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Magnetic Poly(vinylpyridine)-Coated Carbon Nanotubes: An Efficient Supramolecular Tool for Wastewater Purification

  1. Dr. Laura Maggini1,
  2. Dr. Jean-Marie Raquez2,
  3. Dr. Riccardo Marega1,
  4. Jennifer Jensen Ahrens1,
  5. Florent Pineux1,
  6. Dr. Franck Meyer2,
  7. Prof. Philippe Dubois2,*,
  8. Prof. Davide Bonifazi1,3,*

Article first published online: 13 DEC 2012

DOI: 10.1002/cssc.201200413

Issue

ChemSusChem

ChemSusChem

Volume 6, Issue 2, pages 367–373, February 2013

Additional Information

How to Cite

Maggini, L., Raquez, J.-M., Marega, R., Jensen Ahrens, J., Pineux, F., Meyer, F., Dubois, P. and Bonifazi, D. (2013), Magnetic Poly(vinylpyridine)-Coated Carbon Nanotubes: An Efficient Supramolecular Tool for Wastewater Purification. ChemSusChem, 6: 367–373. doi: 10.1002/cssc.201200413

Author Information

  1. 1

    Department of Chemistry, University of Namur (FUNDP), Rue de Bruxelles 61, 5000 Namur (Belgium), Fax:(+32) 081-725433

  2. 2

    Laboratory of Polymeric and Composite Materials, Center of Innovation and Research in Materials and Polymers, University of Mons, Place du Parc 23, 7000 Mons (Belgium)

  3. 3

    Department of Chemical and Pharmaceutical Sciences and INSTM UdR Trieste, University of Trieste, Piazzale Europa 1, 34127 Trieste (Italy)

*Laboratory of Polymeric and Composite Materials, Center of Innovation and Research in Materials and Polymers, University of Mons, Place du Parc 23, 7000 Mons (Belgium)

Publication History

  1. Issue published online: 6 FEB 2013
  2. Article first published online: 13 DEC 2012
  3. Manuscript Revised: 2 AUG 2012
  4. Manuscript Received: 16 JUN 2012

Funded by

  • EU. Grant Number: PITN-GA-2008-215399
  • FEDER/FSE
  • FRS-FNRS. Grant Numbers: 2.4.550.09, 2.4.617.07.F, F.4.505.10.F
  • Loterie Nationale
  • Région Wallonne. Grant Number: SUNTUBE, 850551
  • TINTIN ARC project. Grant Number: 09/14-023
  • Universities of Namur
  • Trieste
  • Belgian Federal Government Office Policy of Science (SSTC). Grant Number: PAI-6/27

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Keywords:

  • carbon;
  • environmental chemistry;
  • lead;
  • nanotubes;
  • zinc

Abstract

Herein, we report the first example of a supramolecular carbon nanotube (CNT)-based magnetic depolluting agent for divalent metal ion (M2+) removal from aqueous solutions. In particular, magnetic multi-walled carbon nanotubes (m-MWCNTs) coated with poly(vinylpyridine) (PVPy) self-aggregate in aqueous solutions that contain divalent metal ions (such as Zn2+, Cu2+ and Pb2+) to form tight insoluble bundles in which the M2+ ions remain trapped through pyridyl–M2+–pyridyl interactions. Magnetic filtration ultimately affords the efficient separation of the depolluted solution from the precipitated M2+-CNT agglomerates. Upon acid treatment, the supramolecular threads could be disassembled to afford the free CNT–polymer hybrid, thus allowing recycling of the depolluting agent. All materials and complexation/decomplexation steps were thoroughly characterised by using thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), transmission and scanning electron microscopy (TEM and SEM, respectively). The quantification of the M2+ residual concentrations in water was evaluated by using inductively coupled plasma optical emission spectroscopy (ICP-OES), which showed that, depending on the metal cation, this material can remove up to 99 % of the contaminant.

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