JOURNAL of the Tunisian Chemical Society

serving the Research, the Education and the Industry

Characterization of activated carbon prepared from a new raw lignocellulosic material: Ziziphus spina-christi seeds

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The objective of this study is the characterization of activated carbon prepared from a lignocellulosic natural residue which is a vegetation waste "seeds of Ziziphus spina-christi" of the central of Tunisia. The activated carbon was prepared by these conditions as follows: 3/4/1 (w/w) a water/KOH/coal ratio, 700°C carbonization temperature and 120 min activation time. Characterization of the activated carbon obtained was performed by using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and specific surface. The adsorption properties of samples of carbons were studied from their adsorption isotherm of copper from aqueous solutions at 25°C. This study has resulted that the adsorption obeys the Langmuir isotherm as well the Freundlich isotherm with maximum adsorption capacity of about 104 mg /g.

A. Omri, M. Benzina

Ziziphus spina-christi seeds; activated carbon; Characterization; Adsorption

Pages: 175-183

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