Entangled cellulose nanofibrils/nanosheets derived from native mexican agave for lead(II) ion removal

Elizabeth Hernández-Francisco, José Bonilla-Cruz, Uriel Márquez-Lamas, Ángela Suárez-Jacobo, Francisco Longoria-Rodríguez, Julio Rivera-Haro, Paul Russell, Zulfiqur Ali, Chun-Yang Yin, Tania E. Lara-Ceniceros

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Abstract

Cellulose nanofibrils (CNFs) produced from waste lignocellulosic biomass have emerged as a sustainable source material for high value-added applications. In the current study, previously unreported entangled cellulose nanofibril and nanosheet (CNF/CNS) were obtained using Agave Tequilana Weber var. Azul leaves by means of a microfluidization process. These nanomaterials were investigated as potential biosorbents of Pb2?, for which three adsorption mechanisms were identified by XPS. At low initial concentrations of Pb2? (C0 \ 100 ppm), the adsorption-mechanism is governed by electrostatic interactions between carboxylate groups and Pb2?; meanwhile, at (C0 = 1000 ppm) mono and bi-dentate complexes dominate the adsorption-mechanism. Finally, when 110 \ C0 \ 1000 ppm, both mechanisms co-exist. The maximum adsorption capacity was 43.55 mg/g, according to the Langmuir model, while CNF/CNS showed the characteristic diffraction peaks of cellulose type II. Our results highlight the high potential of these novel CNF/CNS biosorbents in the treatment of wastewater contaminated with toxic metals and afford new insights on adsorption mechanisms.
Original languageEnglish
Number of pages14
JournalCellulose
Early online date10 Aug 2020
DOIs
Publication statusE-pub ahead of print - 10 Aug 2020

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    Hernández-Francisco, E., Bonilla-Cruz, J., Márquez-Lamas, U., Suárez-Jacobo, Á., Longoria-Rodríguez, F., Rivera-Haro, J., Russell, P., Ali, Z., Yin, C-Y., & Lara-Ceniceros, T. E. (2020). Entangled cellulose nanofibrils/nanosheets derived from native mexican agave for lead(II) ion removal. Cellulose. https://doi.org/10.1007/s10570-020-03373-6