title: Synthesis of diethylaminoethyl dextran hydrogel and its heavy metal ion adsorption characteristics.
abstract: Epichlorohydrin-crosslinked diethylaminoethyl dextran (DEAE-D/ECH) hydrogel was synthesized by intermolecular side-chain reaction of DEAE-D hydroxyl groups with monomeric crosslinking agent, ECH. Swelling ability, adsorption capacity and metal removal of the hydrogel were profoundly determined and some structural parameters for the hydrogel such as volume of non-swollen gel, percentages of gellation, swelling ratio and equilibrium water content were evaluated in this study. The ability of removing heavy metal ions from Orontes River by the synthesized hydrogel, thoroughly characterized by photometric spectrometer and the adsorption characteristics of metal ions, was investigated as well as surface morphologies of the hydrogel before and after metal adsorption were examined by SEM. Structure of DEAE-D/ECH gel was analyzed by FTIR, TGA, and DSC. Gellation point of binary system reaction between DEAE-D and ECH was determined via monitoring viscosity changes during reaction. The order of affinity based on amount of metal ion uptake was found as follows: Zn(2+)>Mn(2+)>Pb(2+)>Cd(2+).
authors: Department of Chemistry, Division of Physical Chemistry, Faculty of Arts and Science, Mustafa Kemal University, TR-31034 Antakya, Turkey.
authors: Celile
authors: C
authors: Demirbilek
authors: Cemile Özdemir
authors: CÖ
authors: Dinç
mesh_terms: D000327:Adsorption; D003432:Cross-Linking Reagents / Q000737:chemistry; D003637:DEAE-Dextran / Q000138:chemical synthesis / Q000737:chemistry* / Q000493:pharmacokinetics; D004811:Epichlorohydrin / Q000737:chemistry; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000138:chemical synthesis* / Q000737:chemistry / Q000493:pharmacokinetics*; D007477:Ions / Q000302:isolation & purification / Q000493:pharmacokinetics; D019216:Metals, Heavy / Q000302:isolation & purification / Q000493:pharmacokinetics*; D008855:Microscopy, Electron, Scanning; D008954:Models, Biological; D017550:Spectroscopy, Fourier Transform Infrared; D014783:Viscosity; D014867:Water / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000493:pharmacokinetics; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
chemical_list: D003432:Cross-Linking Reagents; D007477:Ions; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D014867:Water; D004811:Epichlorohydrin; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D003637:DEAE-Dextran