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Comparative Study of Pretreatments on Coconut Fiber for Efficient Isolation of Lignocellulosic Fractions

Author

Listed:
  • Fabrícia Vieira

    (Northeastern Biotechnology Network, Federal University of Sergipe, São Cristóvão 49100-000, SE, Brazil)

  • Hortência E. P. Santana

    (Northeastern Biotechnology Network, Federal University of Sergipe, São Cristóvão 49100-000, SE, Brazil
    Graduate Program in Biotechnology, Federal University of Sergipe, São Cristóvão 49100-000, SE, Brazil)

  • Meirielly Jesus

    (CISAS—Center for Research and Development in Agrifood Systems and Sustainability, Instituto Politécnico de Viana do Castelo, 4900-347 Viana do Castelo, Portugal)

  • Fernando Mata

    (CISAS—Center for Research and Development in Agrifood Systems and Sustainability, Instituto Politécnico de Viana do Castelo, 4900-347 Viana do Castelo, Portugal)

  • Preciosa Pires

    (CISAS—Center for Research and Development in Agrifood Systems and Sustainability, Instituto Politécnico de Viana do Castelo, 4900-347 Viana do Castelo, Portugal
    ESTG—Escola Superior de Tecnologia e Gestão, Instituto Politécnico de Viana do Castelo, Av. do Atlântico, 4900-348 Viana do Castelo, Portugal)

  • Manuela Vaz-Velho

    (CISAS—Center for Research and Development in Agrifood Systems and Sustainability, Instituto Politécnico de Viana do Castelo, 4900-347 Viana do Castelo, Portugal
    ESTG—Escola Superior de Tecnologia e Gestão, Instituto Politécnico de Viana do Castelo, Av. do Atlântico, 4900-348 Viana do Castelo, Portugal)

  • Daniel Pereira Silva

    (Northeastern Biotechnology Network, Federal University of Sergipe, São Cristóvão 49100-000, SE, Brazil
    Graduate Program in Biotechnology, Federal University of Sergipe, São Cristóvão 49100-000, SE, Brazil
    CISAS—Center for Research and Development in Agrifood Systems and Sustainability, Instituto Politécnico de Viana do Castelo, 4900-347 Viana do Castelo, Portugal
    Center for Exact Sciences and Technology, Federal University of Sergipe, São Cristóvão 49100-000, SE, Brazil)

  • Denise Santos Ruzene

    (Northeastern Biotechnology Network, Federal University of Sergipe, São Cristóvão 49100-000, SE, Brazil
    Graduate Program in Biotechnology, Federal University of Sergipe, São Cristóvão 49100-000, SE, Brazil
    CISAS—Center for Research and Development in Agrifood Systems and Sustainability, Instituto Politécnico de Viana do Castelo, 4900-347 Viana do Castelo, Portugal
    Center for Exact Sciences and Technology, Federal University of Sergipe, São Cristóvão 49100-000, SE, Brazil)

Abstract

Pretreatment is an essential step for breaking the recalcitrant structure of lignocellulosic biomass and allowing conversion to high-value-added chemicals. In this study, coconut fiber was subjected to three pretreatment methods to compare their impacts on the biomass’s structural characteristics and their efficiency in fractionating the biomass. This comparative approach was conducted to identify mild biomass pretreatment conditions that efficiently extract lignin and recover cellulose-rich pulp for the production of bioproducts. To this end, autohydrolysis, alkaline, and organosolv pretreatments were performed under different experimental conditions, and the physicochemical properties of the samples were evaluated using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and chemical characterization of the cellulose, hemicellulose, and lignin fractions. Therefore, efficient experimental conditions were identified to pretreat coconut fibers with an extended understanding of the methods to process lignocellulose. Great delignification efficiency and pulp yield were obtained with organosolv > alkaline extraction > autohydrolysis under the selected conditions of 2 h at 185 °C in the presence of a catalyst, namely, 0.5 M NaOH, for 2 h at 55 °C and 20 min at 195 °C, respectively. FT-IR revealed a predominance of hydroxyl groups in fibers obtained from alkaline and organosolv pretreatment, showing higher lignin degradation and cellulose concentration in these samples. TGA revealed mass loss curves with similar behaviors but different patterns and intensities, and MVE analysis showed differences on the surfaces of each sample. The comparison of experimental parameters allowed the identification of suitable conditions for each extraction method, and structural analyses identified the specific characteristics of the fibers that could be obtained according to the method used. Therefore, the results are of great importance for developing sustainable and effective industrial processes.

Suggested Citation

  • Fabrícia Vieira & Hortência E. P. Santana & Meirielly Jesus & Fernando Mata & Preciosa Pires & Manuela Vaz-Velho & Daniel Pereira Silva & Denise Santos Ruzene, 2024. "Comparative Study of Pretreatments on Coconut Fiber for Efficient Isolation of Lignocellulosic Fractions," Sustainability, MDPI, vol. 16(11), pages 1-21, June.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:11:p:4784-:d:1408553
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    References listed on IDEAS

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    1. Meirielly Jesus & Fernando Mata & Rejane A. Batista & Denise S. Ruzene & Ricardo Albuquerque-Júnior & Juliana C. Cardoso & Manuela Vaz-Velho & Preciosa Pires & Francine F. Padilha & Daniel P. Silva, 2023. "Corncob as Carbon Source in the Production of Xanthan Gum in Different Strains Xanthomonas sp," Sustainability, MDPI, vol. 15(3), pages 1-13, January.
    2. Gonçalves, Fabiano Avelino & Ruiz, Héctor A. & Silvino dos Santos, Everaldo & Teixeira, José A. & de Macedo, Gorete Ribeiro, 2016. "Bioethanol production by Saccharomyces cerevisiae, Pichia stipitis and Zymomonas mobilis from delignified coconut fibre mature and lignin extraction according to biorefinery concept," Renewable Energy, Elsevier, vol. 94(C), pages 353-365.
    3. Brenda Lohanny Passos Santos & Meirielly Santos Jesus & Fernando Mata & Aline Alves Oliveira Santos Prado & Isabela Maria Monteiro Vieira & Larissa Castor Ramos & Jorge A. López & Manuela Vaz-Velho & , 2023. "Use of Agro-Industrial Waste for Biosurfactant Production: A Comparative Study of Hemicellulosic Liquors from Corncobs and Sunflower Stalks," Sustainability, MDPI, vol. 15(8), pages 1-11, April.
    4. Ebrahimi, Majid & Caparanga, Alvin R. & Ordono, Emma E. & Villaflores, Oliver B., 2017. "Evaluation of organosolv pretreatment on the enzymatic digestibility of coconut coir fibers and bioethanol production via simultaneous saccharification and fermentation," Renewable Energy, Elsevier, vol. 109(C), pages 41-48.
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