研究了8-羟基喹啉(HQ) -庚烷体系从硝酸介质中萃取钐、钇的行为.考察了HQ浓度、平衡水相pH值及NO3-离子浓度对稀土分配比的影响.研究结果表明,稀土萃取分配比随水相pH值、8-羟基喹啉浓度的增加而增大,随水相中NO3-浓度的增高而降低.根据斜率法及电荷平衡原理确定萃合物的组成为M( NO3) ·Q(HQ) (OH),HNO3体系中HQ萃取Sm3+、Y3+属络合机理.
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