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Nanomodified bamboo (Phyllostachys aurea) biomass: its adsorbent features in the removal of dyes from water under high salinity conditions

  • Advancements in Materials and Devices for Environmental Pollution Detection
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Abstract

The effluent generated by textile industries is among the most polluting to the environment. Dyes such as methylene blue (MB) and indigo blue (IB) are used in cotton dyeing. This work proposes to evaluate the potential of in natura (BIN) and nanomodified (BNP) bamboo (Phyllostachys aurea) biomass as biosorbents for the removal of MB and IB dyes in an aqueous medium under high salinity conditions. These materials were characterized by Fourier transform infrared (FTIR) and X-ray (XRD) spectroscopies and scanning electron microscopy (SEM) to investigate their morphology and interaction with the dyes and the nanoparticles. The FTIR spectra revealed the existence of hydroxyl and carbonyl groups, ethers, phenols, and aromatic compounds, indicating the presence of a lignocellulosic structure. XRD and SEM analyses confirmed the effectiveness of the nanocomposite synthesis process. The dyes were quantified by ultraviolet–visible spectroscopy (UV/Vis). The material’s pH at the point of zero charge (pHPZC) was 5.52 (BIN) and 4.84 (BNP), and the best IB and MB sorption pH were 3.0 and 9.0 for BNP, respectively, employing 30 min of contact time. The material sorption capacity (Qexp) was assessed using batch procedures, in which 100–1000 mg/L dye concentrations were tested with a 0.5 g/L adsorbent dose. The dye’s Qexp for BIN and BNP was 25.41 ± 0.58 and 23.42 ± 0.07 mg/g (MB) and 84.26 ± 1.1 and 130.81 ± 0.20 mg/g (IB), respectively. The kinetic model that best fit BNP experimental data was the pseudo-2nd-order with r2 = 0.99868 (MB) and r2 = 0.99873 (IB), and Freundlich, D-R, and Temkin isotherms best fit the dye sorption data. The bamboo nanomodification facilitates the biosorbent removal from the medium after sorption, enabling large-scale studies and industrial applications—the investigated materials provided promising adsorption features for removing contaminant dyes in saline water.

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All data generated or analyzed during this study are included in this published article. Extra data are available from the authors ([email protected]) upon reasonable request.

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Funding

We acknowledge Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES, Grant# AP3-009600040103/14) and Conselho Nacional de Desenvolvimento Científco e Tecnológico (CNPq) for the scholarship provided. We are grateful to Laboratório de Microscopia e Caracterização de Materiais (LabMiCaM) from Centro de Ciências Agrárias, Universidade Federal de São Carlos, for providing the SEM analysis.

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Ana L. E. Romão, Elma NVM Carrilho, and Carlucio R. Alves postulated and supervised the work. Ana L. E. Romão and Elma NVM Carrilho planned the experiment. Ana L. E. Romão and Roberta I. O. Damasceno obtained the experimental data. Ana L. E. Romão and Elma NVM Carrilho carried out the data analysis. Ana L. E. Romão adjusted the experimental data to the isothermal models applied. Ana L. E. Romão and Elma NVM Carrilho prepared the first draft, and Elma NVM Carrilho thoroughly revised the manuscript. All authors read and approved the final manuscript version.

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Correspondence to Elma Neide Vasconcelos Martins Carrilho.

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Romão, A.L.E., de Oliveira Damasceno, R.I., Alves, C.R. et al. Nanomodified bamboo (Phyllostachys aurea) biomass: its adsorbent features in the removal of dyes from water under high salinity conditions. Environ Sci Pollut Res 32, 22004–22020 (2025). https://doi.org/10.1007/s11356-024-35193-7

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  • DOI: https://doi.org/10.1007/s11356-024-35193-7

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