Elution of gold from activated carbon using supercritical carbon dioxide

被引：4
|
作者：
Otu, EO
机构：
[1] Division of Natural Sciences, Purchase College, State University of New York, Purchase
来源：
SEPARATION SCIENCE AND TECHNOLOGY | 1997年 / 32卷 / 06期
关键词：
D O I：
10.1080/01496399708000949
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A novel method for the desorption of gold from activated charcoal is reported. Ion pair solvation of sodium dicyanoaurate (I) (Na+ ... Au(CN)(2)(-)) by tributylphosphate facilitates the charge neutralization necessary for the elution of the ionic Au(CN)(2)(-) by the non-polar supercritical carbon dioxide. The method is sensitive to pressure and temperature, and the static (no CO2 now) period is more significant than the dynamic (CO2 flow) period. The presence of water is necessary to effect extraction.
引用
收藏
页码：1107 / 1114
页数：8
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