Carbon letters

  • Volume 21
  • /
  • Pages.81-85
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  • 2017
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  • 1976-4251(pISSN)
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  • 2233-4998(eISSN)
Korean Carbon Society (한국탄소학회)
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Removal of chromium from tannery wastewater by electrosorption on carbon prepared from peach stones: effect of applied potential

  • Ziati, Mounir (Laboratory of Soft Technologies, Physico-Chemical Valorization of Biological Materials and Biodiversity, Department of Chemistry, Faculty of Sciences, M'hamed Bougara University) ;
  • Khemmari, Fariza (Food Technology Laboratory, Department of Environmental Engineering, Faculty of Engineering Sciences, M'hamed Bougara University) ;
  • Kecir, Mohamed (Mineral and Energy Resources Laboratory, Department of Mining and Oil Deposits, Faculty of Hydrocarbons and Chemistry, M'hamed Bougara University) ;
  • Hazourli, Sabir (Laboratory of Water Treatment and Valorization of Industrial Waste, Department of Chemistry, Faculty of Sciences, Badji Mokhtar University)
  • Received : 2016.06.20
  • Accepted : 2016.12.19
  • Published : 2017.01.31
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Abstract

The objective of this study is the removal of chromium from tannery wastewater by electrosorption on carbon prepared from lignocellulosic natural residue "peach stones' thermally treated. The followed steps for obtaining coal in chronological order were: cleaning, drying, crushing and finally its carbonization at $900^{\circ}C$. The characterization of the carbon material resulted in properties comparable to those of many coals industrially manufactured. The study of the dynamic adsorption of chromium on the obtained material resulted in a low removal rate (33.7%) without applied potential. The application of negative potentials of -0.7 V and -1.4 increases the adsorption of chromium up to 90% and 96% respectively. Whereas a positive potential of +1.4V allows desorption of the contaminant of 138%.

Keywords

References

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