新型复合无机离子交换剂磷锑酸——磷钼酸铵的合成与性能研究

本文研究了新型复合无机离子交换剂磷锑酸—磷钼酸铵（ＰＡＡ—ＡＭＰ）的制备和对１３７Ｃｓ＋的交换性能。这种交换剂成型好且稳定，对Ｃｓ＋有良好的选择性和较高的交换容量，与以前的四价金属磷酸盐类复合材料相比，它吸附Ｃｓ＋后可直接用浓度高的ＨＮＯ３洗脱下来，实现了低酸交换吸附，高酸淋洗再生的工艺要求，是一种性能优良的无机离子交换材料，可从放射性废液中分离和回收（１３７）Ｃｓ＋。

STUDY ON PREPARATION AND PROPERTIES OF NEW COMPLEX INORCANIC ION EXCHANGER(PAA-AMP)

New complex inorganic ion exchanger PAA-AMP is synthesised. Chemicalcomposition, structure and some ralated properties and complex mechanism of this ion exchanger are investigated by thermal analytical, electron microscopic, X-ray diffraction and chemical methods. It is found that some Mo atoms are replaced by Sb atoms and solid solution formed in the process of complex.The ion exchange behavior of PAA-AMP has been studied in detail. Results of column test indicated that the break-through capacity obtained from fifty tests for Cs in 0. 1 mol/L HNO3 solution is 0. 96 mmol/g, and unity percent of total Cs in the column can be eluted by 9BV of 10mol/L HNO3 eluent.