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Ultrafast removal of heavy metals by tin oxide nanowires as new adsorbents in solid-phase extraction technique

  • R. Alizadeh
  • R. K. Kazemi
  • M. R. Rezaei
Original Paper
  • 77 Downloads

Abstract

In the present research, the removal of lead(II) and copper(II) from aqueous solutions is studied, using SnO2 nanowires as new adsorbent on solid-phase extraction disk and compared with pine core and buttonwood as biosorbents. Batch adsorption experiments were performed as a function of pH, adsorption time, solute concentration and adsorbent dose for biosorbents. Also, the pH, transfer rate of solution and metal concentration were selected as experimental parameters for the removal of heavy metals by SnO2 nanowires. All of the parameters were optimized by experimental design method for sorbents. The experimental equilibrium adsorption data are tested for the Langmuir and Freundlich equations. Results indicate the following order to fit the isotherms: Langmuir > Freundlich, in case of lead and copper ions. The removal of Cu(II) and Pb(II) was performed by selected sorbents in the presence of interferences ions. This led to no remarkable decrease in the removal efficiency of SnO2 nanowires. Using the SnO2 nanowires in the wastewater treatment indicated 96.8 and 85.28% removal efficiency in only 7 min for Pb(II) and Cu(II), respectively. SnO2 nanowires were found as reusable sorbent. Therefore, SnO2 nanowires have a good potential for application in environmental protection.

Keywords

Factorial design Isotherms SnO2 nanowires Solid-phase extraction Ultrafast heavy metal removal 

Notes

Acknowledgements

The authors thank Iran National Science Foundation (INSF) for supporting the project (93012503) and Iran Nanotechnology Initiative Council.

Supplementary material

13762_2017_1481_MOESM1_ESM.docx (260 kb)
Supplementary material 1 (DOCX 260 kb)
13762_2017_1481_MOESM2_ESM.xlsx (23 kb)
Supplementary material 2 (XLSX 23 kb)

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Copyright information

© Islamic Azad University (IAU) 2017

Authors and Affiliations

  1. 1.Department of Chemistry, Faculty of ScienceUniversity of QomQomIran
  2. 2.Department of Environment, Faculty of Nature Resources and EnvironmentUniversity of BirjandBirjandIran

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