Protonated Titanate Nanotubes and their adsorption behaviors for U(VI) in Aqueous Solutions

Abstract

Titanate nanotubes was rapidly synthetized by nano anatase with mild hydrothermal method, and its protonation was carried by Nitric acid to prepare TNTs and TNTs-H with different H+/Na+ for further application of uranium removal in the wastewater. It was characterized by XRD, TEM and FT-IR. The results showed that at 298 K and pH 7, the adsorption rates of TNTs and TNTs-H to 10 mg/L U(VI) were 77.90% and 97.78% respectively, and the maximum adsorption capacity of U(VI) were 41.494 mg/g and 49.505 mg/g respectively. The adsorption processes all followed a pseudo second-order kinetic model and were in accordance with isotherm adsorption models like Langmuir model.