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A novel CPE procedure by oil-in-water microemulsion for preconcentrating and analyzing thorium and uranium

  • Lipei Jia , Zejun Li , Weiqun Shi and Xinghai Shen EMAIL logo
Published/Copyright: March 18, 2022
Radiochimica Acta
From the journal Radiochimica Acta Volume 110 Issue 4

Abstract

A novel cloud point extraction (CPE) procedure was developed to preenrich Th4+ and UO22+ by oil-in-water (O/W) microemulsion. Coupling CPE to ICP-MS, the separation and analysis were achieved at a trace level, in which the low detection limits were 0.019 and 0.042 ng mL−1 for Th(IV) and U(VI), respectively. N,N′-diethyl-N,N′-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen), as an extremely hydrophobic extractant, was failed to dissolve in single or mixed micelles, but was successfully solubilized to CPE system owing to O/W microemulsion. The extraction efficiency and selectivity for Th4+ and UO22+ were excellent under acidic condition of 1.0 mol L−1 HNO3, and the recovery of ultra-trace Th4+ and UO22+ was almost 100% even at the presence of large amounts of lanthanides, exhibiting high tolerance limits for lanthanides. The solubilization, extraction and coordination behaviours were studied systematically via DLS, UV–vis, 1H NMR and FT-IR. Moreover, the solubilization of N,N′-dioctyl-N,N′-dioctyl-2,9-diamide-1,10-phenanthroline (Oct-Oct-DAPhen) and efficient extraction for UO22+ were also realized by O/W microemulsion, which further proved the feasibility of the method.

Keywords: acidic condition; cloud point extraction; ICP-MS; O/W microemulsion; Th(IV) and U(VI)
Corresponding author: Xinghai Shen, Beijing National Laboratory for Molecular Sciences (BNLMS), Fundamental Science on Radiochemistry and Radiation Chemistry Laboratory, Center for Applied Physics and Technology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China, E-mail:

Funding source: Science Challenge Project

Award Identifier / Grant number: TZ2016004

Funding source: National Natural Science Foundation of China http://dx.doi.org/10.13039/501100001809

Award Identifier / Grant number: U1830202

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work was financially supported by the Science Challenge Project (TZ2016004) and the National Natural Science Foundation of China (Grant No. U1830202).

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-12-15
Accepted: 2022-02-21
Published Online: 2022-03-18
Published in Print: 2022-04-26

© 2022 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Original Papers
  3. Unique transport behaviour of Am(III)/Eu(III) ions across a supported liquid membrane containing a TREN-based diglycolamide dendrimer ligand
  4. A novel CPE procedure by oil-in-water microemulsion for preconcentrating and analyzing thorium and uranium
  5. Separation of 103Pd from a Rh target using an alloying pretreatment with bismuth
  6. Experimental and computational study of rafoxanide radioiodination via isotopic exchange reaction
  7. Preparation, biological evaluation and radiolabeling of [99mTc]-technetium tricarbonyl procainamide as a tracer for heart imaging in mice
  8. Gamma radiation shielding performance and physico-chemical properties of poly (vinyl alcohol)/Cd(NO3)2 composite films
https://doi.org/10.1515/ract-2021-1139
Keywords for this article
acidic condition; cloud point extraction; ICP-MS; O/W microemulsion; Th(IV) and U(VI)

Articles in the same Issue

  1. Frontmatter
  2. Original Papers
  3. Unique transport behaviour of Am(III)/Eu(III) ions across a supported liquid membrane containing a TREN-based diglycolamide dendrimer ligand
  4. A novel CPE procedure by oil-in-water microemulsion for preconcentrating and analyzing thorium and uranium
  5. Separation of 103Pd from a Rh target using an alloying pretreatment with bismuth
  6. Experimental and computational study of rafoxanide radioiodination via isotopic exchange reaction
  7. Preparation, biological evaluation and radiolabeling of [99mTc]-technetium tricarbonyl procainamide as a tracer for heart imaging in mice
  8. Gamma radiation shielding performance and physico-chemical properties of poly (vinyl alcohol)/Cd(NO3)2 composite films
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