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<p>Cadmium ions are highly toxic and pose serious risks to human health and aquatic ecosystems due to their persistence and bioaccumulation. Chronic exposure can cause kidney dysfunction, skeletal damage, and cancer risk, making Cd(II) removal an urgent priority. In this work, two novel nanocomposites; NaAlSi<sub>2</sub>O<sub>6</sub>/Pb<sub>5</sub>Si<sub>3</sub>O<sub>11</sub>/Al<sub>2</sub>SiO<sub>5</sub>/SiO<sub>2</sub> (HS) and its polyethylene glycol 400-modified counterpart (HP), were fabricated via hydrothermal processing for the successful disposal of Cd(II) ions from aqueous environments. X-ray diffraction (XRD) patterns verified the presence of crystalline phases in both samples, with average crystallite sizes of 70.52&#xa0;nm for HS and 61.43&#xa0;nm for HP, indicating the size-reducing effect of polyethylene glycol 400. Energy dispersive X-ray spectroscopy <i>(</i>EDX) analysis revealed a significant increase in carbon content in HP due to the incorporation of polyethylene glycol 400, along with variations in other elemental distributions. Field emission scanning electron microscope (FE-SEM) and high-resolution transmission electron microscope (HR-TEM) analyses demonstrated that HP exhibited a more spherical and uniform morphology compared to the irregular and aggregated structure of HS. The maximum adsorption capacities of HS and HP were 200.00 and 252.53&#xa0;mg/g, respectively. Adsorption was demonstrated to be spontaneous, exothermic, and more physical than chemical in their native state. Also, the adsorption followed the pseudo-first-order kinetic model and Langmuir isotherm, indicating monolayer adsorption on a homogeneous surface.</p>

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Tailored NaAlSi2O6/Pb5Si3O11/Al2SiO5/SiO2/Polyethylene Glycol 400 Nanocomposite for Enhanced Disposal of Cd(II) Ions from Aqueous Environments

  • 期刊论文

  • 发表日期：

    2025年5月23日

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  • Maram T. Basha,
  • Ehab A. Abdelrahman,
  • Fawaz A. Saad,
  • Reem K. Shah,
  • Omar K. Alduaij

摘要

Cadmium ions are highly toxic and pose serious risks to human health and aquatic ecosystems due to their persistence and bioaccumulation. Chronic exposure can cause kidney dysfunction, skeletal damage, and cancer risk, making Cd(II) removal an urgent priority. In this work, two novel nanocomposites; NaAlSi2O6/Pb5Si3O11/Al2SiO5/SiO2 (HS) and its polyethylene glycol 400-modified counterpart (HP), were fabricated via hydrothermal processing for the successful disposal of Cd(II) ions from aqueous environments. X-ray diffraction (XRD) patterns verified the presence of crystalline phases in both samples, with average crystallite sizes of 70.52 nm for HS and 61.43 nm for HP, indicating the size-reducing effect of polyethylene glycol 400. Energy dispersive X-ray spectroscopy (EDX) analysis revealed a significant increase in carbon content in HP due to the incorporation of polyethylene glycol 400, along with variations in other elemental distributions. Field emission scanning electron microscope (FE-SEM) and high-resolution transmission electron microscope (HR-TEM) analyses demonstrated that HP exhibited a more spherical and uniform morphology compared to the irregular and aggregated structure of HS. The maximum adsorption capacities of HS and HP were 200.00 and 252.53 mg/g, respectively. Adsorption was demonstrated to be spontaneous, exothermic, and more physical than chemical in their native state. Also, the adsorption followed the pseudo-first-order kinetic model and Langmuir isotherm, indicating monolayer adsorption on a homogeneous surface.