【摘要】 将聚合氯化铝与片状壳聚糖复合制备球状交联负载铝壳聚糖树脂,并研究其除氟性能。通过实验探讨吸附时间、氟初始浓度、树脂用量、pH等因素对树脂除氟效果的影响。研究发现,树脂对氟的吸附动力学规律能用Lagergren一级方程和Lagergren二级方程加以描述,并符合Freundlich吸附等温模型;在树脂用量100 mL/g、吸附时间12 h时,树脂对氟的去除率为80%左右,pH值影响较小,适用pH范围宽;树脂吸附性能稳定,可用NH3.H2O多次再生,除氟效率与原树脂相近。更多还原

【Abstract】 A type of spherical,cross-linked and Al-loaded chitosan resin was prepared with PAC and flake chitosan,and its adsorptive property for fluoride was studied.The adsorption efficiency was affected by adsorption time,initial concentration of the fluoride,amount of resin and pH.The Lagergren pseudo-first-order kinetics model and pseudo-second-order kinetics model were used to describe the adsorption process.It is found that the adsorption law of fluoride onto chitosan follows the Freundlich model very well,the adsorption efficiency of fluoride can be to about 80% at resin amount of 100 mL/g and adsorption time of 12 h,the effect of pH is not significant,adsorptive property of the resin is stable and can be regenerated many times by using NH3·H2O,the adsorption efficiency of fluoride is similar to the original resin.更多还原