硅胶负载氧化锆的吸附除氟研究-《郑州大学学报(工学版)》

文章信息/Info

Title:: Study on adsorption and fluorine removal of silica gel-supported zirconia

作者:: 詹予忠; 朱小丽; 李玲玲; 等.; 郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001, 郑州大学,化工学院,河南,郑州,450001

Keywords:: Fluoride removal; silica gel loaded zirconia; adsorption kinetics; Adsorption isotherms

摘要:: 用静态吸附法研究了硅胶负载氧化锆的吸附除氟性能,考察了溶液pH、吸附剂投加量、初始浓度以及不同温度和不同初始浓度下吸附时间对吸附的影响.结果表明,溶液pH对吸附有很大影响,最大吸附的pH值为3～4.吸附速率可用拟二级动力学方程描述,200 min内可达到吸附平衡.吸附等温线符合Langmuir方程,计算的吸附平衡常数为1.31 L/mg,饱和吸附量为7.46 mg/g,表明该吸附剂对氟有较大的亲和力和高的饱和吸附量.

Abstract:: The adsorption and fluorine removal performance of silica gel-supported zirconia was studied by static adsorption method, and the effects of solution pH, adsorbent dosage, initial concentration, and adsorption time at different temperatures and initial concentrations on adsorption were investigated. The results show that the pH of the solution has a great influence on adsorption, and the pH value of the maximum adsorption is 3~4.The adsorption rate can be described by the quasi-secondary kinetic equation, and the adsorption equilibrium can be reached within 200 min. The adsorption isotherm conforms to the Langmuir equation, and the calculated adsorption equilibrium constant is 1.31 L/mg, and the saturated adsorption capacity is 7.46 mg/g, indicating that the adsorbent has a large affinity for fluorine and a high saturation adsorption capacity.