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ZrO

Tao Liu1, Jiankang Feng1, Yuqiu Wan1

  • 1State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China.

Chemosphere
|September 14, 2018
PubMed
Summary

Highly dispersed zirconium dioxide (ZrO2) particles within MIL-101, prepared using the double solvents method, show superior phosphate adsorption. This novel MIL-101@Zr(DS) material offers enhanced performance and stability for water treatment applications.

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Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Nanotechnology

Background:

  • Phosphate pollution is a significant environmental concern, necessitating effective water remediation strategies.
  • Metal-organic frameworks (MOFs) like MIL-101 offer high surface areas for pollutant adsorption.
  • Zirconium dioxide (ZrO2) is a promising material for phosphate removal, but its dispersion and efficiency can be challenging.

Purpose of the Study:

  • To develop a highly dispersed zirconium dioxide (ZrO2) confined within MIL-101 using a double solvents method (MIL-101@Zr(DS)).
  • To compare the phosphate adsorption performance of MIL-101@Zr(DS) with materials prepared via impregnation (MIL-101@Zr(I)) and deposition (MIL-101@Zr(D)) methods.
  • To investigate the influence of solution chemistry on phosphate adsorption and the regeneration capabilities of the synthesized materials.
Keywords:
ConfinementDouble solvents methodMetal organic frameworksPhosphate adsorptionZrO(2)

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Main Methods:

  • Synthesis of MIL-101@Zr(DS) via the double solvents method.
  • Synthesis of comparative samples MIL-101@Zr(I) and MIL-101@Zr(D) using impregnation and deposition methods, respectively.
  • Characterization of ZrO2 dispersion and loading within the MIL-101 structure.
  • Phosphate adsorption experiments under varying conditions (pH, coexisting ions, humic acid).

Main Results:

  • MIL-101@Zr(DS) exhibited significantly higher ZrO2 dispersion compared to MIL-101@Zr(I) and MIL-101@Zr(D).
  • The maximum phosphate adsorption capacity of MIL-101@Zr(DS) reached 21.28 mg P·g⁻¹, with a ZrO2 content normalized capacity of 1120.0 mg P·g⁻¹, outperforming other Zr-based adsorbents.
  • Phosphate adsorption on MIL-101@Zr(DS) was less sensitive to interfering anions and humic acid, and showed stable adsorption-desorption performance after regeneration under alkaline conditions.

Conclusions:

  • The double solvents method is highly effective for preparing highly dispersed ZrO2 within MIL-101 for enhanced phosphate adsorption.
  • MIL-101@Zr(DS) demonstrates superior adsorption capacity and stability compared to conventionally prepared materials.
  • This advanced adsorbent shows significant potential for practical applications in phosphate removal from contaminated water sources.