Clay-bionanocomposites with sacran megamolecules for the selective uptake of neodymium

Ana C S Alcântara, Margarita Darder, Pilar Aranda, Seiji Tateyama, Maiko K. Okajima, Tatsuo Kaneko, Makoto Ogawa, Eduardo Ruiz-Hitzky

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Sacran, an anionic megamolecular polysaccharide extracted from the cyanobacterium Aphanothece sacrum, is an interesting biopolymer for developing functional clay-based bionanocomposites due to its colloidal and metal complexing properties. This work introduces novel bionanocomposites based on the assembly of sacran to sepiolite, a fibrous hydrated magnesium silicate, reporting some of their special features. Sacran-sepiolite films show tensile moduli about twice that of neat sacran films, and improved resistance and integrity in aqueous solutions. These materials can act as adsorbents of lanthanide ions, profiting from the well-known adsorption properties of sepiolite and the ability of sacran to complex rare earth and heavy metal ions. Sacran-sepiolite materials show a clear preference for Nd3+ ions over Ce3+, Eu3+ and Gd3+, and the results confirm the influence of the conformation of sacran chains in crystalline domains on the adsorption properties. In fact, only those materials prepared from concentrated sacran solutions, with the polysaccharide chains arranged as liquid crystals, and involving around 27% (w/w) of sepiolite showed a remarkable synergistic effect on the retention of Nd3+ ions, being promising as biosorbents for the effective and selective recovery of neodymium from aqueous media.

Original languageEnglish
Pages (from-to)1391-1399
Number of pages9
JournalJournal of Materials Chemistry A
Volume2
Issue number5
DOIs
Publication statusPublished - 2014 Feb 7

Fingerprint

Neodymium
Clay
Polysaccharides
Ions
Adsorption
Biopolymers
Rare earth elements
Heavy ions
Liquid crystals
Adsorbents
Rare earths
Heavy metals
Silicates
Metal ions
Magnesium
Conformations
Elastic moduli
Crystalline materials
Recovery
Rare Earth Metals

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Alcântara, A. C. S., Darder, M., Aranda, P., Tateyama, S., Okajima, M. K., Kaneko, T., ... Ruiz-Hitzky, E. (2014). Clay-bionanocomposites with sacran megamolecules for the selective uptake of neodymium. Journal of Materials Chemistry A, 2(5), 1391-1399. https://doi.org/10.1039/c3ta14145d

Clay-bionanocomposites with sacran megamolecules for the selective uptake of neodymium. / Alcântara, Ana C S; Darder, Margarita; Aranda, Pilar; Tateyama, Seiji; Okajima, Maiko K.; Kaneko, Tatsuo; Ogawa, Makoto; Ruiz-Hitzky, Eduardo.

In: Journal of Materials Chemistry A, Vol. 2, No. 5, 07.02.2014, p. 1391-1399.

Research output: Contribution to journalArticle

Alcântara, ACS, Darder, M, Aranda, P, Tateyama, S, Okajima, MK, Kaneko, T, Ogawa, M & Ruiz-Hitzky, E 2014, 'Clay-bionanocomposites with sacran megamolecules for the selective uptake of neodymium', Journal of Materials Chemistry A, vol. 2, no. 5, pp. 1391-1399. https://doi.org/10.1039/c3ta14145d
Alcântara ACS, Darder M, Aranda P, Tateyama S, Okajima MK, Kaneko T et al. Clay-bionanocomposites with sacran megamolecules for the selective uptake of neodymium. Journal of Materials Chemistry A. 2014 Feb 7;2(5):1391-1399. https://doi.org/10.1039/c3ta14145d
Alcântara, Ana C S ; Darder, Margarita ; Aranda, Pilar ; Tateyama, Seiji ; Okajima, Maiko K. ; Kaneko, Tatsuo ; Ogawa, Makoto ; Ruiz-Hitzky, Eduardo. / Clay-bionanocomposites with sacran megamolecules for the selective uptake of neodymium. In: Journal of Materials Chemistry A. 2014 ; Vol. 2, No. 5. pp. 1391-1399.
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