Adsorption of cobalt(II) ion on prepared TiO2 adsorbents in high temperature water

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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 diffractometry 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 adsorbent in 280 degrees C of high temperature water. The enthalpy change (Delta H degrees) of about 34 kJ/mol caused by the adsorption of Co2+ on the TiO2 indicates that the adsorption is endothermic in the experimental temperature range (150-280 degrees C). It was shown that specific surface area and surface OH groups of these adsorbents are not dominant factors for Co2+ adsorption on oxides at high temperature.
Publisher
HUMANA PRESS INC
Issue Date
1996-04
Language
English
Article Type
Article
Keywords

TITANIUM-OXIDE; REMOVAL

Citation

HIGH TEMPERATURE AND MATERIALS SCIENCE, v.35, no.2, pp.187 - 202

ISSN
1080-1278
URI
http://hdl.handle.net/10203/77253
Appears in Collection
CBE-Journal Papers(저널논문)
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