Abstract
Polyaniline (PANI) was synthesized in HCl (1 M) and in the presence of two ionic liquids: 1-butyl-3-methylimidazolium tetrafluoroborate (BMimBF4) and 1-hexyl-2,3-dimethylimidazolium chloride ([HMMim][Cl]). The resulting polymers (PANI and PANI doped by ionic liquids) were associated to polyvinyl alcohol to prepare cation-exchange membranes. The membranes were characterized by optical microscopy, scanning electron microscopy, differential scanning calorimetry, and thermogravimetry analysis. After characterization, the membranes were applied to the elimination of heavy metals (copper, lead, and cadmium) in aqueous solutions via electrodialysis. The results showed extraction percentages comprised between 80.63 and 96.04 % (for Cu2+), 87.89 and 99.55 % (for Pb2+), and 68.53 and 88.03 % (for Cd2+).
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Acknowledgements
This work was supported by the [International Science Program (ISP), University of Uppsala (Sweden) under Grant to African Network of Electroanalytical Chemists [IPICS/ANEC] and by TWAS, The World Academy of Science for the Advancement of Science in developing countries under No. 16-499RG/CHE/AF/AC_G–FR3240293299. C.A. Ferreira is grateful to CNPq, CAPES and FAPERGS by the support to the work.
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Dièye, E.H., Fall, A., Fall, M. et al. Removal of heavy metals by electrodialysis using polyanilines prepared in hydrochloric acid and ionic liquids. emergent mater. 5, 1533–1542 (2022). https://doi.org/10.1007/s42247-021-00299-y
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DOI: https://doi.org/10.1007/s42247-021-00299-y