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Advances in Environmental Research
  Volume 1, Number 2, June 2012, pages 143-151
open access

Equilibrium modeling for adsorption of NO3¯ from aqueous solution on activated carbon produced from pomegranate peel
I. Rouabeh and M. Amrani

    Nitrate removal from aqueous solution was investigated using ZnCl2 and phosphoric acid activated carbon developed from pomegranate peel with particle size 0.4 mm. Potassium nitrate solution was used in batch adsorption experiments for nitrate removal from water. The effects of activated carbon dosage, time of contact, and pH were studied. The equilibrium time was fond to be 45 min. Two theoretical adsorption isotherms namely Langmuir and Freundlich were used to describe the experimental results. The Langmuir fit the isotherm with the theoretical adsorption capacity (qt) was fond 78.125 mg g-1. Adsorption kinetics data were modeled using the pseudo-first, pseudo-second order, and intraparticle diffusion models. The results indicate that the second-order model best describes adsorption kinetic data. Results show activated carbon produced from pomegranate is effective for removal of nitrate from aqueous solution.
Key Words
    adsorption; kinetics; equilibrium; isotherm; activated carbon; pomegranate peel
I. Rouabeh and M. Amrani: Laboratory of Soft Technology, Recovering, and Sustainable Development Faculty of Science, M\'Hamed Bougara University, Boumerdes, Algeria

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