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Dithiocarbamate‐incorporated monodisperse polystyrene microspheres as specific sorbents: Adsorption of cadmium ions
Author(s) -
Pişkin Erhan,
Kesenci Kemal,
Şatiroǧlu Nuray,
Geņ Ömer
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960103)59:1<109::aid-app16>3.0.co;2-v
Subject(s) - dithiocarbamate , dispersion polymerization , adsorption , dispersity , chemistry , polystyrene , aqueous solution , nuclear chemistry , divinylbenzene , polymerization , sorbent , polymer chemistry , polyvinylpyrrolidone , copolymer , styrene , organic chemistry , polymer
In this study, adsorption of cadmium ions from aqueous solutions by using dithiocarbamate‐incorporated monodisperse crosslinked polystyrene (PS)‐based sorbents was investigated. Monodisperse PS microspheres with a diameter of 2 μm were produced by dispersion polymerization of styrene in isopropyl alcohol/water by using polyvinylpyrrolidone and azobisisobutyronitrile as stabilizer and initiator, respectively. These microspheres were then crosslinked by using divinylbenzene. In order to incorporate dithiocarbamate functional groups on the PS microsphere, first benzylamine was physically absorbed, then the amine groups were transformed into dithiocarbamate groups by interacting these microspheres with carbon disulphide. These PS‐based sorbents carrying physically entrapped benzyl dithiocarbamate were characterized by scanning electron microscopy, optical microscopy, FTIR, and elemental analysis. Adsorption of cadmium ions on the PS‐based sorbents were investigated in the batch equilibrium experiments by using atomic absorption spectrophotometer. Adsorption rates were very fast. Adsorption equilibria were achieved within 5‐60 min. The highest adsorption capacity achieved was 154.1 mg cadmium/g sorbent. The most suitable pH was 6.0. © 1996 John Wiley & Sons, Inc.