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Kinetic and Equilibrium Studies of Cr(VI) Adsorption Using Glutaraldehyde-Crosslinked Chitosan Beads

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Abstract

The increase of pollution in aquifers by heavy metals in Mexico, because of industrialization and urbanization, have had negative effects for the environment and public health. This work aimed to evaluate the kinetic and equilibrium studies of Cr(VI) adsorption using glutaraldehyde-crosslinked chitosan beads in aqueous systems. Glutaraldehyde-crosslinked chitosan beads were prepared, and three different masses (3, 6, 9 g) were evaluated with 5 concentrations of Cr (VI) (20, 30, 50, 80, 100 mg/L). The adsorption mechanisms were studied through the adsorption isotherms of Langmuir and Freundlich, as well as the adsorption kinetics of pseudo-first order, pseudo-second order, and Elovich based on experimental data. Results showed that after 10 min. of exposure, the beads adsorbed more than 50% of the initial concentration of Cr(VI), and after 90 min. it was possible to remove up to 100% of Cr(VI) contained in the water. The adsorption kinetics of pseudo-second order and Elovich showed the best fits compared to pseudo-first order. Based on these results, glutaraldehyde-crosslinked chitosan beads could be proposed as a good alternative for the removal Cr(VI) from aqueous systems.

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All data generated or analyzed during this study are included in this published article.

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Acknowledgements

The authors acknowledge the financial support from the grants CB 2015-252007-Z provided by the National Council of Science and Technology Mexico (CONACYT) and Cinvestav-LANNBIO for the support provided with the instrumental equipment.

Author Contribution’s

Sandra Torres-Badajoz and Eduardo López Ramírez: formally analyzed and investigated the study, Rodríguez-Núñez J. Rubén: helped in conceptualization, project administration, funding acquisition, roles/writing—original draft, Vicente Peña Caballero: wrote and edited the review and curated the data, Villa-Lerma Alma G.: wrote and edited the review and English language review, Madera-Santana J. Tomás: wrote and edited the review and helped in resources, María Guadalupe Rodríguez Carrillo: formally analyzed the study, and Castillo Omar S: conceptualized and supervised the study.

Funding

This project was supported by National Council of Science and Technology Mexico (CONACYT), CB 2015–252007-Z.

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Correspondence to Jesús R. Rodríguez-Núñez.

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All authors agree that this manuscript is submitted to the “Iranian Journal of Science and Technology, Transactions A: Science.”

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All authors have been personally and actively involved in substantial work leading to the paper and will take public responsibility for its content. Also, this manuscript is not currently being considered for publication elsewhere.

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Torres-Badajoz, S.G., Rodríguez-Núñez, J.R., López-Ramírez, E. et al. Kinetic and Equilibrium Studies of Cr(VI) Adsorption Using Glutaraldehyde-Crosslinked Chitosan Beads. Iran J Sci Technol Trans Sci 46, 147–160 (2022). https://doi.org/10.1007/s40995-021-01255-5

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  • DOI: https://doi.org/10.1007/s40995-021-01255-5

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