硅酸盐通报2017，Vol.36Issue(8)：2659-2667,9.
磁性羟基磷灰石的制备及其除氟性能研究
Fabrication of Magnetic Hydroxyapatite and Its Property for Defluoidation
摘要
Abstract
Fluoride above a permissible level (>1.0 mg/L) in drinking water has serious health effects on human beings.Ferroferric oxide/hydroxyapatite composites nanoparticles (magnetic hydroxyapatite) were prepared by the in-situ co-precipitation method mixed with ferroferric oxide.The magnetic HAP had magnetism, which can separate and recycle by the ordinary magnets.Current results show that the optimal experimental conditions are happened in 60 ℃ of reaction temperature, 1 h of reaction time, 25 ℃ of aging temperature and 12 h of aging time, 0.08 g dosages of ferroferric oxide.Magnetic hydroxyapatite is used to remove fluoride under different conditions and its defluoridation performance is compared with that of hydroxyapatite.The adsorption process is fitted better by the Langmuir model with a maximum fluoride adsorption capacity (13.70 mg/g), indicating that the interaction between fluoride and magnetic HAP is monolayer absorption process.The negative values of ΔG0 and positive values of ΔH0 revealed that the adsorption is a spontaneous and endothermic reaction.The pseudo-second-order kinetic model fitted better for fluoride adsorption by magnetic HAP.The adsorption efficiency of magnetic HAP can still maintain above 85％ after recycling four times.High adsorption and recycling performance suggest that magnetic HAP can be used as an effective and reusable defluoridation adsorbent.关键词
羟基磷灰石/磁性/除氟Key words
hydroxyapatite/magnetic/defluoridation分类
资源环境引用本文复制引用
穆寄林,陈维俱,林皓,胡家朋,刘瑞来,饶瑞晔..磁性羟基磷灰石的制备及其除氟性能研究[J].硅酸盐通报,2017,36(8):2659-2667,9.基金项目
国家自然科学基金(51406141) （51406141）
福建省教育厅项目(JZ160333,JB14105) （JZ160333,JB14105）
国家大学生创新性实验(201710397014,201610397031) （201710397014,201610397031）
武夷学院引进人才(YJ201501,YJ201704) （YJ201501,YJ201704）
