几种焦磷杂多酸盐无机离子交换剂的制备及其对Cs＋的吸附性能

以焦磷酸钾、钼酸钠、氯化铁、氧氯化锆等为原材料，制备了焦磷钼酸锆（ZMPP）、焦磷氧酸锆（ZOPP）、焦磷钼酸铁（FMPP）3种焦磷杂酸盐无机离子交换剂，采用XRF，XRD，FT-IR，SEM对合成样品进行了表征，测定了合成样品对Cs＋的吸附性能，研究了合成样品的耐酸性。结果表明：ZMPP，ZOPP，FMPP为组成不定的无定形态物质，其中ZMPP，ZOPP呈箔状，FMPP呈凝胶状；ZMPP，ZOPP，FMPP三者对Cs＋均具有较好的吸附性，实验条件下，以常温合成的ZMPP-25，FMPP吸附性较好，两者的吸附量可达2．38 mmol／g和2．36 mmol／g；少量Mo元素的存在，对ZMPP-25，ZOPP吸附Cs＋的性能影响较大，前者较后者提高了约50％；3种交换剂的耐酸性从强到弱的顺序为ZMPP-25〉ZOPP〉FMPP。

The Preparation and Cesium Ion Pyrophosphoric Heteropolyacid Absorption Properties of Several Salt Inorganic Ion- exchangers

Three kinds of pyrophosphoric heteropolyacid salt inorganic ion - exchangers, including zirconyl molybdopyrophosphate （ZMPP）, zirconyl oxypyrophosphate （ZOPP） and ferric molybdopyrophosphate （FMPP） , were prepared using tetrapotassium diphosphate, sodium molybdate, ferric chloride and zirco nium oxyehloride as raw materials. The properties of synthesized samples were characterized by X - ray fluorescence （XRF） , X- ray diffraction （XRD）, fourier transform infrared spectroscopy （FTIR） and scanning electron microscope （SEM）. In addition, the cesium ion absorption properties and acid resist- ance of the synthesized samples were investigated as well. The results show that the ZMPP, ZOPP and FMPP were amorphous substances with uncertain compositions. The morphologies of the ZMPP and ZOPP were foil - like. The FMPP appeared to be the typical gel - like. The ZMPP, ZOPP and FMPP possessed excellent cesium ion absorption properties. The cesium ion were better under the room temperature synthesis condition. The cesium ion absorption capacities of ZMPP - 25 and FMPP were 2.38 mmol/g and 2.36 mmol/g, respectively. The existence of a small amount Mo element had great influence on the cesium ion absorption properties of ZMPP -25 and ZOPP. The former was about 50% higher than the latter. The acid resistance order of the three kinds of exchangers was as follows ： ZMPP - 25 〉 ZOPP 〉 FMPP.