کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
193359 | 459767 | 2007 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The assessment of removing strontium and cesium cations from aqueous solutions based on the combined methods of ionic liquid extraction and electrodeposition The assessment of removing strontium and cesium cations from aqueous solutions based on the combined methods of ionic liquid extraction and electrodeposition](/preview/png/193359.png)
The extraction of Sr2+ and Cs+ from aqueous solutions by using the ionophores dicyclohexano-18-crown-6 (DCH18C6) and calix[4]arene-bis(tert-octylbenzo-crown-6) (BOBCalixC6), respectively, was demonstrated in the hydrophobic, room-temperature ionic liquid (RTIL), tri-1-butylmethylammonium bis((trifluoromethyl)sulfonyl)imide (Bu3MeN-TFSI). The water contents of several hydrophobic ionic liquids and the absorption/desorption reversibility of oxygen and moisture in the Bu3MeN-TFSI ionic liquid were determined by electrochemical techniques. The relationship between the distribution coefficient, DM, and the concentration ratios of Cionophore,IL/Cmetal ion,aq were investigated. The values of DM increase with increasing the concentration ratios and they are also influenced with the counter ions of Sr2+ and Cs+ in the aqueous solutions. In the previous study, it was demonstrated that the Sr2+ and Cs+ cations in the Bu3MeN-TFSI ionic liquid could be coordinated by DCH18C6 and BOBCalixC6, respectively, and formed the DCH18C6·Sr2+ and BOBCalixC6·2Cs+ ions, which would be cathodically reduced to Sr- and Cs-amalgam at a mercury film electrode (MFE). In this study, the probability was evaluated if the Sr2+ and Cs+ cations extracted from the aqueous solutions can be really reduced to respective amalgam.
Journal: Electrochimica Acta - Volume 52, Issue 17, 5 May 2007, Pages 5484–5492