Binding of Pb and Zn to Aluminium Oxide and Proton Stoichiometry

Authors

Wing H. Leung, Hampton University
A. Kimaro, Hampton University

Document Type

Article

DOI

10.25778/p6hh-vx69

Abstract

The interaction of Pb and Zn with Al₂O₃ in aqueous solution was studied as a function of pH and metal ion concentration. Results indicated the complexation of metal ions by oxide surfaces is strongly pH dependent; the extent of adsorption is a function of pH with an abrupt change within approximately 2 pH units. The adsorption of Pb and Zn on aluminium oxide can be interpreted in terms of a surface complexation formed by association with one surface AlOH group, thus releasing one bound hydrogen ion. -AlOH + M²⁺ = -AlOM⁺ + H⁺ . It is suggested that the major surface reaction is the formation of a monodentate inner-sphere complex.

Recommended Citation

Leung, Wing H. and Kimaro, A. (2000) "Binding of Pb and Zn to Aluminium Oxide and Proton Stoichiometry," Virginia Journal of Science: Vol. 51: No. 1, Article 4.
DOI: 10.25778/p6hh-vx69
Available at: https://digitalcommons.odu.edu/vjs/vol51/iss1/4