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Highly Efficient Copper(II) Ion Sorbents Obtained by Calcium Carbonate Mineralization on Functionalized Cross‐Linked Copolymers
Author(s) -
Mihai Marcela,
Bunia Ion,
Doroftei Florica,
Varganici CristianDragos,
Simionescu Bogdan C.
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201406011
Subject(s) - sorption , copper , copolymer , mineralization (soil science) , fourier transform infrared spectroscopy , chemistry , nuclear chemistry , acrylonitrile , materials science , chemical engineering , inorganic chemistry , polymer chemistry , adsorption , polymer , organic chemistry , nitrogen , engineering
A new type of Cu II ion sorbents is presented. These are obtained by CaCO 3 mineralization from supersaturated solutions on gel‐like cross‐linked polymeric beads as insoluble templates. A divinylbenzene–ethylacrylate–acrylonitrile cross‐linked copolymer functionalized with weakly acidic, basic, or amphoteric functional groups has been used, as well as different initial inorganic concentrations and addition procedures for CaCO 3 crystal growth. The morphology of the new composites was investigated by SEM and compared to that of the unmodified beads, and the polymorph content was established by X‐ray diffraction. The beads, before and after CaCO 3 mineralization, were tested as sorbents for Cu II ions. The newly formed patterns on the bead surface after Cu II sorption were observed by SEM, and the elemental distribution on the composites and the chemical structure of crystals after interaction with Cu II were investigated by EDAX elemental mapping and by FTIR‐ATR spectroscopy, respectively. The sorption capacity increased significantly after CaCO 3 crystals growth on the weak anionic bead surface (up to 1041.5 mg Cu II /g sample) compared to that of unmodified beads (491.5 mg Cu II /g sample).