普鲁士蓝对Rb^+、Cs^+的吸附性能研究

Study on Adsorption Performance of Prussian Blue to Rb^+,Cs^+

用K4Fe(CN)6·3H2O和FeCl3·6H2O制备纯普鲁士蓝(PB)和负载量为55%普鲁士蓝/二氧化硅(PB/SiO2),考察了不同因素条件下(吸附时间、起始离子含量、c(H+)浓度、干扰阳离子K+和NH+4),纯PB对Rb+、Cs+混合模拟液的静态吸附情况。结果表明:随着吸附时间的增加,K d(Rb+)和K d(Cs+)增大,随着起始离子含量、c(H+)浓度、干扰阳离子K+和NH+4浓度的增大,Kd(Rb+)和Kd(Cs+)整体来说稍有下降,但变化不大。由于纯PB在水中易分散,不利于柱操作,故选取负载量为55%PB/SiO2进行柱实验,结果表明此柱对Rb+、Cs+显示出好的离子交换性能。

The preparation of pure Prussian blue （PB） and the loaded 55 % PB/SiO2 by using K4Fe （CN）6 · 3H20 and FeC13 · 6H20,was investigated at the condition of different factor （adsorption time,initial ion content,c （H ＋ ） concentration,interfere with cationic K ＋ and NH4 ）, pure PB to Rb ＋ , Cs ＋ hybrid simulation of the fluid static adsorption, the results showed that Ka （ Rb ＋ ） and Kd （ Cs ＋ ） increased with the increasing of adsorption time, as the initial ion content,c（ H ＋ ） concentration,interfere with cationic K ＋ and the increasing of the concentration of NH4＋ ,Kd （Rb ＋） and Ka（Cs ＋） as a whole were down a bit, but little change. Due to pure PB easily dispersed in water,which was unfavorable for post operation, so the selection of loaded 55% PB/SiO2 column experiments, the results showed that the column show good ion exchange performance to Rb ＋ , Cs ＋.