Metal sorption on macroporous poly(GMA-co-EGDMA) modified with ethylene diamine |
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| Affiliation: | 1. Institute of Chemistry, Technology and Metallurgy, Center for Chemistry, Njego?eva 12, Belgrade 11001, Serbia and Montenegro;2. Faculty of Technology and Metallurgy, Karnegijeva 4, Belgrade 11001, Serbia and Montenegro;3. Vin?a Institute of Nuclear Sciences, Chemical Dynamics Laboratory, P.O. Box 522, Belgrade 11001, Serbia and Montenegro;4. Institute of Chemistry, Technology and Metallurgy, Center for Catalysis and Chemical Engineering, Njego?eva 12, Belgrade 11001, Serbia and Montenegro;1. Qualisteo Company, Nice, France;2. AMU-CNRS, IM2NP UMR 7334, Marseille, France;3. EpOC, URE UNS 006, Sophia Antipolis, France;1. Shaanxi Collaborative Innovation Center of Chinese Medicinal Resource Industrialization, School of Pharmacy, Shaanxi College of Traditional Chinese Medicine, Xianyang 712046, China;2. Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine, Collaborative Innovation Center for Chinese Medicine in Qinba Mountains, School of Pharmacy, The Fourth Military Medical University, Xi’an 710032, China;3. The First Hospital of Xi’an, Xi’an 710002, China |
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| Abstract: | Two samples of macroporous crosslinked poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate), poly(GMA-co-EGDMA), with different porosity parameters were synthesized by suspension copolymerization and modified by ring-opening reaction of the pendant epoxy groups with ethylene diamine (EDA). The samples were characterized by mercury porosimetry, FT-IR spectroscopy and elemental analysis. The sorption rate of the modified copolymer, poly(GMA-co-EGDMA)-en for Cu(II) ions determined under non-competitive conditions was relatively rapid, i.e. the maximum capacity was reached within 30 min. Batch sorption capacities for Cu(II), Fe(II), Mn(II), Cd(II), Zn(II), Pb(II), Cr(III) and Pt(IV) ions were determined under non-competitive conditions in the pH range 1.25–5.5 at room temperature. The maximum sorption capacities of poly(GMA-co-EGDMA)-en under non-competitive conditions were 1.30 mmol/g for Pt(IV) at pH 5.5, 1.10 mmol/g for Cu(II) at pH 5.5, 1.06 mmol/g for Pb(II) at pH 1.25 and 0.67 mmol/g for Cd(II) ions at pH 5.5. The selectivity of poly(GMA-co-EGDMA)-en towards Cu(II), Co(II), Ni(II), Pb(II) and Pt(IV) ions was investigated under competitive conditions. Poly(GMA-co-EGDMA)-en showed high selectivity for Pt(IV) over Cu(II), Co(II), Ni(II) and Pb(II) ions at pH 2.1. At pH 5.5, the metal sorption capacities of poly(GMA-co-EGDMA)-en decreased in the order: Cu(II) > Co(II) > Pt(IV) ≈ Ni(II) > Pb(II). Regeneration of the Cu(II), Ni(II) and Pb(II) loaded poly(GMA-co-EGDMA)-en with 2 M H2SO4 showed that the polymer can be reused in several sorption/desorption cycles. |
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