cathodic synthesis of al-ce-mn oxide nanohybride powder with improved surface for effective removal of fluoride from aqueous media

Al-ce-mn oxide samples were synthesized by the cathodic electrochemical method at current densities of 5, 15, and 35 macm^-2. the xrd, sem, and edx techniques were used for the characterization of samples. the sem images show that at high current density the one-dimensional(nanowire) structure and at low current density two-dimensional (nanosheet) structure were obtained. moreover, the particle sizes are decreased with increasing the current density. the samples were applied for the uptake of fluorine (f-) ions from solutions. the influence of the contact time, initial fluoride concentration, and solution ph on the adsorption was investigated. the results showed more than 80 % of f- ions were uptake from solution during the three hours initial contact times and the uptake capacity has little change at ph below 6 and it has a sharp decline with increasing solution ph. the kinetic data were well fitted to the pseudo-secondorder model and the equilibrium adsorption data was well described by the langmuir isotherm model. the adsorption capacity was 48 mg/g at ph 6 and room temperature.