A comparison study of peach stone and acrylonitrile-divinylbenzene copolymer based activated carbons as chromium(VI) sorbents


Duranoglu D. , Trochimczuk A. W. , Beker U.

CHEMICAL ENGINEERING JOURNAL, cilt.165, ss.56-63, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 165
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/j.cej.2010.08.054
  • Dergi Adı: CHEMICAL ENGINEERING JOURNAL
  • Sayfa Sayıları: ss.56-63

Özet

Two activated carbons were produced by using two different precursor peach stone and acrylonitrile-divinylbenzene copolymer Peach stone based activated carbon was produced by single step steam activation at 800 degrees C polymer based activated carbon was prepared in successive two stages air oxidation at 300 C and final carbonization at 850 C under inert atmosphere Produced carbons showed typical Type 1 nitrogen adsorption isotherms Peach stone based activated carbon has 608 m(2)/g of surface area and 0 331 cm(3)/g of micropore volume while polymer based carbon has 579 m(2)/g of surface area and 0 234 cm(3)/g of micropore volume Boehm s titration results and Fourier transform infrared spectra indicated that the produced carbons possess acidic oxygen functionalities mainly in phenolic form Polymer based activated carbon has 7 12 mmol of nitrogen/g because of the pyridine type groups in the main structure The removal of Cr(VI) from aqueous solutions by activated carbon has been investigated as a function of solution pH The maximum adsorption capacities were obtained at pH 2 in both cases and the maximum capacities were 143 mg/g 83 mg/g and 150 mg/g for peach stone based polymer based and commercial activated carbons respectively