Adsorption of Cobalt(II) Ion on Anhydrous Titanium Dioxide at Elevated Temperature

Kwang-Rag Kim; Uh-Chul Kim

Journal of Industrial and Engineering Chemistry, Vol.4, No.4, 270-276, December, 1998

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Adsorption of Cobalt(II) Ion on Anhydrous Titanium Dioxide at Elevated Temperature

Kwang-Rag Kim^†, and Uh-Chul Kim

Korea Atomic Research Institute, Taejon 305-353, Korea

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TiO₂ adsorbents were prepared by hydrolysis of Ti(OC₃H₇)₄ followed by heat treatment of their hydroxides. Their structures were studied by X-ray diffractometer and Fourier-transform infrared spectrometer as a function of preparation pH. The Co²⁺ adsorption characteristics of the adsorbent in high temperature water were investigated in a stirred autoclave. Co²⁺ adsorption capacity of the TiO₂ adsorbent was determined to be 0.09 meq·g^-1 adsorbent in 280℃ of high temperature water. enthalpy change (ΔH^o) of about 34 kJ·mol^-1 due to the adsorption of Co²⁺ on the TiO₂ indicates that the adsorption is endothermic in the experimental temperature range (150-280℃). It was shown that specific surface area and surface OH groups of these adsorbents are not a dominant factor for Co²⁺ adsorption on oxides at a high temperature.

Keywords:TiO₂;Adsorbent;PWR;BWR;Coolant;Purification

[References]

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Michael N, Fletcher WD, Bell MJ, Croucher DE, Inorganic Ion-Exchange Materials for Water Purification in CVTR, Westinghouse Electric Corporation Report CVNA-135, Pittsburgh, PA (1961)
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[1] Amphlett CB, Inorganic Ion Exchangers, p. 130, Elsevier Publishing, Co., Amsterdam (1964)

[2] Michael N, Fletcher WD, Bell MJ, Croucher DE, Inorganic Ion-Exchange Materials for Water Purification in CVTR, Westinghouse Electric Corporation Report CVNA-135, Pittsburgh, PA (1961)

[3] Tewari PH, Lee W, J. Colloid Interface Sci., 52, 77 (1975)

[4] Tewari PH, Tuxworth RH, Lee W, J. Electrochem. Soc., 91 (1973)

[5] Tewari PH, McIntyre NS, AIChE Symp. Ser., 71, 134 (1975)

[6] Ahrland S, Carleson G, J. Inorg. Nucl. Chem., 33, 2229 (1971)

[7] Balakrishnan PV, Buckley LP, Corrosion-Product Filtration in PWRs, EPRI NP-5727, Chalk River, Ontario, Canada (1988)

[8] Kikuchi M, Ga E, Funabashi H, Yusa H, Radiochem. Radioanal. Lett., 33, 331 (1978)

[9] Kikuchi M, Ga E, Funabashi K, Yusa H, Uchida S, Fujita K, Nucl. Eng. Design, 53, 387 (1979)

[10] Kawamura F, Funabashi K, Kikuchi M, Ohsumi K, Nucl. Technol., 65, 332 (1984)

[11] Fujita K, Yamashita H, Takeuchi S, Nakajima F, J. Inorg. Nucl. Chem., 43, 188 (1980)

[12] Fujita K, Takeuchi S, Yamashita H, J. Chem. Soc. Jpn., 9, 1656 (1985)

[13] Hata K, Kitao H, Miyazaki T, Ohsawa Y, Development of High Temperature Adsorbent, Water Chemistry of Nuclear Reactor Systems 4. BNES, p. 191, London (1986)

[14] MacDonald DD, Shierman GR, Butler P, The Thermodynamics of Metal-Water Systems at Elevated Temperatures Part 3: The Cobalt-Water System, Atomic Energy of Canada Ltd. AECL-4138 (1972)

[15] Hoshi M, Tachikawa E, Yonezawa C, Goto S, Yamamoto K, J. Nucl. Sci. Technol., 23, 722 (1986)

[16] Cotton FA, Wilkinson G, Advanced Inorganic Chemistry, p. 726, Wiley-Interscience, New York (1988)

[17] Hench LL, Ulrich DR, Ultrastructure Processing of Ceramics, Glasses, and Composites, John Wiley and Sons, New York (1984)

[18] Silverstein RM, Bassler GC, Morrill TC, Spectrometric Identification of Organic Compounds, 3rd Edn., John Wiley and Sons, New York (1974)