Abstract:Powdered and spherical hydroxyapatite were prepared in the lab for the removal of fluorine from groundwater, in addition, character and removal effect were determined using infrared spectrometer, scanning electron microscopy instrument, X ray diffraction, X-ray photoelectron spectrometer and batch scale experiment. The results show that, powdered hydroxyapatite prepared in lab had high purity but relatively low crystallinity, while the prepared spherical hydroxyapatite is relatively regular, porous spherical particles with particle size about 1mm. Removal capacity of powdered hydroxyapatite and spherical hydroxyapatite to fluoride from groundwater were about 15.2mg/g and 7.5mg/g respectively, however, the removal process had great difference. Powdered hydroxyapatite could remove most fluorine in 30min, while the process of spherical hydroxyapatite to remove fluorine lasted longer time and needed an interval of more than 8h. The combined process of powdered and spherical hydroxyapatite could decrease the concentration of fluorine in groundwater to 0.8~0.9mg/L stably. In all, the combined process could be used to remove fluorine from groundwater.
刘成, 胡伟, 李俊林, 姜成浩, 陈卫. 用于地下水除氟的羟基磷灰石制备及其除氟效能[J]. 中国环境科学, 2014, 34(1): 58-64.
LIU Cheng, HU Wei, LI Jun-Lin, JIANG Cheng-Hao, CHEN Wei. Preparation of the hydroxyapatite to remove fluorine from groundwater and its removal performance. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(1): 58-64.