MnCO3 and Li2CO3 as raw materials were mixed and calcined to prepare Li4Mn5O12 powders, which was further added into the polyvinyl chloride (PVC) and N,N-Dimethylformamide (DMF) solutions to form suspensions. The suspensions were dried and acid-washed to obtain spherical PVC?MnO2 with 3?4 mm size. PVC?MnO2 was used to adsorption Li ion. The results showed that the adsorption of Li ion onto PVC?MnO2 followed the Langmuir isotherm model and the pseudo-second order kinetic equation. The enthalpy change (0.358 kJ/mol) was positive indicating the adsorption of Li ion onto PVC?MnO2 was an endothermic reaction, and the maximum adsorption capacity of Li ion was 23.4 mg/g.
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