CAJ | 학술논문

在Na2O-Al2O3-CaO-TiO2-P2O5体系中通过控制结晶合成了多孔吸附剂Na1.6Al0.6Ti1.4(PO4)3(NATP)。XRD分析表明，合成的玻璃体会弥散结晶为NATP和Ca9Al(PO4)7两相；通过酸浸可将Ca9Al(PO4)7相溶出，从而使主相NATP中留下大量孔道。实验研究了平衡时间、溶液pH和Na+浓度对吸附剂离子交换性能的影响。吸附动力学和平衡热力学研究表明，吸附过程可以很好地用准二级动力学方程和 Langmuir 等温方程进行描述。此外，在工业钨酸铵溶液中深度除钠的实验表明，除钠率高于97%，且循环实验表明该吸附剂具备良好的循环性能。
재Na2O-Al2O3-CaO-TiO2-P2O5체계중통과공제결정합성료다공흡부제Na1.6Al0.6Ti1.4(PO4)3(NATP)。XRD분석표명，합성적파리체회미산결정위NATP화Ca9Al(PO4)7량상；통과산침가장Ca9Al(PO4)7상용출，종이사주상NATP중류하대량공도。실험연구료평형시간、용액pH화Na+농도대흡부제리자교환성능적영향。흡부동역학화평형열역학연구표명，흡부과정가이흔호지용준이급동역학방정화 Langmuir 등온방정진행묘술。차외，재공업오산안용액중심도제납적실험표명，제납솔고우97%，차순배실험표명해흡부제구비량호적순배성능。
An adsorbent, Na1.6Al0.6Ti1.4(PO4)3 (or NATP), was prepared by controlled crystallization of glasses in the Na2O-Al2O3-CaO-TiO2-P2O5 system. The crystalline phases characterized by X-ray diffraction (XRD) show that the sample glasses crystallizes into two phases, i.e. NATP and Ca9Al(PO4)7, while the Ca9Al(PO4)7 phase can be leached selectively with HCl, leaving a massive number of pores in the material. Through the experimental research, the effects of contact time, solution pH, and the initial concentration of Na+on the cation exchange properties were investigated. The batch sorption kinetics and equilibria can be described by Pseudo-second-order kinetic equations and Langmuir isotherm equations respectively. Furthermore, the experiments with an industrial solution show that the removal rate of sodium from industrial (NH4)2WO4 is higher than 97%. Cycle experiment also shows that the NATP has a good cyclic performance.