Recovery of lithium from seawater using a new type of ion-sieve adsorbent based on MgMn/sub 2/O/sub 4/

Journal Article · · Sep. Sci. Technol.; (United States)

OSTI ID:7200593

Miyai, Y; Ooi, K; Katoh, S

A new type of ion-sieve manganese oxide, HMnO(Mg), was prepared by an acid treatment of MgMn/sub 2/O/sub 4/. The HMnO(Mg) showed a remarkably high selectivity for lithium ions among alkali metal and alkaline earth metal ions. The selectivity sequences were Na = K << Li for alkali metal ions and Mg < Ca < Sr < Ba for alkaline earth metal ions at pH 8. The HMnO(Mg) showed a high selectivity for lithium ions in seawater. The lithium uptake increased with increasing solution pH and adsorption temperature. The maximum lithium uptake from native seawater reached 8.5 mg/g, corresponding to a lithium content of 1.8% in the form of Li/sub 2/O. The adsorbed lithium could easily be eluted with a dilute acid solution. The adsorptive capacity for lithium ions gradually decreased through repeated adsorption/elution cycles. The HMnO(Mg) after 4 cycles showed a lithium adsorptivity which was about 60% of the initial value.

• Research Organization: Government Industrial Research Institute, Kagawa (Japan)
• OSTI ID: 7200593
• Journal Information: Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 23:1-3; ISSN SSTED
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ADSORBENTS
ADSORPTION
ALKALI METALS
CHALCOGENIDES
CHEMICAL PREPARATION
DATA
ELEMENTS
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
LITHIUM
MANGANESE COMPOUNDS
MANGANESE OXIDES
METALS
MOLECULAR SIEVES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PH VALUE
SEAWATER
SEPARATION PROCESSES
SORPTION
SYNTHESIS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
WATER