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<p>Biomass adsorption is currently a popular procedure in which the toxicity of pharmaceutical and food products is eliminated or reduced using biowastes. The current work focuses on employing silica nanoparticles to remove those heavy and toxic elements that are bad for human health. Silica nanoparticles (SNPs) are produced using Rice husk ash (RHA) by calcination for 8&#xa0;h (SNPs-8–900) and 4&#xa0;h (SNPs-4–900). The structure and morphology of the as-prepared SNPs were characterized by using Thermogravimetric analysis&#xa0;(TGA), Fourier transform-infrared (FT-IR), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), dynamic light scattering (DLS), transmission electron microscope (TEM), atomic force microscope (AFM), and X-ray diffraction (XRD). The XRD exhibited the most prominent peak at 2θ = 22.38, a characteristic peak for cubic crystalline SNPs. FTIR shows the characteristic bands of the Si–O in the range of 500–1200, indicating the formation of SNPs. The pore size of SNPs-4–900 was 38.002&#xa0;Å and 79.388&#xa0;Å for SNPs-8–900, while the SNPs' 17&#xa0;nm and 20&#xa0;nm sizes were recorded on TEM analysis. The (SNPs-8–900) and (SNPs-4–900) samples were employed to eliminate the heavy metal impurities from losartan potassium drugs. The adsorption capabilities of as-synthesized nanoparticles were determined using SNPs-4–900, which showed Vanadium (78.76%), Cobalt (68.21%), Nickel (82.87%), Cadmium (69.03%), lead (80.34%), Arsenic (84.45%) and Zinc 86.67%, however, SNPs-8–900 exhibited a V (79.07%), Co (71.22%), Ni (83.53%), Cd (71.38%), Pb (81.32%), As (84.45%) and Zn (89.74%) removal percentage. The findings highlight the potential of agro-waste-derived SNPs as a sustainable solution for pharmaceutical purification and environmental remediation.</p> Graphical Abstract <p></p>

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Efficient Green Removal and Quantification of Heavy Metals from Losartan Using Silica Nanoparticles Developed from Rice Husk Ash

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Meet Kumar Thakar,
  • Kamleshkumar Shah,
  • Debasish Shit,
  • Roopashree R,
  • Gajendra Kumar Inwati,
  • Virendra Kumar Yadav,
  • Rajeshkumar Ghemarbhai Chaudhari

摘要

Biomass adsorption is currently a popular procedure in which the toxicity of pharmaceutical and food products is eliminated or reduced using biowastes. The current work focuses on employing silica nanoparticles to remove those heavy and toxic elements that are bad for human health. Silica nanoparticles (SNPs) are produced using Rice husk ash (RHA) by calcination for 8 h (SNPs-8–900) and 4 h (SNPs-4–900). The structure and morphology of the as-prepared SNPs were characterized by using Thermogravimetric analysis (TGA), Fourier transform-infrared (FT-IR), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), dynamic light scattering (DLS), transmission electron microscope (TEM), atomic force microscope (AFM), and X-ray diffraction (XRD). The XRD exhibited the most prominent peak at 2θ = 22.38, a characteristic peak for cubic crystalline SNPs. FTIR shows the characteristic bands of the Si–O in the range of 500–1200, indicating the formation of SNPs. The pore size of SNPs-4–900 was 38.002 Å and 79.388 Å for SNPs-8–900, while the SNPs' 17 nm and 20 nm sizes were recorded on TEM analysis. The (SNPs-8–900) and (SNPs-4–900) samples were employed to eliminate the heavy metal impurities from losartan potassium drugs. The adsorption capabilities of as-synthesized nanoparticles were determined using SNPs-4–900, which showed Vanadium (78.76%), Cobalt (68.21%), Nickel (82.87%), Cadmium (69.03%), lead (80.34%), Arsenic (84.45%) and Zinc 86.67%, however, SNPs-8–900 exhibited a V (79.07%), Co (71.22%), Ni (83.53%), Cd (71.38%), Pb (81.32%), As (84.45%) and Zn (89.74%) removal percentage. The findings highlight the potential of agro-waste-derived SNPs as a sustainable solution for pharmaceutical purification and environmental remediation.

Graphical Abstract