| 초록 |
Hydroxyapatite (HAp) has recently gained considerable interest from industry and academia because of its high removal capacity for divalent heavy metal ions from wastewater via ion exchange reaction. 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. So it is needed for HAp to be immobilized into a matrix. Therefore, in this study we have prepared polylactide(PLA)/HAp composite foams by using PLA as the binding material for HAp powders and supercritical carbon dioxide as the eco-friendly foaming agent. We have characterized the PLA/Hap composite foams and investigated their Pb(II) ion removal features from aqueous solution with various initial Pb(II) ion concentrations and pH values. The removal kinetics and thermodynamics of the composite foams were analyzed based on the pseudo-second kinetic model and Langmuir adsorption isotherm model, respectively |
