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Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis
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Microcolumn lanthanide separation using bis-(2-ethylhexyl) phosphoric acid functionalized ordered mesoporous carbon

Erin R Bertelsen1, Gauri Deodhar1, Kyle T Kluherz1

  • 1Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States.

Journal of Chromatography. A
|March 18, 2019
PubMed
Summary
This summary is machine-generated.

This study developed novel bis-(2-ethylhexyl) phosphoric acid-ordered mesoporous carbon (HDEHP-OMC) materials for challenging lanthanide separations. These materials show superior performance for separating elements like Europium (Eu3+) and Neodymium (Nd3+).

Keywords:
Bis-2-ethylhexyl phosphoric acidChromatographyEuropiumFunctionalized ordered mesoporous carbonHDEHPNeodymiumRare earth elementsSeparations

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Area of Science:

  • Materials Science
  • Separation Science
  • Radiochemistry

Background:

  • Separating adjacent lanthanides is a significant challenge in chemistry, necessitating advanced separation materials.
  • Ordered mesoporous carbon (OMC) materials offer unique structural properties, including small mesh size and uniform morphology, making them promising for separation applications.

Purpose of the Study:

  • To investigate the potential of bis-(2-ethylhexyl) phosphoric acid (HDEHP) functionalized OMC materials for lanthanide separation.
  • To evaluate the sorption performance of HDEHP-OMC for Europium (Eu3+) under static and dynamic conditions.

Main Methods:

  • Physisorption of bis-(2-ethylhexyl) phosphoric acid (HDEHP) onto ordered mesoporous carbon (OMC).
  • Investigation of Eu3+ sorption using HDEHP-OMC under static and dynamic experimental conditions.
  • Chromatographic separation experiments using a small, unpressurized column to test Eu3+ and Neodymium (Nd3+) separation.

Main Results:

  • HDEHP-OMC materials exhibited significantly higher distribution coefficients and loading capacities compared to existing state-of-the-art separation materials.
  • Successful chromatographic separation of Eu3+ from Nd3+ was demonstrated using a simple, unpressurized column setup.
  • The developed HDEHP-OMC sorbent shows enhanced performance for intragroup lanthanide separations.

Conclusions:

  • Functionalized ordered mesoporous carbon materials (HDEHP-OMC) represent a transformative advancement for lanthanide separation.
  • These materials hold significant potential as effective solid-phase sorbents for chromatographic separation of closely related lanthanides.
  • The study highlights the efficacy of HDEHP-OMC in addressing critical challenges in intragroup lanthanide separation.