| 초록 |
Chelating resins are useful substances in industry because of their extraordinary adsorption properties for specific metal ions. Therefore, they have been widely used for removing heavy metal ions in waste water and for concentrating and retrieving noble metal ions. There are a number of reports of different types of chelating resins. Thiourea is a potentially interesting ligand because it has been found to adsorb some noble metal ions effectively. The chelating resins containing thiourea have been manufactured by reactions between thiourea and some polymers, such as crosslinked polychloromethylstyrene, polyvinylchloride, etc. In this study, crosslinked polychloromethylstyrene nanoparticles were prepared from chloromethylstyrene via emulsion polymerization, and then treated with thiourea, to yield thiourea-immobilized polymer nanoparticles. The removal efficiency of the polymer beads was affected by various variables such as pH, contact time, concentration, temperature, etc. The experimental results will be presented in detail. |
