Desorption of Lithium from Manganese Oxide Adsorbent with Ammonium Peroxodisulfate as an Eluent

Recovery of Lithium form Sea Water by Manganese Oxide Adsorbent (Part 11)

Abstract

The desorption properties of lithium ions from the ion-sieve manganes oxide [HMnO(2Mg)] were investigated using (NH₄)₂S₂O₈ as an eluent. The effects of temperature,(NH₄) ₂S₂O₈ concen tration, and solid-solution ratio on the Li⁺ ion desorptivity were examined. More than 97% of the adsorbed Li⁺ ions could be desorbed by the treatment of the adsorbent with a 0.5-M (NH₄)₂S₂O₈ solution at 30°C for 1 h. The adsorbent after the desorption showedthe lithium adsorptivity to be nearly equal to that on the original one.