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

Taegong Ryu, Yuvaraj Haldorai, Arunkumar Rengaraj, Junho Shin, Hye Jin Hong, Go Woon Lee, Young Kyu Han, Yun Suk Huh, Kang Sup Chung

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78 Scopus citations

Abstract

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+.

Original languageEnglish
Pages (from-to)7218-7225
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume55
Issue number26
DOIs
StatePublished - 6 Jul 2016

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