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Environmental Monitoring and Assessment

, Volume 186, Issue 11, pp 7245–7257 | Cite as

Monitoring of trace amounts of heavy metals in different food and water samples by flame atomic absorption spectrophotometer after preconcentration by amine-functionalized graphene nanosheet

  • Mohammad BehbahaniEmail author
  • Nasim Akbari Ghareh Tapeh
  • Mojtaba Mahyari
  • Ali Reza Pourali
  • Bahareh Golrokh Amin
  • Ahmad Shaabani
Article

Abstract

We are introducing graphene oxide modified with amine groups as a new solid phase for extraction of heavy metal ions including cadmium(II), copper(II), nickel(II), zinc(II), and lead(II). Effects of pH value, flow rates, type, concentration, and volume of the eluent, breakthrough volume, and the effect of potentially interfering ions were studied. Under optimized conditions, the extraction efficiency is >97 %, the limit of detections are 0.03, 0.05, 0.2, 0.1, and 1 μg L−1 for the ions of cadmium, copper, nickel, zinc, and lead, respectively, and the adsorption capacities for these ions are 178, 142, 110, 125, and 210 mg g−1. The amino-functionalized graphene oxide was characterized by thermogravimetric analysis, transmission electron microscopy, scanning electron microscopy, and Fourier transform infrared spectrometry. The proposed method was successfully applied in the analysis of environmental water and food samples. Good spiked recoveries over the range of 95.8–100.0 % were obtained. This work not only proposes a useful method for sample preconcentration but also reveals the great potential of modified graphene as an excellent sorbent material in analytical processes.

Keywords

Amine-functionalized graphene oxide Food and water samples Solid phase extraction Preconcentration Heavy metals 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Mohammad Behbahani
    • 1
    Email author
  • Nasim Akbari Ghareh Tapeh
    • 2
  • Mojtaba Mahyari
    • 1
  • Ali Reza Pourali
    • 2
  • Bahareh Golrokh Amin
    • 1
  • Ahmad Shaabani
    • 1
  1. 1.Department of ChemistryShahid Beheshti UniversityTehranIran
  2. 2.Faculty of ChemistryDamghan UniversityDamghanIran

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