| 초록 |
Adsorbent (H2MnO3) prepared from dilithium dioxido(oxo) manganese by acid treatment with 2.5 N H2SO4 at 75°C for 24 hr was investigated for lithium recovery. The precursor was synthesized by solid-state reaction between Li2CO3 and MnCO3 at 450°C. The materials were characterized by elemental analysis, powder X-ray diffraction, Field Emission Scanning Electron Microscopy and BET surface area. The adsorption capacity (QLi+) of H2MnO3 was significantly increased as the initial pH and Li+ concentration of solution were increased. The equilibrium distribution coefficients of metal ions between the seawater and H2MnO3 followed the order: K+ ＜ Na+ ＜ Ca2+ ＜ Mg2+ ＜ Sr2+ ＜ Li+. The fabricated H2MnO3 was found to be a potential adsorbent for Li+ extraction from seawater. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT & Future Planning (No. 2012R1A2A1A01009683) and the Ministry of Education (No. 2009-0093816). |
