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<p>Glyphosate is one of the most widely used herbicides globally, raising numerous concerns regarding its impact on human health and the environment. This study investigates the application of Diatomite earth decorated with silver or gold nanoparticles for glyphosate adsorption and Surface-enhanced Raman scattering (SERS) detection. The samples were characterized using Fourier- transform infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and fluorescence microscopy. Ultraviolet-visible (UV-vis) spectroscopy was used to quantify glyphosate in water. The maximum glyphosate adsorption capacity was 97% for the diatomite decorated with gold nanoparticles of 10 ± 2&#xa0;nm and 94% for the diatomite decorated with silver nanoparticles of 50 ± 10&#xa0;nm at a pH of 6. Diatomite decorated with silver nanoparticles, yields a 2.50 × 10<sup>4</sup> SERS enhancement factor for glyphosate detection, and the highest fluorescence was obtained with the diatomite decorated with gold nanoparticles. The novelty of this work lies in the combination of glyphosate remediation and SERS detection within a single material platform, a feature that cannot be achieved with pristine diatomite or conventional adsorbents.</p>

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Diatomite with silver and gold nanoparticles for glyphosate removal and SERS detection

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • Daheny Lopez,
  • Sarah Briceño,
  • Melany Aguilar,
  • Alexis Debut,
  • Gema Gonzalez

摘要

Glyphosate is one of the most widely used herbicides globally, raising numerous concerns regarding its impact on human health and the environment. This study investigates the application of Diatomite earth decorated with silver or gold nanoparticles for glyphosate adsorption and Surface-enhanced Raman scattering (SERS) detection. The samples were characterized using Fourier- transform infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and fluorescence microscopy. Ultraviolet-visible (UV-vis) spectroscopy was used to quantify glyphosate in water. The maximum glyphosate adsorption capacity was 97% for the diatomite decorated with gold nanoparticles of 10 ± 2 nm and 94% for the diatomite decorated with silver nanoparticles of 50 ± 10 nm at a pH of 6. Diatomite decorated with silver nanoparticles, yields a 2.50 × 104 SERS enhancement factor for glyphosate detection, and the highest fluorescence was obtained with the diatomite decorated with gold nanoparticles. The novelty of this work lies in the combination of glyphosate remediation and SERS detection within a single material platform, a feature that cannot be achieved with pristine diatomite or conventional adsorbents.