Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (6): 717-725.DOI: 10.11944/j.issn.1000-0518.2019.06.180302

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Preparation Solid Phase Extraction Packing Material Based on Ligand Bonded Montmorillonite and Its Performance on Heavy Metal Ion Adsorption

SHEN Shuchang(),PENG Cheng,WANG Di   

  1. Analytical and Testing Center of Qiqihar University,Qiqihar,Heilongjiang 161006,China
  • Received:2018-09-11 Accepted:2019-01-17 Online:2019-06-01 Published:2019-06-03
  • Contact: SHEN Shuchang
  • Supported by:
    Supported by the Special Research Project of Heilongjiang Province Education Office(No.135209221)

Abstract:

Montmorillonite surface was pickled, activated with silane coupling agent, bonded with benzoyl isothiocyanate to give a solid phase extraction(SPE) material. The structure and the morphology of this modified montmorillonite were characterized by infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy. Its adsorption performance toward As3+, Bi3+, Cu2+, Sb3+, Sn2+ and Pb2+ in water was also investigated, and the optimal solid-phase extraction conditions were determined. The adsorption capacities of this modified montmorillonite solid phase extraction packing material toward As3+, Bi3+, Cu2+, Sb3+, Sn2+ and Pb2+ were 10.83, 11.92, 12.67, 10.43, 10.01 and 10.54 mg/g, respectively. The contents of heavy metal ions in the samples were determined by SPE and ion couple plasma-mass spectrometry. The detection limits were 0.024, 0.013, 0.075, 0.037 and 0.011 μg/L, respectively.

Key words: montmorillonite bonded ligand, solid phase extraction, heavy metal ion, ion couple plasma-mass spectrometry