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<p>Efficiently removing uranium from aqueous solutions is a greatly challenging task. Nanoscale zero-valent iron (NZVI) is acknowledged as a potent material for extracting hexavalent uranium from aqueous solutions. Nonetheless, NZVI possesses the drawback of a tendency to agglomerate. Therefore, this study focused on preparing corn starch-supported nano-zero-valent iron (CS-NZVI) using iron salts sourced from a corn starch (CS) suspension for the removal of U(VI). The enhancement of dispersion in NZVI that is supported by CS was notably significant. The mechanism of electron transfer involving the material and elemental uranium, along with the adsorption of the relevant hydroxide, resulted in an enhanced removal efficiency.</p> Graphical abstract <p>Removal of U(VI) ions from aqueous solutions is considered a difficult task in industry. In this study, corn starch loaded with nano-zero-valent iron (CS-NZVI) was designed and synthesized to achieve efficient U(IV) removal from the material by a common synthesis method using liquid phase reduction. X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy with energy dispersive spectroscopy (SEM–EDS) were used to evaluate the samples. The elemental composition and amounts were ascertained by X-ray energy dispersive spectroscopy (EDS, Nova Nano SEM 450). The molecular structure and chemical content were examined using Fourier transform infrared spectroscopy (FT-IR). The elemental composition and valence states of material surfaces were examined using X-ray photoelectron spectroscopy (XPS). Additionally, the surface area, pore volume, and pore size distribution by nitrogen adsorption were assessed using the Brunauer–Emmett–Teller (BET, BELSORP-mini II) method.</p> <p></p>

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Research on the removal of uranium from aqueous solution by corn starch-loaded nano zero-valent iron materials

  • 期刊论文

  • 发表日期：

    2025年5月8日

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  • Han-Jin Shi,
  • Yi-Shuo Zhang,
  • Meng-Yue Ma,
  • Li Tang,
  • Wei-Xuan Sang,
  • Muhammad Saeed,
  • Xiao-Yan Li

摘要

Efficiently removing uranium from aqueous solutions is a greatly challenging task. Nanoscale zero-valent iron (NZVI) is acknowledged as a potent material for extracting hexavalent uranium from aqueous solutions. Nonetheless, NZVI possesses the drawback of a tendency to agglomerate. Therefore, this study focused on preparing corn starch-supported nano-zero-valent iron (CS-NZVI) using iron salts sourced from a corn starch (CS) suspension for the removal of U(VI). The enhancement of dispersion in NZVI that is supported by CS was notably significant. The mechanism of electron transfer involving the material and elemental uranium, along with the adsorption of the relevant hydroxide, resulted in an enhanced removal efficiency.

Graphical abstract

Removal of U(VI) ions from aqueous solutions is considered a difficult task in industry. In this study, corn starch loaded with nano-zero-valent iron (CS-NZVI) was designed and synthesized to achieve efficient U(IV) removal from the material by a common synthesis method using liquid phase reduction. X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy with energy dispersive spectroscopy (SEM–EDS) were used to evaluate the samples. The elemental composition and amounts were ascertained by X-ray energy dispersive spectroscopy (EDS, Nova Nano SEM 450). The molecular structure and chemical content were examined using Fourier transform infrared spectroscopy (FT-IR). The elemental composition and valence states of material surfaces were examined using X-ray photoelectron spectroscopy (XPS). Additionally, the surface area, pore volume, and pore size distribution by nitrogen adsorption were assessed using the Brunauer–Emmett–Teller (BET, BELSORP-mini II) method.