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ADSORPTION OF COBALT(II) ION BY TITANIUM-BASED OXIDES IN HIGH TEMPERATURE WATER
Korean Journal of Chemical Engineering, January 1999, 16(1), 34-39(6), 10.1007/BF02699002
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Abstract
Titanium-based adsorbents such as TiO2 and Fe-Ti-O were prepared by hydrolysis of Ti(OC3H7)4 and alkalinizing an equimolar mixed solution of TiC14 and FeCl2 followed by heat treatment of their hydroxides, respectively. The prepared Fe-Ti-O adsorbent was found to be stable nonstoichiometric ferrous and ferric titanium oxides with pseudobrookite and rutile structures. The Co2+ adsorption characteristics of the adsorbent in high temperature water were investigated in the autoclave. Co2+ adsorption capacity of the Fe-Ti-O adsorbent was determined to be larger than that of TiO2 at high temperatures. The enthalpy changes of 34 and 49 kJ·mol-1 due to the adsorption of Co2+ on the TiO2 and Fe-Ti-O adsorbents indicate that the adsorption is endothermic in the experimental temperature range (15-280℃). From this preliminary study, titanium-based oxides are shown to have good potential applicability far reactor water purification as high temperature adsorption media.
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Cotton FA, Wilkinson G, "Advanced Inorganic Chemistry," Wiley-Interscience, New York (1988)
Fujita K, Takeuchi S, Yamashita H, J. Chem. Soc. Jpn., 9, 1656 (1985)
Fujita K, Yamashita H, Takeuchi S, Nakajima F, J. Inorg. Nucl. Chem., 43, 188 (1980)
Hata K, Kitao H, Miyazaki T, Ohsawa Y, "Development of High Temperature Adsorbent," Water Chemistry of Nuclear Reactor Systems 4. BNES, London (1986)
Hench LL, Ulrich DR, "Ultrastructure Processing of Ceramics, Glasses, and Composites," John Wiley and Sons, New York (1984)
Kawamura F, Funabashi K, Kikuchi M, Ohsumi K, Nucl. Tech., 65, 332 (1984)
Kikuchi M, Ga E, Funabashi H, Yusa H, Radiochem. Radioanal. Lett., 33(5-6), 331 (1978)
Kikuchi M, Ga E, Funabashi K, Yusa H, Uchida S, Fujita K, Nucl. Eng. Des., 53, 387 (1979)
MacDonald DD, Shieman GR, Butler P, Atomic Energy of Canada Ltd. AECL-4138 (1972)
Michael N, Fletcher WD, Bell MJ, Croucher DE, "Inorganic Ion-Exchange Materials for Waste Purification in CVTR," Westinghouse Electric Corporation Report CVNA-135 (1961)
Tewari PH, Lee W, J. Colloid Interface Sci., 52(1), 77 (1975)
Tewari PH, Mclntyre NS, AIChE Symp. Ser., 71(150), 134 (1975)
Tewari PH, Tuxworth RH, Lee W, "Specific Adsorption of Co(II) by ZrO2 and Fe3O4," Proc. of Symp. on Oxide-Electrolyte Interface. -J. Electrochem. Soc. (1973)
