writer：Zhang, Q (Zhang, Qiang) [1] ; Zhou, YM (Zhou, Yuming) [1] ; Yao, QZ (Yao, Qingzhao) [1] ; Zhang, FL
keywords：Spheroidal magnesium oxideLanthanum modifiedDefluorination mechanismFluorine removal performanceAdsorption kineticsAdsorption thermodynamics
source：期刊
Issue time：2022年
Firstly, spherical magnesium oxide was synthesized by simple magnesium salt and specific reaction conditions. Then, lanthanum-modified spherical magnesium oxide (LSMO) was prepared by impregnation of lanthanum salt. The adsorption mechanism of the adsorbent was investigated by XRD, SEM, XPS, and FT-IR. Through the study of fluorine removal performance, for the solution with fluoride ion concentration of 10 mg center dot L-1, the fluorine removal efficiency of lanthanum-modified spherical magnesium oxide (15LSMO) (93.1%) with 15% impregnation mass ratio is higher than that of SMO (82.7%). In addition, in the pH range of 2-11 or in the presence of interfering ions, the fluoride removal effect of 15LSMO still meets the fluoride removal efficiency of more than 90%. The research enhanced the profound insights into the effect and mechanism of fluorine removal of lanthanum modified materials.