摘要
研究了在1～8mol/l HNO_3的水相中不同浓度的锆、钼和锆同时存在以及铀和镨等对TBP萃取铌的影响。结果表明:1.当1×10^(-8)mol/l<[Zr]<5×10^(-2)mol/l和[HNO_3]>4mol/l时,随着水相初始锆浓度增加,D_(Nb)增加;而[HNO_3]<4mol/1 HNO_3时,随着锆浓度增加,D_(Nb)减小。2.在水相中同时存在钼和锆会使D_(Nb)增加。在钼和锆的浓度小于1×10^(-2)mol/l的情况下,硝酸浓度为3mol/l时D_(Nb)最小。
The paper describes the behaviour of extraction of niobium with irradiatedTBP from different aqueous solutions, and washing of niobium in loading organicphase. The irradiated TBP bore the doses at 1×10~3～7.5×10~5 Gy. The effect ofmolybdenum and uranium and flourine on the extraction of niobum with irradiatedTBP is shown. It was observed that an interfacial crud has not relevance to D_(Nb)but niobium--95 adsorbs on the interfacial crud. HDBP causes increasing D_(Nb) in theextraction of niobium with irradiated TBP. There is an antisynergism between TBPand HDBP in extraction, it limits extraction of niobium with TBP irradiated. Mo-lybdenum in aqueous phase weakens the antisynergism between TBP and HDBP inextraction, so that molybdenum can promote that D_(Nb) increases with irradiated doseof TBP.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1991年第6期29-36,共8页
Atomic Energy Science and Technology
关键词
硝酸溶液
铌
溶济萃取
辐照
TBP
Irradiated TBP
Niobium
Molybdenum
Interfacial crud
Solvent extraction
Antisynergism
