Enhanced adsorption and desorption of Cr(VI) from aqueous solution using hydrous Ce1- x Zr x O2: Isotherm, kinetics and thermodynamic evaluation

Hydrous Ce1- (x) Zr (x) O-2 (x = 0.25; 0.5; 0.75) mixed oxides were used as potential Cr(VI) adsorbents, expecting to take an advantage of benefits of their corresponding single oxides (e.g. high adsorption capacity) and to eliminate their weaknesses (e.g. limited reusability, long adsorption time). Chemical incorporation of ZrO2 into CeO2 lattice significantly changed the texture and the morphology of hydrous single oxides, enhancing their adsorptive and desorptive properties. Cr(VI) removal efficiency depended on Ce/Zr molar ratio, increasing in the following order: CeO2< ZrO2

Automated summary

The chemical incorporation of ZrO2 into the lattice of CeO2 significantly changed the texture and morphology of the mixed oxides, enhancing their adsorptive and desorptive properties. The efficiency of Cr(VI) removal depended on the Ce/Zr molar ratio.