PHASE BEHAVIOR AND REVERSE MICELLE FORMATION IN SUPERCRITICAL CO2 WITH DTAB AND F-PENTANOL FOR DECONTAMINATION OF RADIOACTIVE WASTES

被引：0
作者：
Kurahashi, Kensuke [1 ]
Tomioka, Osamu [1 ]
Meguro, Yoshihiro [1 ]
机构：
[1] Japan Atom Energy Agcy, Nucl Cycle Backend Directorate, Radioact Waste Treatment Technol Dev Grp, Tokai, Ibaraki 3191195, Japan
来源：
PROCEEDINGS OF THE 13TH INTERNATIONAL CONFERENCE ON ENVIRONMENTAL REMEDIATION AND RADIOACTIVE WASTE MANAGEMENT, 2010, VOL 1 | 2011年
关键词：
Decontamination Process; Supercritical CO(2); Reverse Micelles; CARBON-DIOXIDE MICROEMULSIONS; SURFACTANT; WATER; SOLUBILIZATION; AOT; SPECTROSCOPY; ENVIRONMENT; SYSTEMS;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
To develop a metal separation method using supercritical CO(2) (scCO(2)) solvent for the decontamination process of radioactive wastes, the reverse micelle formation in scCO(2) was investigated. Dodecyltrimethylammonium bromide (DTAB) as a surfactant to form the reverse micelles and 2,2,3,3,4,4,5,5-octafluoro-I-pentanol (F-pentanol) as a modifier to increase the solubility of DTAB into scCO(2) were used. The reverse micelles could be formed by using 0.02 mol/dm(3) DTAB and 0.45 mol/dm(3) F-pentanol. A water concentration dissolved in scCO(2) was increased with an increase of pressure, and 0.42 mol/dm(3) water, which was 3 times larger than that in the neat CO(2), could be dissolved in scCO(2) at 38 MPa. Moreover, 0.1 mol/dm(3) HNO(3) could dissolve at the same pressure as water On the other hand, it was found that the solubility of water at outside of reverse micelles increased with F-pentanol. The ratio of water and F-pen tanol affected the phase behavior of water in scCO(2).
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页码：217 / 220
页数：4
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