Mechanochemical synthesis of silica-lithium manganese oxide composite for the efficient recovery of lithium ions from seawater
| Autor: | Byoung-Gyu Kim, Seung-Kyu Hwang, Go-Woon Lee, Arunkumar Rengaraj, Kang-Sup Chung, Sang Rak Choe, Junho Shin, Yuvaraj Haldorai, Taegong Ryu, Yun Suk Huh, Young-Kyu Han |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Thermogravimetric analysis
Materials science Inorganic chemistry chemistry.chemical_element 02 engineering and technology Manganese engineering.material 010402 general chemistry 01 natural sciences law.invention symbols.namesake Adsorption law General Materials Science Calcination Dissolution Spinel Langmuir adsorption model General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Amorphous solid chemistry engineering symbols 0210 nano-technology |
| Zdroj: | Solid State Ionics. 308:77-83 |
| ISSN: | 0167-2738 |
| DOI: | 10.1016/j.ssi.2017.05.020 |
| Popis: | In this study, to prevent manganese dissolution from an acid treatment during the extraction of lithium ions (Li + ), silica (SiO 2 ) was mixed mechanically with lithium manganese oxide (Li 1.33 Mn 1.67 O 4 , LMO) by a high-energy milling technique followed by calcination. The milling process ensured high-level chemical homogeneity of metal oxides. The amorphous SiO 2 imparted stability to the LMO spinel structure and reduced the level of Mn dissolution during the extraction of Li + using an acid. X-ray diffraction and thermogravimetric analysis confirmed that the amorphous SiO 2 was well mixed in the framework of LMO. The Li-Si-Mn-O composite was used as an efficient adsorbent for the recovery of Li + from lithium spiked seawater with an adsorption capacity of 43.23 mg g − 1 . The adsorption process fitted the Langmuir isotherm well with a correlation coefficient of 0.9831. The kinetic study showed that the adsorption behavior followed pseudo-second-order kinetics. The adsorbent exhibited excellent selectivity towards Li + , even in the presence of competitive cations with a higher concentration than Li + . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect