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Adsorption of Malachite Green Cationic Dye from Aqueous Media by Activated Carbon Modified by Nanosilver

  • PHYSICAL CHEMISTRY OF NANOCLUSTERS AND NANOMATERIALS
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Abstract

Silver nanoparticles (AgNPLs) impregnated onto activated carbon (AC) as an effective solid phase extractor was used in the adsorption of malachite green dye (MG+) from aqueous medium. In alkaline medium at pH 8.0, the removal of MG+ was found to be more favorable than in acid medium. The data are in agreement with the Langmuir model and pseudo-second-order kinetics. Adsorption capacity (qm) calculated from Langmuir equation is 37.17 mg/g. Thermodynamic activation parameters suggest the endothermic and spontaneous process. The adsorption mechanism was examined by the liquid-film and intra-particle diffusion types. The solid phase adsorbent was excellently recycled for seven consecutive sorption–desorption cycles.

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ACKNOWLEDGMENTS

This work was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, under grant no. 130-562-D1435. The authors, therefore, acknowledge with thanks DSR for technical and financial support.

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  1. Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, 21413, Jeddah, Saudi Arabia

    Hassan A. Ewais

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  1. Hassan A. Ewais
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Correspondence to Hassan A. Ewais.

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Ewais, H.A. Adsorption of Malachite Green Cationic Dye from Aqueous Media by Activated Carbon Modified by Nanosilver. Russ. J. Phys. Chem. 96 (Suppl 1), S113–S121 (2022). https://doi.org/10.1134/S0036024422140096

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  • DOI: https://doi.org/10.1134/S0036024422140096

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