Removal of cadmium from aqueous solutions using inorganic porous nanocomposites

Cătălin Ianăşi, Mirela Picioruş, Roxana Nicola, Mihaela Ciopec, Adina Negrea, Daniel Nižňanský, Adél Len, L. Almásy, Ana Maria Putz

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The present paper reports a one-pot synthesis of magnetic nanocomposites samples through acid catalyzed sol-gel method. Fe(III) acetylacetonate was used as precursor of the iron oxide phase: tetraethylortosilicate for the silica phase and polyvinyl alcohol (PVA, molecular mass 49000) as pore former. Different concentrations of Fe 2 O 3 in composites matrices were prepared and studied ranging from 0% to 20%. All reactions took place in one pot at room temperature; the materials were subsequently heat treated at 300°C, to ensure the crystallinity for the iron oxide having spinel structure, forming nanoparticles confined in the silica matrix. The materials were characterized using X-ray diffraction, small-angle neutron scattering, FT-IR spectroscopy, nitrogen adsorption, Mössbauer spectroscopy and magnetization measurements. The maximum value of room temperature saturation magnetization of ∼54 emu/g and 0.11 kOe coercive field was achieved for the magnetic nanocomposite sample with 20% Fe 2 O 3 . The highest surface area of 680m 2 /g was obtained for the sample with 10% Fe 2 O 3 . The potential applicability of the obtained materials was studied for adsorption performance for cadmium in aqueous solutions. The Langmuir isotherm model described well the adsorption data, indicating monolayer adsorption of Cd(II) on the heterogeneous composite surface.

Original languageEnglish
Pages (from-to)688-700
Number of pages13
JournalKorean Journal of Chemical Engineering
Volume36
Issue number5
DOIs
Publication statusPublished - May 1 2019

Fingerprint

Cadmium
Nanocomposites
Adsorption
Iron oxides
Silicon Dioxide
Silica
Polyvinyl Alcohol
Polyvinyl alcohols
Composite materials
Molecular mass
Saturation magnetization
Neutron scattering
Sol-gel process
Isotherms
Infrared spectroscopy
Monolayers
Magnetization
Nitrogen
Spectroscopy
Nanoparticles

Keywords

  • Adsorption
  • Cadmium
  • Iron Oxide
  • PVA
  • Sol-gel

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Ianăşi, C., Picioruş, M., Nicola, R., Ciopec, M., Negrea, A., Nižňanský, D., ... Putz, A. M. (2019). Removal of cadmium from aqueous solutions using inorganic porous nanocomposites. Korean Journal of Chemical Engineering, 36(5), 688-700. https://doi.org/10.1007/s11814-019-0262-6

Removal of cadmium from aqueous solutions using inorganic porous nanocomposites. / Ianăşi, Cătălin; Picioruş, Mirela; Nicola, Roxana; Ciopec, Mihaela; Negrea, Adina; Nižňanský, Daniel; Len, Adél; Almásy, L.; Putz, Ana Maria.

In: Korean Journal of Chemical Engineering, Vol. 36, No. 5, 01.05.2019, p. 688-700.

Research output: Contribution to journalArticle

Ianăşi, C, Picioruş, M, Nicola, R, Ciopec, M, Negrea, A, Nižňanský, D, Len, A, Almásy, L & Putz, AM 2019, 'Removal of cadmium from aqueous solutions using inorganic porous nanocomposites', Korean Journal of Chemical Engineering, vol. 36, no. 5, pp. 688-700. https://doi.org/10.1007/s11814-019-0262-6
Ianăşi C, Picioruş M, Nicola R, Ciopec M, Negrea A, Nižňanský D et al. Removal of cadmium from aqueous solutions using inorganic porous nanocomposites. Korean Journal of Chemical Engineering. 2019 May 1;36(5):688-700. https://doi.org/10.1007/s11814-019-0262-6
Ianăşi, Cătălin ; Picioruş, Mirela ; Nicola, Roxana ; Ciopec, Mihaela ; Negrea, Adina ; Nižňanský, Daniel ; Len, Adél ; Almásy, L. ; Putz, Ana Maria. / Removal of cadmium from aqueous solutions using inorganic porous nanocomposites. In: Korean Journal of Chemical Engineering. 2019 ; Vol. 36, No. 5. pp. 688-700.
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