Recovery of Lithium Ions from Seawater Using a Continuous Flow Adsorption Column Packed with Granulated Chitosan–Lithium Manganese Oxide

We demonstrated an efficient recovery of lithium ions (Li+) from seawater using a continuous flow column packed with an adsorbent, chitosan–lithium manganese oxide (LMO). The effects of Li+ concentration, contact time, and recyclability were investigated. The adsorbent showed good removal efficiency...

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Published inIndustrial & engineering chemistry research Vol. 55; no. 26; pp. 7218 - 7225
Main Authors Ryu, Taegong, Haldorai, Yuvaraj, Rengaraj, Arunkumar, Shin, Junho, Hong, Hye-Jin, Lee, Go-Woon, Han, Young-Kyu, Huh, Yun Suk, Chung, Kang-Sup
Format Journal Article
LanguageEnglish
Published American Chemical Society 06.07.2016
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Summary:We demonstrated an efficient recovery of lithium ions (Li+) from seawater using a continuous flow column packed with an adsorbent, chitosan–lithium manganese oxide (LMO). The effects of Li+ concentration, contact time, and recyclability were investigated. The adsorbent showed good removal efficiency of Li+ from seawater. The maximum adsorption capacity was calculated to be 54.65 mg/g. The adsorption process fit well with the Freundlich isotherm with a correlation coefficient of 0.9924. Kinetics studies showed that the adsorption process was consistent with the pseudo-second-order model. The recyclability was tested after extraction of Li+ from the adsorbent using sulfuric acid. The adsorption capacity decreased slightly after recycling the adsorbent three times. This may be due to the dissolution of Mn2+ and deformation of the chitosan structure. A study of the selectivity of Li+ in seawater showed that the selectivity increased in the order Li+ > Mg2+ > Na+.
ISSN:0888-5885
1520-5045
DOI:10.1021/acs.iecr.6b01632