Dissolution mechanism of aluminum hydroxides in acid media

Autor: I. G. Gorichev, A. S. Tuzhilin, E. G. Gololobova, Yu. A. Lainer
Rok vydání: 2008
Předmět:
Zdroj: Russian Metallurgy (Metally). 2008:294-300
ISSN: 1555-6255
0036-0295
DOI: 10.1134/s0036029508040046
Popis: The effects of the concentration, temperature, and potential at the hydroxide/electrolyte interface on the aluminum hydroxide dissolution in sulfuric, hydrochloric, and perchloric acids are studied. The limiting stage of the aluminum hydroxide dissolution in the acids is found to be the transition of the complexes that form on the aluminum hydroxide surface from the solid phase into the solution. The results of the calculation of the acid-base equilibrium constants at the oxide (hydroxide)/solution interface using the experimental data on the potentiometric titration of Al2O3 and AlOOH suspensions are analyzed. A mechanism is proposed for the dissolution of aluminum hydroxides in acid media.
Databáze: OpenAIRE