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Biosorption of heavy metals on Opuntia fuliginosa and Agave angustifolia fibers for their elimination from water

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Abstract

In this work, Opuntia fuliginosa and Agave angustifolia fibers were used as an alternative for the removal of heavy metals from water, through a biosorption process. Both species of plant are widely available in Mexico, particularly A. angustifolia as waste material from the production of tequila. First, both fibers were characterized by scanning electron microscopy/energy-dispersive spectroscopy, Fourier transform infrared spectroscopy, and elemental analysis. The scanning electron microscopy analysis showed structural differences between both fibers; the main chemical elements are carbon and oxygen, in addition to other elements, which allows the existence of functional groups such as hydroxyl, carboxyl, and carbonyl, among others. Subsequently, to test the fibers capacity for the removal of heavy metals from water, batch adsorption experiments were carried out with different particle sizes. O. fuliginosa fibers, with a particle size of 0.572 mm, removed 93% of Pb, followed by Cr, Fe, Cu, Zn, Cd, and Mn. However, for other particle sizes, it was possible to remove up to 90% of the Pb, followed by Cd, Cr, and Zn. In general, lead was adsorbed in a larger proportion compared to all metals studied, regardless of fiber size. In the same way, A. angustifolia fiber efficiently adsorbs Pb, regardless of the particle size, since it also removes up to 90%. According to the Langmuir and Freundlich adsorption isotherms analysis, O. fuliginosa adsorbs heavy metals in the form of multilayer, while A. angustifolia absorbs them through both mechanisms, as monolayer and multilayer.

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Acknowledgments

The authors wish to thank Alicia Ronda Galvez for her support in reviewing the results of the isotherms of Langmuir and Freundlich. Also, this work was supported by the National Council for Science and Technology (CONACyT by its acronym in Spanish) with a PhD scholarship awarded to Flores-Trujillo AKI (Grant: 592589).

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Correspondence to P. Mussali-Galante or L. Ortiz-Hernández.

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There is no conflict of interest of any kind between the author and co-authors.

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Editorial responsibility: Jing Chen.

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Flores-Trujillo, A.K.I., Mussali-Galante, P., de Hoces, M.C. et al. Biosorption of heavy metals on Opuntia fuliginosa and Agave angustifolia fibers for their elimination from water. Int. J. Environ. Sci. Technol. 18, 441–454 (2021). https://doi.org/10.1007/s13762-020-02832-8

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  • DOI: https://doi.org/10.1007/s13762-020-02832-8

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