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Issue 47, 2013
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Adsorption of Ponceau 4R from aqueous solutions using alkali boiled Tilapia fish scales

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Abstract

Tilapia fish scale, which facilitates both surface adsorption by hydroxyapatite and electrostatic interaction by collagen after boiling in alkaline environment, was used to prepare an adsorbent for the removal of the hazardous azo dye, Ponceau 4R. The prepared adsorbent was characterized by SEM, FT-IR and physical adsorption studies. Adsorption of Ponceau 4R by the prepared adsorbent was achieved under different initial Ponceau 4R concentrations, fish scale adsorbent doses, temperatures and pH conditions. The Freundlich isotherm model represented the experimental data very well. Kinetic studies indicated that the adsorption process followed the pseudo-second-order model and the theoretical maximum adsorption capacity of the fish scale adsorbent was 134.40 mg g−1. The adsorption thermodynamics study indicated that the adsorption process was a spontaneous and exothermic process.

Graphical abstract: Adsorption of Ponceau 4R from aqueous solutions using alkali boiled Tilapia fish scales

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Publication details

The article was received on 22 Jul 2013, accepted on 12 Sep 2013 and first published on 16 Sep 2013


Article type: Paper
DOI: 10.1039/C3RA43817A
Citation: RSC Adv., 2013,3, 25221-25230
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    Adsorption of Ponceau 4R from aqueous solutions using alkali boiled Tilapia fish scales

    K. Zhu, X. Gong, D. He, B. Li, D. Ji, P. Li, Z. Peng and Y. Luo, RSC Adv., 2013, 3, 25221
    DOI: 10.1039/C3RA43817A

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