Adsorption of Salicylic and Sulfosalicylic Acid onto Powdered Activated Carbon prepared from Rice and Coffee Husks

Authors

  • TCHUIFON TCHUIFON Donald Raoul Laboratory of Noxious Chemistry and Environmental Engineering, Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon Author
  • ANAGHO Solomon Gabche Laboratory of Noxious Chemistry and Environmental Engineering, Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon , Department of Chemistry, Faculty of Science, University of Bamenda, P.O. Box 39, Bamenda, Cameroon Author
  • NCHE George Ndifor-A Laboratory of Noxious Chemistry and Environmental Engineering, Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon Author
  • KETCHA Joseph Mbadcam Physical and Theoretical Chemistry Laboratory, Faculty of Science, University of Yaounde 1, P.O. Box 812, Yaounde , Cameroon Author

Keywords:

adsorption, activated carbon, phenolic compounds, rice and coffee husks.

Abstract

Activated carbons prepared by chemical activation of rice and coffee husks with phosphoric acid were used to study the adsorption of salicylic and sulfosalicylic acids. The characterization of the prepared activated carbons showed that the pH at zero charge was between 2.3 and 3.45; the bulk density was around 0.800 g/cm3 and the iodine number was between 476 and 590 mg/g. The adsorption process took place in two stages, and the adsorbents had a good affinity for the two acids. The adsorption capacity was found to increase with increasing molar mass of the adsorbates, and the best pH for adsorption of 2 was below the pH of zero charge. The kinetic and equilibrium examination of the process showed the adsorption to be chemical in nature, exothermic and occurred only over a monolayer.

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Published

2015-06-30

Issue

Vol.5, No.3 (May/Jun 2015)

Section

Articles

How to Cite

Adsorption of Salicylic and Sulfosalicylic Acid onto Powdered Activated Carbon prepared from Rice and Coffee Husks. (2015). International Journal of Current Engineering and Technology, 5(3), 1641-1652. https://ijcet.evegenis.org/index.php/ijcet/article/view/2177