Cellulose

, Volume 19, Issue 3, pp 913–923

New promising composite materials useful in the adsorption of Cu(II) in ethanol based on cellulose and cellulose acetate

  • Hérica A. Magosso
  • Natália Fattori
  • Leliz T. Arenas
  • Yoshitaka Gushikem
Original Paper

DOI: 10.1007/s10570-012-9657-9

Cite this article as:
Magosso, H.A., Fattori, N., Arenas, L.T. et al. Cellulose (2012) 19: 913. doi:10.1007/s10570-012-9657-9

Abstract

This work describes for the first time the synthesis and characterization of new promising materials based on cellulose (Cel) and cellulose acetate (Celac), previously modified with aluminum oxide (CelAl and CelacAl) and post functionalized with 1,4-diazabicyclo [2.2.2] octane-n-propyltrimethoxysilane chloride (SiDbCl2), resulting the chemically modified hybrid materials CelAl/SiDbCl2 and CelacAl/SiDbCl2. The materials have shown to be useful in the adsorption of CuCl2 from ethanol, presenting high effective adsorption capacity. In the adsorption process, the copper ions diffuse into the solid solution interface and are retained as anionic complexes CuCl3 or CuCl42−. An expressive effective adsorption capacity tQ, as well as the stability constants β1 and β2, were found for both adsorbents: (a) CelAl/DbCl2: tQ = 0.33 × 10−3 mol g−1, log β1 = 4.23 (±0.04) and log β2 = 6.99 (±0.03); (b) CelacAl/DbCl2: tQ = 0.48 × 10−3 mol g−1, log β1 = 5.1 (±0.1) and log β2 = 8.3 (±0.1). Both adsorbent materials are potentially useful in the pre-concentration and further analysis of Cu(II) present in trace amounts in ethanol, extensively used as an automotive fuel in Brazil. Regeneration of the adsorbents requires a very simple procedure consisting in their immersion in aqueous solution which causes the immediate release of the Cu(OH2)n2+ species to the solution phase.

Keywords

CelluloseCellulose acetateAnionic copper complexesStability constants

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Hérica A. Magosso
    • 2
  • Natália Fattori
    • 1
  • Leliz T. Arenas
    • 3
  • Yoshitaka Gushikem
    • 1
  1. 1.Institute of ChemistryState University of Campinas, UNICAMPCampinasBrazil
  2. 2.Department of ChemistrySanta Catarina Federal UniversityFlorianópolisBrazil
  3. 3.Institute of ChemistryRio Grande do Sul Federal UniversityPorto AlegreBrazil