Preparation of porous magnesium oxide foam and study on its enrichment of uranium

Herein, we prepared porous magnesium oxide (MP-MgO) by in situ carbonization and using Mg(NO3)(2) as precursor along with P123 as soft template. The BET surface area, and total pore volume of MP-MgO were found to be 14.76 m(2) g, 0.15 cm(3) g(-1), respectively. The adsorption behavior of U (VI) by the porous MgO was studied by static adsorption experiments, and also the effects of adsorption time, pH of wastewater and U (VI) concentration were discussed. The results indicated that the optimum pH for MP-MgO was 3.0-4.5, the removal of uranium in this case was mainly due to surface complexation. Through the study, we found that the adsorption capacity of MP-MgO for uranium was more than 2500 mg g(-1), the adsorption equilibrium time was about 150 min. Moreover, the kinetic study showed that the process followed the pseudo-first-order model, and the adsorption process was spontaneous and endothermic. (C) 2018 Published by Elsevier B.V.