Selective extraction of strontium with supercritical fluid carbon dioxide

被引：25
|
作者：
Wai, CM [1 ]
Kulyako, Y
Yak, HK
Chen, XY
Lee, SJ
机构：
[1] Univ Idaho, Dept Chem, Moscow, ID 83844 USA
[2] Russian Acad Sci, Vernadsky Inst Geochem & Analyt Chem, Moscow, Russia
来源：
CHEMICAL COMMUNICATIONS | 1999年 / 24期
关键词：
D O I：
10.1039/a904527i
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Strontium (Sr2+) can be selectively extracted from aqueous solutions into supercritical fluid CO2 at 60 degrees C and 100 atm with dicyclohexano-18-crown-6 (DC18C6) using CF3(CF2)(6)CO2- (PFOA(-)) or CF3(CF2)(6)CF2SO3- (PFOSA(-)) as a counter anion; at a mole ratio of Sr2+ : DC18C6 : PFOA(-) = 1:10:50, the extraction of Sr (5.6 x 10(-5) M) from water at pH 3 is near quantitative whereas Ca2+ and Mg2+ at equal concentration are only extracted to a level of 7 and 1%, respectively; PFOSA(-) is an effective counter anion for selective extraction of Sr2+ from 1.3 M HNO3 with DC18C6 in supercritical CO2.
引用
收藏
页码：2533 / 2534
页数：2
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