本文采用溶剂热法合成了微孔结构的锆基金属-有机框架(MOFs)材料Zr-CAU-24,该材料比表面积为1610 m 2/g。对所合成的Zr-CAU-24进行了热重分析(TGA)和辐照稳定性测试,考察了接触时间、初始pH值等对Zr-CAU-24对Th(Ⅳ)和Ce(Ⅳ)吸附性能的影...本文采用溶剂热法合成了微孔结构的锆基金属-有机框架(MOFs)材料Zr-CAU-24,该材料比表面积为1610 m 2/g。对所合成的Zr-CAU-24进行了热重分析(TGA)和辐照稳定性测试,考察了接触时间、初始pH值等对Zr-CAU-24对Th(Ⅳ)和Ce(Ⅳ)吸附性能的影响,并探讨了Zr-CAU-24对Th(Ⅳ)和Ce(Ⅳ)吸附过程的动力学和热力学。结果表明:Zr-CAU-24具有良好的热稳定性和辐照稳定性;准二级动力学模型为Th(Ⅳ)和Ce(Ⅳ)在Zr-CAU-24上的吸附过程提供了很好的解释,即该过程为化学吸附过程;Zr-CAU-24活性位点分布均匀,为单层吸附;混合金属离子溶液吸附研究发现,Zr-CAU-24对Th(Ⅳ)和Ce(Ⅳ)具有吸附选择性。展开更多
The extraction of Zr(Ⅳ) from nitric acid solution with amido polands PAⅡ、PAⅤ [1] was studied.The effects of the concentration of Zr(Ⅳ) and HNO 3,salting out agent(NaNO 3) and extractant on the distribution ratios...The extraction of Zr(Ⅳ) from nitric acid solution with amido polands PAⅡ、PAⅤ [1] was studied.The effects of the concentration of Zr(Ⅳ) and HNO 3,salting out agent(NaNO 3) and extractant on the distribution ratios were observed,the results show that the extractant PAⅡ is satisfactory for the extraction of Zr(Ⅳ) but there appears a serious emergence of third phase when the concentration of salting out agent and the rate of the concentration of the extractant/Zr(Ⅳ) is over some range and PAⅤ is of disadvantage on the extraction of Zr(Ⅳ).展开更多
文摘本文采用溶剂热法合成了微孔结构的锆基金属-有机框架(MOFs)材料Zr-CAU-24,该材料比表面积为1610 m 2/g。对所合成的Zr-CAU-24进行了热重分析(TGA)和辐照稳定性测试,考察了接触时间、初始pH值等对Zr-CAU-24对Th(Ⅳ)和Ce(Ⅳ)吸附性能的影响,并探讨了Zr-CAU-24对Th(Ⅳ)和Ce(Ⅳ)吸附过程的动力学和热力学。结果表明:Zr-CAU-24具有良好的热稳定性和辐照稳定性;准二级动力学模型为Th(Ⅳ)和Ce(Ⅳ)在Zr-CAU-24上的吸附过程提供了很好的解释,即该过程为化学吸附过程;Zr-CAU-24活性位点分布均匀,为单层吸附;混合金属离子溶液吸附研究发现,Zr-CAU-24对Th(Ⅳ)和Ce(Ⅳ)具有吸附选择性。
文摘The extraction of Zr(Ⅳ) from nitric acid solution with amido polands PAⅡ、PAⅤ [1] was studied.The effects of the concentration of Zr(Ⅳ) and HNO 3,salting out agent(NaNO 3) and extractant on the distribution ratios were observed,the results show that the extractant PAⅡ is satisfactory for the extraction of Zr(Ⅳ) but there appears a serious emergence of third phase when the concentration of salting out agent and the rate of the concentration of the extractant/Zr(Ⅳ) is over some range and PAⅤ is of disadvantage on the extraction of Zr(Ⅳ).