

作　　者：李腾[1] 魏妍[1] 朱迟[1] 杨娇艳[1] 赵良元[1] 王鸣涛[1] 杨劭[1] 

机构地区：[1]华中师范大学湖北省城市水环境生态学重点实验室,武汉430079

出　　处：《环境化学》2010年第4期705-709,共5页Environmental Chemistry

基　　金：国家水利部948项目(合同号200731)

摘　　要：采用了SEM、BET、FT-IR、XRD等现代分析测试方法,研究了Bio-F的表面微观结构及吸附氟离子机制.结果表明,Bio-F吸附氟离子后比表面积由12.411m2.g-1减少为10.692m2.g-1,平均孔容减少了0.004cm3.g-1,最可几孔径分布在1.88nm左右.Bio-F吸附氟离子的过程包括离子交换和吸附作用,吸附方式包括物理吸附和化学吸附,离子交换时材料与氟离子结合可能形成Ca10(PO4)5CO3(OH)F.The surface structure and fluoride adsorption mechanism of Bio-F were analyzed by using SEM,BET,FT-IR,and XRD. The results showed that BET surface area of Bio-F was reduced from 12.411m^2·g^-1 to 10.692m^2 ·g^-1 after F-adsorption. The average pore volume of Bio-F was 0.004 cm^3·g^-1and the most probable pore size was 1.88nm. The process of F-adsorption of Bio-F includes ion exchange and adsorption. TheF-adsorption process includes physical adsorption and chemical adsorption. Analysis by XRD suggested fluorine ion was possibly formed as Ca10 （PO4）5 CO3（OH）F on the surface of Bio-F by ion exchange.

关 键 词：Bio-F 除氟 吸附 

分 类 号：R123[医药卫生—环境卫生学]