The adsorption of uranium (VI) onto colloidal TiO2, SiO2 and carbon black

Abstract

The adsorption behavior of uranium (VI) onto colloidal hydrophobic carbon black and the hydrophilic, hydrous metal oxides, silica and titanium dioxide, was studied as a function of pH using quantitative adsorption isotherms and electrokinetic measurements of the suspended particles. Adsorption isotherms and micro-electrophoresis results were used in conjunction with uranium (VI) hydrolysis equilibrium data to identify the metal ion species adsorbing onto the various substrate surfaces as a function of pH. The study focuses on the solution conditions of metal ion concentration and pH, below the precipitation edge of solid uranium hydroxide. The adsorption of the uranium significantly modifies..