Chemical modification of amberlite XAD-2 by immobilization of calcein blue for extractive concentration of lead(II) ion in environmental samples

Elham Moniri, Homayon Ahmad Panahi, Meghdad Karimi, Nasir Ahmad Rajabi, mohammad faridi

Research output: Contribution to journalJournal articlepeer-review

3 Scopus citations

Abstract

A chelating resin is produced by coupling a dye calcein blue to Amberlite XAD-2 through an azo spacer. The resulting resin has been characterized by Fourier Transform Infrared (FT-IR) spectroscopy, elemental analysis, and thermogravimetric analysis and studied for the preconcentration and determination of trace Pb(II) from solution samples. The optimum pH for adsorption of lead ions was 6.5. The sorption capacity of functionalized resin is 40.22 mg g-1. The chelating resin can be reused for 10 cycles without any significant changes in the sorption capacity. A recovery of 100% was obtained for Pb(II) when eluted with 0.5 M nitric acid. Scatchard analysis revealed that homogeneous binding sites were formed in the resin. The equilibrium adsorption data of Pb(II) on a modified resin were analyzed using the Langmuir, Freundlich, and Temkin models. Based on equilibrium adsorption data, the Langmuir, Freundlich, and Temkin constants were determined as 0.044, 4.127, and 0.540, respectively, at pH 6.5 and 20°C. The method was applied for the Pb(II) assay in environmental samples.

Original languageEnglish
Pages (from-to)E462-E473
JournalAdvances in Polymer Technology
Volume32
Issue numberSUPPL.1
DOIs
StatePublished - Mar 2013
Externally publishedYes

Keywords

  • Amberlite XAD-2
  • Determination
  • Isotherm study
  • Lead
  • Solid phase extraction

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