镧型阳离子交换树脂静态除氟实验研究

Study of Batch Defluoridation With Model-La Cation Exchange Resin

目的 制备镧型阳离子交换树脂 ,用于水中静态除氟。方法 用硝酸镧溶液浸泡氢型树脂 ,制备镧型树脂 ;利用氟与镧型树脂上的镧作用生成氟化物 ,静态法除去水中氟 ;除氟后的树脂用硝酸镧溶液浸泡再生 ,可反复用于水中除氟。结果 除氟容量 4.0 8mg g ,除氟有效率 97.80 %。通过再生 ,镧型树脂可使用 8个以上除氟周期。结论 镧型阳离子交换树脂是水中静态除氟的理想材料 ,特别适合于分散式静态除氟。

Objective Model-La cation exchange resin was transformed from strong acid cation exchange resin and was used for the defluoridation of drinking water. Methods The strong acid cation exchange resin was soaked in the La(NO 3) 3 solution. The F - in water was removed by model-La cation exchange resin under the batch condition because the F - was combined into fluoride with the La 3+ in the model-La cation exchange resin. The used resin was regenerated with the La(NO 3) 3 solution and was used to defluoridate many times. Results The defluoridation capacity of batch method was 4.08 mg/g and the efficiency of defluridation was 97.80%. The model-La cation exchange resin could be used for defluoridation for 8 times. Conclusion The model-La cation exchange resin is a novel material of defluoridation and is especially fit to home defluoridation.