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<p>This study presents a new environmentally friendly approach to synthesizing highly ordered mesoporous silica (MCM-41) using nettle leaves (Urtica dioica), an abundant but undervalued plant biomass that grows rapidly, requires no fertilizers or pesticides, and can be harvested several times a year. These characteristics make it a renewable and low-cost resource, offering an alternative to conventional silica source The proposed green synthesis involves alkaline extraction of silica, yielding a high-purity amorphous silica powder (confirmed by X-Ray diffraction and X-Ray Fluorescence), which is then used to synthesize MCM-41. Comprehensive characterization reveals that the resulting material (Bio-MCM-41) possesses a well-defined hexagonal mesostructure (X-Ray Diffraction, Transmission Electron Microscopy), a high specific surface area of 856&#xa0;m² g<sup>-1</sup>, a (Brunauer–Emmett–Teller analysis).&#xa0;The adsorption performance of Bio-MCM-41 was evaluated for the removal of the endocrine-disrupting pharmaceutical 17α-ethinylestradiol (EE2) from aqueous solutions. The material demonstrated a high adsorption capacity of 16.3 mg g<sup>-1</sup>, achieving 92% removal within 45&#xa0;min under neutral pH conditions. Adsorption isotherm data were best described by the Freundlich model, indicating a heterogeneous, multilayer adsorption mechanism. A comparison of the properties of Bio-MCM-41 with commercial MCM-41 and other bio-based variants demonstrated its advantages and performance. The results obtained underscore that Bio-MCM-41, derived from a renewable resource, is not only a cost-effective and environmentally benign adsorbent but also exhibits performance comparable to conventionally synthesized MCM-41. This work highlights the significant potential of biomass valorization in creating advanced porous materials for water remediation.</p>

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Bio-sourced mesoporous silica (MCM-41) derived from nettle leaves for efficient adsorption of 17α-ethinylestradiol (EE2): A sustainable approach to pharmaceutical pollutant removal

  • 期刊论文

  • 发表日期：

    2025年11月25日

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  • Nabil Ait Ben Hammou,
  • Naima Bouchenafa-Saib,
  • Redouane Chebout,
  • Souad Boumad,
  • Imane Moulefera

摘要

This study presents a new environmentally friendly approach to synthesizing highly ordered mesoporous silica (MCM-41) using nettle leaves (Urtica dioica), an abundant but undervalued plant biomass that grows rapidly, requires no fertilizers or pesticides, and can be harvested several times a year. These characteristics make it a renewable and low-cost resource, offering an alternative to conventional silica source The proposed green synthesis involves alkaline extraction of silica, yielding a high-purity amorphous silica powder (confirmed by X-Ray diffraction and X-Ray Fluorescence), which is then used to synthesize MCM-41. Comprehensive characterization reveals that the resulting material (Bio-MCM-41) possesses a well-defined hexagonal mesostructure (X-Ray Diffraction, Transmission Electron Microscopy), a high specific surface area of 856 m² g-1, a (Brunauer–Emmett–Teller analysis). The adsorption performance of Bio-MCM-41 was evaluated for the removal of the endocrine-disrupting pharmaceutical 17α-ethinylestradiol (EE2) from aqueous solutions. The material demonstrated a high adsorption capacity of 16.3 mg g-1, achieving 92% removal within 45 min under neutral pH conditions. Adsorption isotherm data were best described by the Freundlich model, indicating a heterogeneous, multilayer adsorption mechanism. A comparison of the properties of Bio-MCM-41 with commercial MCM-41 and other bio-based variants demonstrated its advantages and performance. The results obtained underscore that Bio-MCM-41, derived from a renewable resource, is not only a cost-effective and environmentally benign adsorbent but also exhibits performance comparable to conventionally synthesized MCM-41. This work highlights the significant potential of biomass valorization in creating advanced porous materials for water remediation.