| 초록 |
Novel core-shell magnetic mesoporous silica hybrid nanoparticles were synthesized and functionalized further with a glycidol reagent to produce boron-specific cis-diol, chelating functional derivatives. The magnetic mesoporous silica hybrid nanoparticles had a surface area, diameter, pore size, and saturation magnetization of 629 m2 g-1, 200-300 nm, 2.5 nm, and 33.25 emu g-1, respectively. The glycidol-modified nanoparticles with cis-diol functional groups showed high adsorption affinity and excellent selectivity towards boron in an aqueous solution, even in the presence of competitive metal ions. Adsorption equilibrium could be established within 15-20 min, and the level of boron adsorption was 2.37 mmol g-1. The magnetic mesoporous silica adsorbent showed ~ 97% boron removal capacity from a H3BO3 solution (100 mg L-1), and the used adsorbent particles could be retrieved by an external magnetic field. The adsorbent could be used repeatedly after a simple acid treatment (0.1 M HCl). |
