The adsorption of basic .ALPHA.-amino acids in an aqueous solution by titanium(IV) oxide.
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概要
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TiO<SUB>2</SUB> showed a pronounced activity in the adsorption of basic α-amino acids, such as L-lysine and L-arginine, in an aqueous solution. The adsorptive activity of TiO<SUB>2</SUB> containing sulfate ions was lower than that of the sulfate ion-free TiO<SUB>2</SUB>, and it was suppressed by phosphate ions. The pH of the aqueous solution hardly affected the adsorption, while the heat-treatment of TiO<SUB>2</SUB> above 500 °C noticeably lowered the adsorption. The Langmuir equation was applicable to the adsorption of L-lysine, showing that the amount of saturated adsorption was about 0.7 mmol/g TiO<SUB>2</SUB> heat-treated at 500 °C. The heat of adsorption of L-lysine, as determined from the adsorption isotherms at 10, 30, and 50 °C, was 2257 J/mol. A linear relationship was observed between the amount of L-lysine adsorbed and that of the surface OH groups.
- 公益社団法人 日本化学会の論文
著者
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Okazaki Susumu
Depariment Of Physics Faculty Of Science Okayama University
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Aoki Teruaki
Department of Industrial Chemistry, Faculty of Engineering, Ibaraki University
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Tani Koichi
Department of Industrial Chemistry, Faculty of Engineering, Ibaraki University
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