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Magnetic nanocomposite synthesized from cocopeat for highly efficient mercury removal from aqueous solutions

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Abstract

The utilization of renewable and cost-effective biomass for the production of activated carbon represents an innovative approach to environmental remediation. In this work, environmentally friendly carbon materials derived from cocopeat were employed to create a cocopeat-based magnetic activated carbon (CPAC-Fe3O4) nanocomposite for the removal of mercury from aqueous solutions. The CPAC-Fe3O4 nanocomposite underwent comprehensive characterization using SEM, FTIR, BET, XRD, and VSM analyses. The optimization process revealed a maximum adsorption capacity of 204.08 mg/g under specific conditions: initial Hg concentration of 20 mg/L, pH of 6, temperature of 25 °C, and adsorbent dose of 0.01 g within 60 min. Isotherm and kinetic modeling exhibited strong agreement with the Freundlich isotherm (0.9749) and pseudo-second-order (0.9997) kinetic models, indicating a favorable chemisorption process. Furthermore, thermodynamic analysis suggested that the adsorption process is endothermic and spontaneous. The adsorption mechanism was elucidated based on FTIR analysis. The results highlight the CPAC-Fe3O4 nanocomposite as a promising and sustainable candidate for effective water purification.

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Funding

This work was supported by Gorgan University of Agricultural Sciences and Natural Resources, Iran [grant number 01–474-96].

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  1. Department of Environmental Sciences, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

    Hassan Rezaei, Negar Movazzaf Rostami & Hajar Abyar

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  1. Hassan Rezaei
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Contributions

Hassan Rezaei: conceptualization, investigation, methodology, and supervision; Negar Movazzaf Rostami: investigation, methodology, original draft; Hajar Abyar: data analysis, original draft, and draft review and editing.

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Correspondence to Hassan Rezaei.

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Rezaei, H., Rostami, N.M. & Abyar, H. Magnetic nanocomposite synthesized from cocopeat for highly efficient mercury removal from aqueous solutions. Biomass Conv. Bioref. (2024). https://doi.org/10.1007/s13399-024-05425-4

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