| 초록 |
Disposal of radioactive iodines caused by unexpected nuclear accidents and excessive use in the medical treatment can be a major issue, and thus many efforts has been devoted to protecting the environment from radioactive iodines. In this study, we fabricate gold nanoparticles-immobilized in the cellulose acetate (Au-CA) and polyvinylidene fluoride (Au-PVDF) membranes for selective desalination of iodide ions in water. The characterization of adsorptive membranes was performed using FE-SEM, EDX, and TEM. Through the continuous-flow experiments, iodide ions dissolved in various aqueous solutions were passed through the membrane quickly (10 seconds). Au-CA and Au-PVDF showed maximum monolayer adsorption capacities of 17.86 and 16.42 mg/g for iodide respectively. The removal mechanism is explained by the high affinity of AuNPs towards iodide ions. It is expected that the present method would be applied to the purification of medical and industrial radioactive wastes in water. |
