By the suspended condensation reaction of poly(choloromethyl thiirane) with o-tolidine and o-dianisidine respectively, two new microbeads of magnetic chelating resins were synthesized by usingγ-Fe2O3 as magnetic core. Their adsorption properties for Hg(Ⅱ), Cu(Ⅱ), Zn(Ⅱ), Pb(Ⅱ), Au(Ⅲ), Pd(Ⅱ), Pt(Ⅳ) and Ag(Ⅰ) were investigated. The microbeads possess excellent adsorbability for Hg(II) and noble metal ions, and predominantly adsorbed Pd(Ⅱ) or Hg(Ⅱ) in the coexistence of Cu(Ⅱ), Zn(Ⅱ) and Mg(Ⅱ). The experimental results demonstrate that resin II with lower N and S contents has higher adsorption capacities for noble metal ions than resin I, which shows the dianisidine group in resin II plays an important role in the adsorption, due to the synergistic effects of methoxyl and amino group in adjacent position.
参考文献
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