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https://dspace.ffh.bg.ac.rs/handle/123456789/1616| Title: | The influence of the solid/liquid ratio on the point of zero charge of alumina | Authors: | Todorović, Ž N. Milonjić, S. K. Dondur, Vera |
Keywords: | Alumina;Point of Zero Charge;Surface Properties | Issue Date: | 1-Jan-2004 | Journal: | Materials Science Forum | Abstract: | The point of zero charge (pHpzc) of three samples of commercial aluminum oxide in aqueous KNO3 (10-3 - 10-1 mol/dm3) solution was investigated using batch equilibration, mass titration and acid-base titration methods. Structural and chemical characteristics of the alumina samples were determined by X-ray diffraction (XRD) and energy-dispersive X-ray fluorescence spectroscopy (EDXRFS). The obtained pHpzc values (5 to 8.5) dependent on the alumina/solution ratio increase with increasing ratio to a constant value. The concentration of dissolved aluminum ions as a function of solution pH (pH = 3.5 - 11) exhibit a parabolic trend, with the minimum solubility at pHpzc. |
URI: | https://dspace.ffh.bg.ac.rs/handle/123456789/1616 | ISSN: | 0255-5476 | DOI: | 10.4028/www.scientific.net/msf.453-454.361 |
| Appears in Collections: | Journal Article |
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