Scholarlink

<p>This study reports the green synthesis of novel iron oxide nanoparticles (α-Fe2O3NPs) with high dye removal efficiency using cactus cladode extract as a reducing agent. The synthesized α-Fe2O3NPs were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), and X-ray fluorescence (XRF) analyses to confirm their structure and properties. The influence of various parameters, including solution pH, initial methylene blue (MB) concentration, adsorbent dose, and salt content, on the adsorption process was investigated. The equilibrium adsorption data closely followed the Langmuir isotherm model with a high correlation coefficient (<i>R</i><sup>2</sup> = 0.991). The maximum adsorption capacity of MB dye reached an impressive 1666&#xa0;mg.g⁻<sup>1</sup>. Kinetic studies revealed that the adsorption process was well-described by the pseudo-second-order kinetic model (<i>R</i><sup>2</sup> = 0.980). Thermodynamic analysis indicated that the dye adsorption process was exothermic and spontaneous in nature. Optimization of the MB adsorption process was carried out using response surface methodology (RSM) with the application of Box–Behnken design (BBD). Under the optimal conditions of an adsorbent dose of 10&#xa0;mg, solution pH of 10.92, initial MB concentration of 131.92&#xa0;mg.L⁻<sup>1</sup>, and salt concentration of 0.02&#xa0;g.L⁻<sup>1</sup>, a maximum adsorption capacity of 358.48&#xa0;mg.g⁻<sup>1</sup> was achieved. Finally, the nanoparticles maintained high efficiency over three successive cycles of MB dye removal, demonstrating their potential as a sustainable and effective adsorbent for wastewater treatment applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Green iron oxide nanoparticles from Opuntia ficus-indica (L.) extract for efficient dye removal: optimization and mechanism investigation

  • 期刊论文

  • 发表日期：

    2025年2月26日

查看全文
  • Asma Abdedayem,
  • Hajer Chemingui,
  • Hanen Nouri,
  • Amor Hafiane,
  • Taissire Ben Amor

摘要

This study reports the green synthesis of novel iron oxide nanoparticles (α-Fe2O3NPs) with high dye removal efficiency using cactus cladode extract as a reducing agent. The synthesized α-Fe2O3NPs were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), and X-ray fluorescence (XRF) analyses to confirm their structure and properties. The influence of various parameters, including solution pH, initial methylene blue (MB) concentration, adsorbent dose, and salt content, on the adsorption process was investigated. The equilibrium adsorption data closely followed the Langmuir isotherm model with a high correlation coefficient (R2 = 0.991). The maximum adsorption capacity of MB dye reached an impressive 1666 mg.g⁻1. Kinetic studies revealed that the adsorption process was well-described by the pseudo-second-order kinetic model (R2 = 0.980). Thermodynamic analysis indicated that the dye adsorption process was exothermic and spontaneous in nature. Optimization of the MB adsorption process was carried out using response surface methodology (RSM) with the application of Box–Behnken design (BBD). Under the optimal conditions of an adsorbent dose of 10 mg, solution pH of 10.92, initial MB concentration of 131.92 mg.L⁻1, and salt concentration of 0.02 g.L⁻1, a maximum adsorption capacity of 358.48 mg.g⁻1 was achieved. Finally, the nanoparticles maintained high efficiency over three successive cycles of MB dye removal, demonstrating their potential as a sustainable and effective adsorbent for wastewater treatment applications.