CAJ | 학술논문

乏燃料后处理的高放废液分离过程中，发展新型分离材料实现对锶的高效萃取至关重要。合成了1，2交替构象的硫代杯[4]冠-4(TCACE)，利用FT-IR、1H NMR和MS对目标产物进行了表征。研究不同稀释剂对萃取的影响，优化得出CH2Cl2为稀释剂，在硝酸浓度为3 mol·L?1，有机相中硫代杯[4]冠-4浓度为1×10?3 mol·L?1，水相中Sr2+浓度为5×10?4 mol·L?1，萃取温度为25℃，萃取80 min条件下，平均传质系数为1.36×10?5 m·s?1， Sr2+的分配比为0.69。分析了不同条件对硫代杯[4]冠-4对 Sr2+的萃取影响，研究了萃取计量方程式，实验结果表明萃合物为{Sr(NO3)2}·{TCACE}。研究了TCACE对其他金属离子Mo6+、Ni2+、Ag+、Sn4+等的萃取效果，表明对Sr2+具有较好的选择性。
핍연료후처리적고방폐액분리과정중，발전신형분리재료실현대송적고효췌취지관중요。합성료1，2교체구상적류대배[4]관-4(TCACE)，이용FT-IR、1H NMR화MS대목표산물진행료표정。연구불동희석제대췌취적영향，우화득출CH2Cl2위희석제，재초산농도위3 mol·L?1，유궤상중류대배[4]관-4농도위1×10?3 mol·L?1，수상중Sr2+농도위5×10?4 mol·L?1，췌취온도위25℃，췌취80 min조건하，평균전질계수위1.36×10?5 m·s?1， Sr2+적분배비위0.69。분석료불동조건대류대배[4]관-4대 Sr2+적췌취영향，연구료췌취계량방정식，실험결과표명췌합물위{Sr(NO3)2}·{TCACE}。연구료TCACE대기타금속리자Mo6+、Ni2+、Ag+、Sn4+등적췌취효과，표명대Sr2+구유교호적선택성。
In the high-level radioactive waste liquid separation process of spent fuel reprocessing, new separation materials are of great significance for the efficient extraction of strontium. In the paper, 1, 2-alternate thiacalix[4]biscrowns 4 (TCACE) was synthesized by using calix[4]arene and triethylene glycol di(p-toluenesulfonate). TCACE was characterized by FT-IR, 1H NMR and MS. The influence of different diluents on extraction rate was studied, and CH2Cl2 was chosen as diluent by optimization. Extraction rate of Sr2+was excellent and average mass transfer coefficient was 1.36×10?5 m·s?1 under the conditions of CH2Cl2 as organic solvent, nitrate acid concentration was 3 mol·L?1, TCACE concentration was 1×10?3 mol·L?1, Sr2+concentration was 5×10?4 mol·L?1, extraction was conducted for 80 min and at 25℃. Different technological conditions on extraction for Sr2+ were studied. Furthermore, the extraction measurement equation was also studied. The extraction complex was{Sr(NO3)2}·{TCACE}as shown by experiment. The extraction effects for other metal ions Mo6+, Ni2+, Ag+, Sn4+with TCACE were also studied. It was found that TCACE showed excellent selectivity for Sr2+.