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Pb(II) Ion-Imprinted Micro-Porous Particles for the Selective Separation of Pb(II) Ions

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Pb(II) ion-imprinted micro-porous particles were prepared from the ionic complexes formed between vinyl pyridine functional monomers and template Pb(II) ions. The self-assembled Pb(II)/monomer complex was suspension polymerized in the presence of divinylbenzene cross-linker. The prepared micro-particles were 400∼600 μm in size. Their chemical and physical structures, morphologies, and adsorption capacity were analyzed by energy dispersive X-ray spectrometry (EDX) Brunauer–Emmett–Teller (BET) analysis, scanningelectron microscopy (SEM), and atomic adsorption spectroscopy (AAS). The adsorption capacity of the imprinted polymer for the Pb(II) template ions was significantly affected by the initial concentration and the pH of the feed solution. Adsorptionis rapid in the first 1 h, after which it slowly increases to equilibrium. The imprinted particles showed high selectivity for lead ions; the adsorption capacity for the Pb(II) ions, 28 mg g−1 polymer, was much higher than those for other metal ions such as Ni(II)Zn(II), Fe(II), or Cd(II). The imprinted particles maintain high standards of their adsorption ability after 10 repeated uses.
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Document Type: Research Article

Publication date: November 1, 2014

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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