Please use this identifier to cite or link to this item: http://hdl.handle.net/11452/20864
Title: Poly(ethylene glycol dimethacrylate-n-vinyl imidazole) beads for heavy metal removal
Authors: Uzun, Lokman
Denizli, Adil
Bursa Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Bölümü.
Kara, Ali
Beşirli, Necati
AAG-6271-2019
Keywords: Heavy metal removal
Chelating beads
N-vinyl imidazole
Cadmium(II)
Lead(II)
Mercury(II)
Aqueous-solutions
Complexing-ligand
Ions
Adsorption
Water
Separation
Mercury
Complexation
Microspheres
Cadmium(II)
Engineering
Environmental sciences & ecology
Issue Date: 30-Jan-2004
Publisher: Elsevier Science Bv
Citation: Uzun, L. vd. (2004). “Poly(ethylene glycol dimethacrylate-n-vinyl imidazole) beads for heavy metal removal”. Journal of Hazardous Materials, 106(2-3), 93-99.
Abstract: Poly(ethylene glycol dimethacrylate-n-vinyl imidazole) [poly(EGDMA-VIM)] hydrogel (average diameter 150-200 mum) was prepared by copolymerizing ethylene glycol dimethacrylate (EGDMA) with n-vinyl imidazole (VIM). The copolymer hydrogel bead composition was characterized by elemental analysis and found to contain 5 EGDMA monomer units each VIM monomer unit. Poly(EGDMA-VIM) beads had a specific surface area of 59.8 m(2)/g. Poly(EGDMA-VIM) beads were characterized by swelling studies and scanning electron microscopy (SEM). These poly(EGDMA-VIM) beads with a swelling ratio of 78% were used for the heavy metal removal studies. Chelation capacity of the beads for the selected metal ions, i.e., Cd(II), Hg(II) and Pb(II) were investigated in aqueous media containing different amounts of these ions (10-750 mg/l) and at different pH values (3.0-7.0). Chelation rate was very fast. The maximum chelation capacities of the poly(EGDMA-VIM) beads were 69.4 mg/g for Cd(H), 114.8 mg/g for Pb(II) and 163.5 mg/g for Hg(II). The affinity order on molar basis was observed as follows: Hg(H) > Cd(II) > Pb(II). Chelation behavior of heavy metal ions could be modelled using both the Langmuir and Freundlich isotherms. pH significantly affected the chelation capacity of VIM incorporated beads. Chelation of heavy metal ions from synthetic wastewater was also studied. The chelation capacities are 45.6 mg/g for U(II), 74.2 mg/g for Hg(H) and 92.5 mg/g for Pb(II) at 0.5 mmol/l initial metal concentration. Regeneration of the chelating-beads was easily performed with 0.1 M HNO3. These features make poly(EGDMA-VIM) beads potential candidate adsorbent for heavy metal removal: (C) 2003 Elsevier B.V. All rights reserved.
URI: https://doi.org/10.1016/j.jhazmat.2003.08.016
https://www.sciencedirect.com/science/article/pii/S0304389403003972
http://hdl.handle.net/11452/20864
ISSN: 0304-3894
Appears in Collections:Web of Science

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