| 초록 |
An organic-inorganic composite composed of Prussian blue (PB)/Chitosan (CS)/Graphene oxide (GO) has been synthesized and and utilized as a potential adsorbent for the removal of cesium ions (Cs+) from aqueous solution. The effects of adsorbate concentration, reaction pH, and time on the removal efficiency of Cs+ were investigated. The optimal pH and reaction time for the removal of Cs+ were identified as pH 7 and 24 h, respectively, with an adsorbent dosage of 20 mg. The adsorption isotherm is better fitted to the Freundlich model than the Langmuir model with a maximum Cs+ adsorption capacity of 33 mg g-1. In addition, the kinetic study showed that the adsorption behavior followed a pseudo-second-order kinetics. The adsorbent showed good selectivity towards Cs+ even in the presence of competitive cations having a higher concentration than Cs+. From the above results, it is expected that this organic-inorganic composite can be used as a potential adsorbent for the removal of radioactive cesium. |
