| 초록 |
Hydroxyapatite(HAp) has recently attracted considerable interest because of its high removal capacity for divalent heavy metal ions from aqueous solution via ion exchange reaction. Immobilization of heavy metal ions on synthetic or natural HAp is becoming a promising way for remediation of wastewater and soil. However, HAp is usually provided in powder or calcined pellets, which might be a disadvantage to recover this material after removing heavy metal ion from wastewater. Therefore, in this study, polylactide(PLA) was adopted as a binding material for HAp powders and supercritical carbon dioxide was used as a foaming agent for PLA/HAp composite foams. The microstructure and morphology of the composite foams were controlled by temperature and pressure, and characterized by using SEM. The heavy metal absorption performance of PLA/HAp composite foams was investigated by monitoring the change of Pb2+ ion concentration in aqueous solutions with the aid of atomic absorption spectroscopy. |
