摘要
研究了Ｌａ（Ⅲ）、Ｕ（Ⅵ）等金属离子在聚乙二醇２０００（ＰＥＧ）硫酸钠偶氮氯膦Ⅲ（ＣＰＡⅢ）双水相体系中的萃取行为及存在形态。结果表明，在ｐＨ４．０～６．５的ＨＡｃＮａＡｃ缓冲溶液中，Ｌａ（Ⅲ）、Ｕ（Ⅵ）几乎被ＰＥＧ相全部萃取，而Ｃｏ（Ⅱ）基本上不被萃取，可实现Ｌａ（Ⅲ）与Ｃｏ（Ⅱ）及Ｕ（Ⅵ）与Ｃｏ（Ⅱ）混合离子的定量分离。经吸收光谱、摩尔比、连续浓度变换法、加入表面活性剂等试验表明，在萃取相中Ｌａ（Ⅲ）。
The extraction behaviour and existing form of La() and U() ions were investigated in polyethylene glycol 2000 (PEG)sodium sulfatechlorophosphonazo (CPA) biaqueous phase system. Experimental results show that La() and U() were almost completely extracted in PEG phase while Co() was not extracted. Quantitative separation of La()Co() and U()Co() were carried out. At the same time, by means of absorption spectra, changing molarratio and adding different surfactants, it is observed that complexes of La() and U() with chlorophosphonazo are anionic complexes in which the ratio of La() and U() to chlorophosphonazo are 12 in PEG phase.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
1999年第4期258-260,共3页
Chinese Journal of Rare Metals
关键词
聚乙二醇
偶氮氯膦Ⅲ
镧
铀
钴
萃取
分离
Polyethylene glycol, Chlorophosphonazo , Lanthanum, Uranium, Cobalt
