Adsorption of Phosphorus Oxoacid on Hydrous Titanium(IV) Oxide in an Aqueous Solution
- 1 August 1986
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 59 (8) , 2611-2614
- https://doi.org/10.1246/bcsj.59.2611
Abstract
The adsorption behavior of phosphorus oxoacid, such as phosphinate, phosphonate, and phosphate, on hydrous titanium(IV) oxide in an aqueous solution was studied in detail. Hydrous titanium(IV) oxide has a pronounced activity for the adsorption of phosphonate and phosphate ions. However, phosphinate ion is little adsorbed on hydrous titanium(IV) oxide. The pH of aqueous solution remarkably affects the adsorption. Amounts of adsorbed phosphonate or phosphate ion from solutions of 500 mg l−1 concentration are about 0.5 mmol g−1 near pH 2. The Langmuir equation, applicable to the adsorption of phosphonate ion, has evaluated the maximum adsorption as being about 0.9 and 0.3 mmol g−1 at pHs 2 and 7, respectively. The heat of adsorption of phosphonate is −5.9 kJ mol −1 at pH 2. The adsorptive activity of hydrous titanium(IV) oxide for phosphonate is suppressed by coexisting ions, such as phosphate and anionic nickel(II) complexes.This publication has 1 reference indexed in Scilit:
- Ion-exchange and surface properties of titania gels from Ti(IV) sulfate solutionsJournal of Colloid and Interface Science, 1973