Preparation and Adsorption Performance for La3+ of Polyionic Liquid Solid Phase Adsorbent.

Three kinds of polyionic liquid solid phase adsorbent (P[BVIM]Br-MNPs), P[HVIM]Br-MNPs and P[OVIM]Br-MNPs) were prepared. The effects of P204 doping ratio, solid phase adsorbent amount, adsorption time and temperature, aqueous phase pH and initial mass concentration of La³⁺ in aqueous phase on adsorption of La³⁺ by polyionic liquid solid phase adsorbent were examined. Langmuir and Freundlich isotherm equations were used to fit test data. The results show that the saturated adsorption capacity of the solid phase adsorbent for La³⁺ is 57.80 mg/g at 70 °C and 1 g P[OVIM]Br-MnPs doped with 1 mL P204, and the adsorption process is mainly monollayer adsorption. [ABSTRACT FROM AUTHOR]