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Cloud point extraction an alternative to

Alain Favre-Réguillon, Micheline Draye

2026encloud point extractionlanthanidesliquid–liquid extractionsurfactantsmetal separationchelation

Abstract

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Cloud point extraction (CPE) was utilized to extract and separate lanthanum(III) and gadolinium(III) nitrate from an aqueous solution. The methodology employed involved the formation of lanthanide(III)-8-hydroxyquinoline (8-HQ) complexes which are soluble in a micellar phase of non-ionic surfactant. Subsequently, these lanthanide(III) complexes were extracted into the surfactant-rich phase when the temperature exceeded the cloud point temperature (CPT). It was identified that the structure of the non-ionic surfactant and the chelating agent–metal molar ratio are critical factors influencing both the extraction efficiency and selectivity. In scenarios with equimolar concentrations of La(III) and Gd(III), the extraction efficiency for Gd(III) was observed to reach 96%, coupled with a Gd(III)/La(III) selectivity exceeding 30 when Triton X-114 was used. Under these optimal conditions, a Gd(III) decontamination factor of 50 was obtained.

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Cite This Work

@article{bcc3ac81-7cf9-454e-b439-a93267668c10,
  title={Cloud point extraction an alternative to},
  author={Alain Favre-Réguillon and Micheline Draye},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - Cloud point extraction an alternative to
AU  - Alain Favre-Réguillon
AU  - Micheline Draye
PY  - 2026
LA  - en
ER  -

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