Browsing Araştırma Çıktıları / Scopus by Author "Tan, Nükhet"
Now showing items 1-4 of 4
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A glycidyl methacrylate-based resin with pendant urea groups as a high capacity mercury specific sorbent
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Publisher and Date:(Elsevier Science Bv, 2003)Polymer-supported pendant urea groups have been demonstrated to be very efficient in selective removal of mercuric ions from aqueous solutions. Methyl methacrylate (0.5 mol)-glycidyl methacrylate (0.4 mol)-divinylbenzene (0.1 mol) terpolymer beads have been prepared by suspension polymerisation. Urea functions have been incorporated into the bead polymer (210-420 mum) via a two-step modification of the epoxy groups involving firstly reaction with excess of triethylenetetramine followed by acidic ...
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Chelate extraction of transition metal ions by ethylene diamine diacetic acid with n-substituted octadecyl groups
Authors:
Publisher and Date:(Taylor & Francis Inc, 2002)An organic-soluble chelating agent NN'-di-n-octadecyl ethylenediamine-NN'-diacetic acid (DOED) has been synthesized in two steps by (i) condensation of dibromoethane with 1-amino octadecane (octadecylamine) and (ii) subsequent reaction with sodium chloro acetate in alcohol-water mixture. The chelating agent in 2-ethylhexanol-cyclohexanol (1:1) solutions shows extremely high chelating ability for Ni(II) Co(II) Cu(II) Fe(111) Cr(III) and Cd(II) ions in neutral aqueous solutions. Extractions take ...
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Metalization of polymer beads via polymer-supported hydrazines as reducing agents
Authors:
Publisher and Date:(John Wiley & Sons Inc, 2002)A new method for depositing metal onto a polymer surface has been developed in which the metal coating of polymer beads is performed with hydrazine functions as reducing agents on the surface of the polymer itself. In this study glycidyl methacrylate-methyl methaerylate-divinyl benzene terpolymer was prepared as spherical beads with a suspension polymerization methodology. Beads of the polymer sample (210-420-mum fraction) containing 3.4 mmol g(-1) epoxy were treated with an excess of hydrazinium ...
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Selective liquid-liquid extraction of mercuric ions by octyl methane sulfonamide
Authors:
Publisher and Date:(Marcel Dekker Inc, 2003)N-octyl methane sulfonamide (OMSA) has been demonstrated to be a very efficient reagent for selective extraction of Hg(II) ions from aqueous solutions. The extraction bases on rapid reaction of OMSA with Hg(II) ions yielding mono and disulfonamido mercury compounds in ordinary conditions. Solubility of OMSA and its mercury compounds in 2-ethyl hexanol provide a clear-cut phase separation in the extraction. The solution of OMSA in 2-ethyl hexanol (0.4 mol L-1) is able to extract 82.2% of mercuric-acetate ...
