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Smart pillar[5]arene-based PDMAEMA/PES beads for selective dye pollutants removal: design, synthesis, chemical-physical characterization, and adsorption kinetic studies. | LitMetric

Smart pillar[5]arene-based PDMAEMA/PES beads for selective dye pollutants removal: design, synthesis, chemical-physical characterization, and adsorption kinetic studies.

ChemSusChem

Institute for the Study of Nanostructured Materials, ISMN - CNR, URT Messina, c/o Dep. ChiBioFarAm, University of Messina, Viale F. Stagno d'Alcontres 31, 98166, Messina, Italy.

Published: May 2024

AI Article Synopsis

  • - The article discusses the development of a new smart polymer, P5-QPDMAEMA, which combines properties of two existing materials to create functional beads for removing organic dyes from water.
  • - Using a Non-Induced Phase Separation process, the beads are designed for efficient adsorption of two dyes: cationic methylene blue and anionic methyl orange, achieving a 91.3% removal rate for methyl orange in acidic conditions.
  • - The study demonstrates that the adsorption process aligns best with pseudo-first order and Freundlich models, with the beads showing a maximum adsorption capacity of 21.54 mg/g, and introduces zwitterionic beads that can remove both dye types effectively.

Article Abstract

This article reports on the synthesis of an innovative smart polymer, P5-QPDMAEMA, opportunely developed with the aim of combining the responsiveness of PDMAEMA polymer and the host-guest properties of covalently linked pillar[5]arenes. Thanks to a traditional Non-Induced Phase Separation (NIPS) process performed at various coagulation pH, the blending of P5-QPDMAEMA with polyethersulfone gave rise to the formation of functional beads for the removal of organic dyes in water. Adsorption tests are carried out on all the produced blend-based beads by employing two representative dyes, the cationic methylene blue (MB), and the anionic methyl orange (MO). In particular, the P5-QPDMAEMA based beads, prepared at acidic pH, featured the best MO removal rate (i. e., 91.3 % after 150 minutes starting from a 20 mg ⋅ L solution) and a high selectivity towards the removal of the selected anionic dye. Based on the adsorption kinetics and isotherm calculations, the pseudo-first order and Freundlich models were shown to be the most suitable to describe the MO adsorption behavior, achieving a maximum adsorption capacity of 21.54 mg ⋅ g. Furthermore, zwitterionic beads are obtained by a post-functionalization of the PDMAEMA and the P5-QPDMAEMA based beads, to test their removal capability towards both anionic and cationic dyes, as shown.

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Source
http://dx.doi.org/10.1002/cssc.202301502DOI Listing

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