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Hybrid nanomaterial from pyrolyzed biomass and Fe3O4 magnetic nanoparticles for the adsorption of textile dyes

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Abstract

Industrial dyes are harmful compounds often present in wastewater. In this work, a magnetic nanohybrid material (HB) was hydrothermally synthesized from pyrolyzed sugarcane straw (CN) and magnetic iron oxide nanoparticles. The material was characterized by XRD, FTIR, SEM, TGA, and PZC, and tested for the adsorptive removal of congo red (CR) and indigo carmine (IC) dyes from aqueous solutions at pH 7.0 and 10.0, respectively. The kinetics of adsorption was well explained by both the pseudo-second order (PSO) model (\(R_{adj}^{2} \sim 0.99\) for CR, 0.96 for IC) and the Elovich model (\(R_{adj}^{2}\) ~ 0.98 for CR, 0.98 for IC). After 24 h, the maximum adsorption capacities of the material were ~ 18.39 mg g−1 for CR and ~ 1.46 mg g−1 for IC. Adsorption isotherms were obtained at 25, 35, and 45 °C, and four different models were tested. The Sips model, which combines Langmuir and Freundlich, was used to fit the data. HB exhibited greater performance removing CR dye (%R ~ 72%) than IC (%R ~ 27%), therefore suggesting great potential as an adsorbent for CR from wastewater.

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Acknowledgments

We gratefully acknowledge the financial support from Brazilian agencies Fundação de Amparo a Ciência e Tecnologia do Estado de Pernambuco (APQ 0692-1.06/15), Conselho Nacional de Desenvolvimento Científico e Tecnológico, and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior. We thank Laboratório de Plasmas e Processos, from Instituto Tecnológico de Aeronáutica, Brazil, for providing the analysis on the thermogravimetric analyzer and X-ray diffractometer equipment.

Funding

This work was supported by Brazilian agencies Fundação de Amparo a Ciência e Tecnologia do Estado de Pernambuco (FACEPE, Grant Number APQ 0692-1.06/15), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).

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All authors contributed to the study conception and design, as well as data analysis. Material preparation and data collection were performed by R.K.doN., B.S.D., A.N.deM, P.H.M.deF., J.V.F.L.C., and A.C.V.dA. The first draft of the manuscript was written by R.K.doN., B.S.D., E.H.L.F., and A.C.V.deA., and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Ana Cláudia Vaz de Araújo.

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do Nascimento, R.K., Damasceno, B.S., de Melo, A.N. et al. Hybrid nanomaterial from pyrolyzed biomass and Fe3O4 magnetic nanoparticles for the adsorption of textile dyes. Cellulose 30, 2483–2501 (2023). https://doi.org/10.1007/s10570-022-04978-9

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  • DOI: https://doi.org/10.1007/s10570-022-04978-9

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