摘要
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。
The solvent extraction of samarium and yttrium using 8-hydroxyquinoline （HQ） -n-heptane in nitric acid medium was systematically investigated including the effects of various parameters, such as HQ concentration, NO3- concentration and pH value in equilibrated aqueous solution on the distribution ratio of rare earth. The distribution ratio increased with the increase of HQ concentration and pH value and decreased with the increase of NOf concentration. The formed complex was believed to be M （ NO3 ） Q （HQ） （OH） based on the results from slop method and charge balance. The complex extraction mechanism of samarium and yttrium by HQ in nitric acid was confirmed.
出处
《应用化学》
CAS
CSCD
北大核心
2012年第1期90-94,共5页
Chinese Journal of Applied Chemistry
基金
湖北省教育厅科学技术研究计划指导性项目(B20094007)
武汉市市属高等学校科学研究项目(2008K018)
关键词
羟基喹啉
钐
钇
萃取机理
平衡常数
hydroxyquinoline, samarium, yttrium, extraction mechanism, extraction constant
