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<p>Biomass material has attracted more attention for its environmental friendliness, low cost and high performance. Here, the iron nanoparticles/luffa fiber was synthesized via tea extracts and its efficiency on dyes removal was investigated. The composite was characterized by XRD, FTIR, SEM, XPS, BET and UV–Vis. Fe nanoparticles showed regular spherical or ellipsoidal with an average diameter from 75 to 100&#xa0;nm, which evenly anchored on the luffa fiber carrier. Batch experiments were carried out under different reaction parameters including pH, initial pollutant concentration, reaction time and temperature. Meanwhile, the composite exhibited outstanding selective adsorption towards cationic dyes especially Malachite Green in the coexisting dyes. The kinetics of the iron nanoparticles/luffa on Malachite Green fitted better with the pseudo-first order kinetic model. The thermodynamic was endothermic, and the removal reaction revealed a chemical diffusion controllable process. The removal efficiency for Malachite Green reached 92.34% (298&#xa0;K, pH = 10, 360&#xa0;min.), and possible mechanism was adsorption and reduction. Notably, it remained at 75.3% after three cycles. In addition, the phytotoxicity assessment was investigated and the results indicated that the composite had no obvious biotoxicity. With green synthesis, recyclable and high selective adsorption performance, the iron nanoparticles/luffa is expected to be a potential alternative to wastewater treatment and environmental remediation.</p>

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Efficient-Selective Removal of Cationic Dyes via Recyclable Iron Nanoparticles/Luffa: Performance, Phytotoxicity Assessment and Mechanism Insight

  • 期刊论文

  • 发表日期：

    2025年1月28日

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  • Yan Zhao,
  • Rao Li,
  • Changyuan Xiao,
  • Haiyan Li,
  • Siqi Bao

摘要

Biomass material has attracted more attention for its environmental friendliness, low cost and high performance. Here, the iron nanoparticles/luffa fiber was synthesized via tea extracts and its efficiency on dyes removal was investigated. The composite was characterized by XRD, FTIR, SEM, XPS, BET and UV–Vis. Fe nanoparticles showed regular spherical or ellipsoidal with an average diameter from 75 to 100 nm, which evenly anchored on the luffa fiber carrier. Batch experiments were carried out under different reaction parameters including pH, initial pollutant concentration, reaction time and temperature. Meanwhile, the composite exhibited outstanding selective adsorption towards cationic dyes especially Malachite Green in the coexisting dyes. The kinetics of the iron nanoparticles/luffa on Malachite Green fitted better with the pseudo-first order kinetic model. The thermodynamic was endothermic, and the removal reaction revealed a chemical diffusion controllable process. The removal efficiency for Malachite Green reached 92.34% (298 K, pH = 10, 360 min.), and possible mechanism was adsorption and reduction. Notably, it remained at 75.3% after three cycles. In addition, the phytotoxicity assessment was investigated and the results indicated that the composite had no obvious biotoxicity. With green synthesis, recyclable and high selective adsorption performance, the iron nanoparticles/luffa is expected to be a potential alternative to wastewater treatment and environmental remediation.