In　this　account,　manganese　oxide　lithium　ion-sieve　MO　derived　from　spinel　lithium-enriched　manganese　oxide　Li1.45Mn1.67O4　(　LMO)　was　prepared　and　its　structure,　morphology　and　valence　of　Mn　for　both　LMO　and　MO　were　analyzed　by　XRD,　SEM　and　XPS,　respectively.　The　results　revealed　that　after　acid　leaching,　MO　maintained　the　spinel　structure　and　porous　morphology　of　LMO,　which　was　beneficial　to　the　Li+　adsorption　process.　The　estimated　average　valence　of　Mn　in　MO　was　3.91.　The　adsorption　of　lithium　for　MO　in　a　LiCl-NH3　center　dot　H2O-NH4Cl　buffer　solution　at　pH　=　9　showed　the　best　fit　with　a　Langmuir　isotherm,　indicating　that　a　Li+-H+　ion　exchange　mechanism　took　place.　The　adsorption　kinetics　study　demonstrated　that　the　Li+　adsorption　process　of　MO　complied　with　a　pseudo-second　order　model,　where　the　control　step　of　the　adsorption　process　changed　with　temperatures.　The　ion　exchange　isotherms　showed　that　the　ion-sieve　MO　could　complete　an　exchange　reaction　in　LiCl-NH3　center　dot　H2O-NH4Cl　buffer　solution.　Finally,　the　MO　was　applied　to　recover　lithium　from　a　simulated　ammoniacal　spent　lithium　ion　battery　processing　solution　with　a　capacity　of　15　mg/g.　(C)　2017　Elsevier　Ltd.　All　rights　reserved.