Removal of Cs+, Sr2+ and Co2+ by activated charcoal modified with Prussian blue nanoparticle (PBNP) from aqueous media: kinetics and equilibrium studies

摘要

Releasing radionuclide elements from nuclear activities became an important issue. Preparation of activated charcoal-Prussian blue nanoparticles AC-PBNP for uptake some of these elements Cs+, Sr2+ and Co2+ is carried out by impregnation of AC with a solution of Prussian blue. The removal process indicated that the AC-PBNP is an efficient adsorbent for these elements in the order of Cs+ > Sr2+ > Co2+ at pH 6.8 following the Langmuir isotherm and pseudo second order kinetic models. Also, adsorption process was found endothermic and spontaneous with maximum saturation capacities of 67.9, 29.6 and 15.3 mg/g for Cs+, Sr2+ and Co2+, respectively.