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Extraction des complexes des lanthanidestrivalents avec différents acides aminopolyacétiques sur écchangeur d'ions préconditionné

✍ Scribed by F. Schoebrechts; E. Merciny; G. Duyckaerts


Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
964 KB
Volume
79
Category
Article
ISSN
1873-3778

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✦ Synopsis


The anion-exchange resin Dowex I X4 (100-200 mesh, Cl-form) was converted into the HEDTA or NTA form and the fixation of different protonated forms was studied over a wide pH range.

The distribution of trivalent lanthanides between these resins and a solution of HEDTA or EDTA was then investigated, The experimental results indicate that the extraction mechanism is a chelating reaction between HEDTA or NTA sorbed on the resin and the I : I complex Me(HEDTA) or Me(EDTA) in solution. The kinetics of extraction and the values of HETP obtained are in good agreement with a chelating reaction.


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