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Ion Exchange Characteristics of Palladium from Nitric Acid Solution by Anion Exchangers
Korea Atomic Energy Research Institute, Yusong, Taejon, Korea
shlee6@nanum.kaeri.re.kr
Korean Journal of Chemical Engineering, September 1999, 16(5), 571-575(5), 10.1007/BF02708133
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Abstract
Radioactive high-level liquid wastes contain significant quantities of platinum group metals (PGM) such as Pd(Ⅱ), Rh(Ⅲ) and Ru(Ⅲ). The PGM are produced as fission products in nuclear reactors. In this study, batch and column experiments were carried out to investigate the ion exchange characteristics of Pd(Ⅱ), including the effects of the ionic group of ion exchangers, solution temperature, and the concentration of nitric acid by various anion exchangers such as IRN 78 and Dowex 1×8 and also the elution characteristics of Pd(Ⅱ) by various eluents for the determination of optimal separation conditions. Anion exchangers such as Dowex 1×8 with the ionic group of quaternary methyl ammonium showed a higher capacity than anion exchangers such as IRN 78 with amine group for the adsorption of Pd(Ⅱ) from nitric acid solution. The optimal nitric acid concentration was shown to be in 2-3 M. The adsorbed Pd(Ⅱ) was effectively eluted out by 0.5 M thiourea and 0.1 M nitric acid mixed solution.
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References
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Faris JR, Buchum RF, "Anion Exchange Characteristics of the Elements in Nitric Acid and Nitrate Solutions and Applicationin Trace Element Analysis," ANL-6811 (1964)
Gaita R, AL-Bazi SJ, Talanta, 42(2), 249 (1995)
Helfferich F, "Ion Exchang," McGraw-Hill, New York (1962)
Jensen GA, Platt AM, Mellinger GB, Bjorklund WJ, Nucl. Technol., 65, 305 (1984)
Kondo Y, Kuboto M, J. Nucl. Sci. Technol., 29(2), 140 (1992)
Lee SH, Kim KR, Shon JS, Yoo JH, Chung H, Korean J. Chem. Eng., 16(2), 166 (1999)
Marina IJ, Jarvis I, Totland MM, Jarvis KE, Analyst, 122, 19 (1997)
Naito K, Natsui T, Tanaka Y, J. Nucl. Sci. Technol., 23(6), 540 (1986)
Navratil JD, J. Nucl. Sci. Technol., 26(8), 735 (1989)
Rizvi GH, Mathur JN, Murali MS, Iyer RH, Sep. Sci. Technol., 31(13), 1805 (1996)
Smith FJ, Mcduffie HF, Sep. Sci. Technol., 16(9), 1071 (1981)
Wei YZ, Kumagi M, Takashima Y, "Adsorption and Elution Behavior of Platinum Group Metals in Nitric Acid Medium," Proceeding of IEX '96, 174, Royal Society of Chemistry (1996)
