核化学与放射化学
覈化學與放射化學
핵화학여방사화학
HE HUAXUE YU FANGSHE HUAXUE
2014年
2期
92-96
,共5页
李华%黄萍%张继红%万俊生
李華%黃萍%張繼紅%萬俊生
리화%황평%장계홍%만준생
中子活化%离子交换色层法%2-羟基异丁酸%铒%铥%镱
中子活化%離子交換色層法%2-羥基異丁痠%鉺%銩%鐿
중자활화%리자교환색층법%2-간기이정산%이%주%의
neutron activated%ion-exchange chromatography%2-hydroxyisobutyric acid%Er%Tm%Yb
利用西安脉冲堆中央垂直孔道作为中子源,研究了天然氧化铒用于171 Tm 生产的可行性,考察了靶样品组成和质量对中子活化生产率的影响；利用离子交换色层法,采用 Dowex50×8-400树脂作为分离介质,2-羟基异丁酸作为淋洗剂,研究了辐照产物中171 Tm 的分离条件,考察和优化了样品负载量、淋洗液酸度、树脂柱床高度以及温度等条件对分离效果的影响。实验结果显示：靶样品组成和质量对中子活化生产率影响不大,天然氧化铒可用于171 Tm 的生产；Er3+负载量、淋洗液酸度、树脂柱床高度以及温度等条件对 Yb3+、Tm3+和 Er3+分离效果都有较显著的影响；优化的离子交换色层分离条件为：Dowex50×8-400树脂,?1.4 cm×17.5 cm离子交换树脂床,温度25℃以上,0.1 mol/L 2-羟基异丁酸为淋洗剂,Er3+负载量25 mg,Yb3+、Tm3+淋洗酸度分别为 pH=4.00和pH=4.05；优化分离方法可实现Tm3+回收率高于95%,Tm3+中Yb3+和Er3+的去污因子均高于1000。
利用西安脈遲堆中央垂直孔道作為中子源,研究瞭天然氧化鉺用于171 Tm 生產的可行性,攷察瞭靶樣品組成和質量對中子活化生產率的影響；利用離子交換色層法,採用 Dowex50×8-400樹脂作為分離介質,2-羥基異丁痠作為淋洗劑,研究瞭輻照產物中171 Tm 的分離條件,攷察和優化瞭樣品負載量、淋洗液痠度、樹脂柱床高度以及溫度等條件對分離效果的影響。實驗結果顯示：靶樣品組成和質量對中子活化生產率影響不大,天然氧化鉺可用于171 Tm 的生產；Er3+負載量、淋洗液痠度、樹脂柱床高度以及溫度等條件對 Yb3+、Tm3+和 Er3+分離效果都有較顯著的影響；優化的離子交換色層分離條件為：Dowex50×8-400樹脂,?1.4 cm×17.5 cm離子交換樹脂床,溫度25℃以上,0.1 mol/L 2-羥基異丁痠為淋洗劑,Er3+負載量25 mg,Yb3+、Tm3+淋洗痠度分彆為 pH=4.00和pH=4.05；優化分離方法可實現Tm3+迴收率高于95%,Tm3+中Yb3+和Er3+的去汙因子均高于1000。
이용서안맥충퇴중앙수직공도작위중자원,연구료천연양화이용우171 Tm 생산적가행성,고찰료파양품조성화질량대중자활화생산솔적영향；이용리자교환색층법,채용 Dowex50×8-400수지작위분리개질,2-간기이정산작위림세제,연구료복조산물중171 Tm 적분리조건,고찰화우화료양품부재량、림세액산도、수지주상고도이급온도등조건대분리효과적영향。실험결과현시：파양품조성화질량대중자활화생산솔영향불대,천연양화이가용우171 Tm 적생산；Er3+부재량、림세액산도、수지주상고도이급온도등조건대 Yb3+、Tm3+화 Er3+분리효과도유교현저적영향；우화적리자교환색층분리조건위：Dowex50×8-400수지,?1.4 cm×17.5 cm리자교환수지상,온도25℃이상,0.1 mol/L 2-간기이정산위림세제,Er3+부재량25 mg,Yb3+、Tm3+림세산도분별위 pH=4.00화pH=4.05；우화분리방법가실현Tm3+회수솔고우95%,Tm3+중Yb3+화Er3+적거오인자균고우1000。
The possibility of neutron capture production of 171 Tm using natural erbium oxide as target material was investigated by irradiation in the middle hole of Xi’an pulsed reactor. The influence of isotope composition of erbium and amount of target material was investiga-ted.Ion-exchange chromatography method using Dowex50×8-400 and 2-hydroxyisobutyric acid (2-HIBA)was performed to separate Tm from the activated material.The influence of sample load,fluent pH,length of the resin bed and temperature on the separation was discussed.Experiment results show that,(1)the composition and the amount of the target material have little influence on the activated productivity of 171 Tm;(2)the sample load,the pH of fluent,the length of the resin bed and the temperature affect remarkably on the separation.The optimized separation condition is?1.4 cm×17.5 cm resin bed with 25 mg of Er3+ load,temperature higher than 25 ℃,and pH=4.00 and pH=4.05 as fluent pH of Yb3+ and Tm3+,separately.Under the optimized condition,the recovery of Tm is higher than 95%,and the decontamination factors of Tm3+ to Yb3+ and Er3+ are higher than 1 000.
