Effect of Silica Content in a Bio-Polymeric Blended Nanocomposite for Efficient Adsorption of Mercury in Basic Aqueous Solution 


Vol. 26,  No. 2, pp. 521-535, Feb.  2025
10.1007/s12221-025-00854-y


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  Abstract

The current work describes the development of silica chitosan-guar gum blended nanocomposites (NCs) for the proficient removal of mercury (Hg2+) ions in aqueous solution at pH 12. The silica NCs were prepared by dispersing the as-synthesized silica nanoparticles (NPs) into the chitosan-guar gum (CS-GG) polymer blend matrix. The developed silica NCs were characterized by FTIR, SEM–EDS, XRD, TGA, and BET. The results confirmed the dispersion of silica NPs on the surface of the CS: GG blend resulting in silica NCs with improved thermal stability, and an enhanced specific pore surface area from 11.843 m2/g to 23.029 m2/g. The 2 and 5% silica NCs were used as an efficient adsorbent for the removal of mercury ions. The 2 and 5% of silica NCs showed a maximum removal efficiency of 88% and 79% for mercury ions, respectively. The adsorption process is best fitted with the Langmuir adsorption isotherm and pseudo-second-order kinetic model. The adsorbent proved to be economical with 72% of removal efficiency after five cycles using EDTA as a desorbing solution.

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  Cite this article

[IEEE Style]

A. Tshikovhi, S. B. Mishra, A. K. Mishra, T. E. Motaung, "Effect of Silica Content in a Bio-Polymeric Blended Nanocomposite for Efficient Adsorption of Mercury in Basic Aqueous Solution," Fibers and Polymers, vol. 26, no. 2, pp. 521-535, 2025. DOI: 10.1007/s12221-025-00854-y.

[ACM Style]

A. Tshikovhi, Shivani B. Mishra, Ajay K. Mishra, and Tshwafo E. Motaung. 2025. Effect of Silica Content in a Bio-Polymeric Blended Nanocomposite for Efficient Adsorption of Mercury in Basic Aqueous Solution. Fibers and Polymers, 26, 2, (2025), 521-535. DOI: 10.1007/s12221-025-00854-y.

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pISSN : 1229 - 9197
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