Titanium hydroxide as a new inorganic fluoride ion exchanger

Although TiO2 exhibits a small fluoride ion exchange capacity, it was found that titanium hydroxide, Ti(OH)4, can exchange fluoride ion with large saturation capacity of 1.60 m.mol/g. Although the H2PO4(-) interferes with the F- exchange, the amount of F- exchange of Ti(OH)4 was hardly changed by th...

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Veröffentlicht in:	Nihon Seramikkusu Kyōkai gakujutsu ronbunshi 2002, Vol.110 (9), p.801-803
Hauptverfasser:	ISHIHARA, Tatsumi, SHUTO, Yasuhiro, UESHIMA, Soichiro, NGEE, Ho Li, NISHIGUCHI, Hiroyasu, TAKITA, Yusaku
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Exact sciences and technology General and physical chemistry Ion-exchange Other ion exchangers: preparations and properties Surface physical chemistry
Online-Zugang:	Volltext
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Zusammenfassung:	Although TiO2 exhibits a small fluoride ion exchange capacity, it was found that titanium hydroxide, Ti(OH)4, can exchange fluoride ion with large saturation capacity of 1.60 m.mol/g. Although the H2PO4(-) interferes with the F- exchange, the amount of F- exchange of Ti(OH)4 was hardly changed by the coexistence of Cl-, NO3(-), and SO4(2-). The capacity for F-exchange was almost unchanged over 4 times repetition of ion-exchange and desorption and furthermore, the elution of Ti was negligibly small. Consequently, Ti(OH)4 is expected to be a new inorganic F- exchanger for the removal of fluoride ion from wastewater. 7 refs.
ISSN:	0914-5400