Journal of Industrial and Engineering Chemistry, Vol.16, No.3, 350-354, May, 2010
Extraction of lanthanide ions from aqueous solution by bis(2-ethylhexyl)phosphoric acid with room-temperature ionic liquids
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Extractions of five kinds of lanthanide metal ions by bis(2-ethylhexyl)phosphoric acid (DEHPA) with [1-Cn-3-methylimidazolium][PF6](Cn = C2, C4) or [1-butyl-4-methylpyridinium][PF6] were carried out under various DEHPA and HNO3 concentrations from 0 to 1 M and under different temperature conditions from 298 to 333 K. These results were compared with those using the conventional organic solvent, hexane, in terms of their distribution coefficient values. Under all of the conditions in this study, the ionic liquid system shows more than three times greater extractability for lanthanide compared to when hexane was used. The distribution coefficient of lanthanide ions decreased as the length of the alkyl chain increased from the ethyl to the butyl. In addition, the imidazolium cation generally shows a higher distribution coefficient compared to the pyridinium cation in an ionic liquid. The concentration ratio of lanthanides and DEHPA resulted in an extraction affinity transition for lanthanides. Also evaluated in this study were issues related to the selectivity associated with the lanthanide mixture and the dependency of the ionic radius during lanthanide extraction.
- Carleson TE, Chipman NA, Wai CM, Separation Techniques in Nuclear Waste Management, CRC Press, Boca Raton (1996)
- Ramakul P, Supajaroon T, Prapasawat T, Pancharoen U, Lothongkum AW, J. Ind. Eng. Chem., 15(2), 224 (2009)
- Joung SN, Yoon SJ, Kim SY, Yoo KP, J. Supercrit. Fluids, 18(2), 157 (2000)
- Yamada D, Murai T, Moritani K, Sasaki T, Takagi I, Moriyama H, Kinoshita K, Yamana H, J. Alloy Compd., 444, 557 (2007)
- Jia Q, Tong SS, Li ZY, Zhou WH, Li HF, Meng SL, Sep. Purif. Technol., 64(3), 345 (2009)
- Ahmed M, Ahmed S, Saeed MM, Iqbal MZ, J. Radioanal. Nucl. Chem., 220(2), 207 (1997)
- Gupta B, Malik P, Deep A, J. Radioanal. Nucl. Chem., 251(3), 451 (2002)
- Rogers RD, Seddon KR, Volkov S, Green Industrial Application of Ionic Liquid, Kluwer, Dordrecht, NATO Science Ser. 92 (2002)
- Lee JS, Bae JY, Lee H, Quan ND, Kim HS, Kim H, J. Ind. Eng. Chem., 10(7), 1086 (2004)
- Wasserscheid P, J. Ind. Eng. Chem., 13(3), 325 (2007)
- Demberelnyamba D, Yoon SJ, Lee H, Chem. Lett., 33(5), 560 (2004)
- Visser AE, Swatloski RP, Reichert WM, Griffin ST, Rogers RD, Ind. Eng. Chem. Res., 39(10), 3596 (2000)
- Chun S, Dzyuba SV, Bartsch RA, Anal. Chem., 73, 3737 (2001)
- Dietz ML, Dzielawa JA, Laszak I, Young BA, Jensen MP, Green Chem., 5, 682 (2003)
- Jensen MP, Neuefeind J, Beitz JV, Skanthakumar S, Soderholm L, J. Am. Chem. Soc., 125(50), 15466 (2003)
- Nakashima K, Kubota F, Maruyama T, Goto M, Ind. Eng. Chem. Res., 44(12), 4368 (2005)
- Nakashima K, Kubota F, Maruyama T, Goto M, Anal. Sci., 19, 1097 (2003)
- Visser AE, Swatloski RP, Reichert WM, Mayton R, Sheff S, Wierzbicki A, Davis JH Jr., Rogers RD, Chem. Commun., 1, 135 (2001)
- Pavithran R, Varma RL, Reddy MLP, Solvent Extr. Ion Exc., 21, 797 (2003)
- Lee EH, Yang HB, Kim KW, Lim JG, Yoo JH, J. Ind. Eng. Chem., 3(1), 39 (1997)
- Shimojo K, Goto M, Anal. Chem., 76, 5039 (2004)
- Nakamura T, Miyaka C, J. Alloy Compd., 192, 138 (1993)
- Wei GT, Yang Z, Chen CJ, Anal. Chim. Acta., 488, 183 (2003)
- Kosinski FE, Bostian H, J. Inorg. Nucl. Chem., 31, 3623 (1969)
- Otu EO, Chiarizia R, Solvent Extr. Ion Exc., 19(5), 885 (2001)
- Zamani AA, Yaftian MR, Sep. Purif. Technol., 40(2), 115 (2004)
- Peppard DF, Mason GW, Maier JL, Driscoll WJ, J. Inorg. Nucl. Chem., 4, 334 (1957)