Ion-imprinted nanofibers of PVDF/1-butyl-3-methylimidazolium tetrafluoroborate for dynamic recovery of europium (III) ions from mimicked effluent

Add time:08/05/2019    Source:sciencedirect.com

Discharge of liquid effluents from industries in an open environment causes severe pollution to natural water sources and carcinogenicity to aquatic animals. Present study reports the utilization of ion-imprinted polyvinylidene/1-butyl-3-methylimidazolium tetrafluoroborate (PVDF/RTIL) nanofibers fabricated via facile electrospinning technique, for effective recovery of europium III [Eu3+] ions for supplementing its supply for technological applications. RTIL used in this study provided active sites for recovery of Eu3+ ions through its functional groups. Maximum recovery of Eu3+ ions on PVDF/RTIL nanofibers was found to be 22.37 mg/g, with 90% of recovery achieved within 3 h (at pH ∼ 7.0, and T = 298 K). FE-SEM, FTIR and BET characterizations confirmed the recovery of Eu3+ ions on PVDF/RTIL nanofibers. Experimental parameters like adsorption isotherm, influence of pH of solution, and initial metal ion concentration were also investigated. Results demonstrated that recovery of Eu3+ ions onto ion-imprinted PVDF/RTIL nanofibers corresponds to Freundlich isotherm model (R2 = 0.98297). For investigation of economic viability sequential adsorption–desorption experiments were carried out which confirmed that PVDF/RTIL nanofibers can be readily regenerated and reused for five successive cycles without significant drop in effectiveness. Results demonstrate that PVDF/RTIL nanofibers can be effectively used for recovery of Eu3+ ions from mimicked liquid effluents.

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