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 language | English |
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Pages (from-to) | 7218-7225 |
Number of pages | 8 |
Journal | Industrial and Engineering Chemistry Research |
Volume | 55 |
Issue number | 26 |
DOIs | |
State | Published - 6 Jul 2016 |