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Adsorption of Citric Acid from Aqueous Solution onto Activated

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Author Affiliations

  • 1 Agricultural research center, Giza, EGYPT
  • 2 Agricultural research center, Giza, EGYPT

Int. Res. J. Environment Sci., Volume 1, Issue (4), Pages 7-13, November,22 (2012)

Abstract

The removal of citric acid, an organic ligand, from aqueous solution by adsorption onto activated Pistacia Lentiscus leaves’ powder was investigated. Batch adsorption studies were performed to evaluate the effect of various operating parameters affecting the adsorption process such as pH, contact time, initial citric acid concentration and adsorbent dose. The optimum contact time for the equilibrium condition was 75 min. at the sorbent dose rate of 2.5g/L, while the best removal of CA was at pH 6. Isothermal and kinetic models were also carried out. The experimental kinetic adsorption data were in close agreement with second order rate kinetics expression. The obtained data were found to follow the three investigated isothermal models in the following order: Freundlich

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