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

Autor: Romão ALE; Environmental Nanobiotechnology Laboratory, State University of Ceará, 1700, Fortaleza, Ceará, 60714-903, Brazil., de Oliveira Damasceno RI; Department of Science and Technology, State University of Ceará, 1700, Fortaleza, Ceará, 60714-903, Brazil., Alves CR; Environmental Nanobiotechnology Laboratory, State University of Ceará, 1700, Fortaleza, Ceará, 60714-903, Brazil., Carrilho ENVM; Department of Natural Sciences, Mathematics, and Education, Federal University of São Carlos, Araras, São Paulo, 13600-970, Brazil. elma.carrilho@gmail.com.; Laboratory of Polymeric Materials and Biosorbents, Federal University of São Carlos, Araras, São Paulo, 13600-970, Brazil. elma.carrilho@gmail.com.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2024 Oct 12. Date of Electronic Publication: 2024 Oct 12.
DOI: 10.1007/s11356-024-35193-7
Abstrakt: 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 (pH PZC ) 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 (Q exp ) 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 Q exp 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 r 2  = 0.99868 (MB) and r 2  = 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.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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