Microchimica Acta

, Volume 175, Issue 3–4, pp 315–322 | Cite as

A nanocomposite made from conducting organic polymers and multi-walled carbon nanotubes for the adsorption and separation of gold(III) ions

  • Mohammad Reza Nabid
  • Roya Sedghi
  • Roya Hajimirza
  • Hossein Abdi Oskooie
  • Majid M. Heravi
Original Paper
First Online:
Received:
Accepted:

Abstract

We describe a new method for the separation and preconcentration of traces of Au(III) in environmental samples. Sorbents made from modified multiwalled carbon nanotubes and conducting polymers (PANI and PEDOT) were used for solid-phase extraction. The Au(III) ions are adsorbed as a result of the interaction with the electron pairs of =N- and -S- groups. Effects of pH value, flow rate and volume of sample, type, volume and concentration of eluent, and the adsorption capacity were investigated. The maximum adsorption capacity of MWCNTs/PANI and MWCNTs/PEDOT are 159 and 176 mg g−1, and the detection limits of this method are below 0.3 and 0.5 ng mL−1, respectively. The procedure was successfully applied to the determination of traces of Au(III) in a reference material and in environmental samples.

Figure

The multiwalled carbon nanotubes/conducting polymers (PANI and PEDOT) were used for solid-phase extraction of Au(III) ions. The Au(III) adsorbed on macromolecules chains; resulting from sharing an electron pair of = N– and –S– groups of conducting polymers with gold ions. The final results demonstrate that nanocomposites are convenient for preconcentration and determination of gold from environmental samples.

Keywords

MWCNTs/PANI nanocomposite MWCNTs/PEDOT nanocomposite Solid phase extraction Gold 
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Notes

Acknowledgements

Special thanks to Dr. Shant Shahbazian for his assistance in preparing the manuscript. We gratefully acknowledge financial support from the Research Council of Shahid Beheshti University.

Supplementary material

604_2011_680_MOESM1_ESM.doc (96 kb)
ESM 1 (DOC 95 kb)

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Mohammad Reza Nabid
    • 1
  • Roya Sedghi
    • 1
    • 2
  • Roya Hajimirza
    • 1
  • Hossein Abdi Oskooie
    • 2
  • Majid M. Heravi
    • 2
  1. 1.Department of ChemistryShahid Beheshti UniversityTehranIran
  2. 2.Department of Chemistry, School of ScienceAzzahra UniversityTehranIran

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