Effect of pKa of organophosphorus acidic extractants on the aggregation behavior of diglycolamide in n-dodecane

  • K. Rama Swami
  • K. A. VenkatesanEmail author


To understand the role of pKa of the organophsophorus acidic extractant on the reverse micellar aggregation behavior of the binary solution containing tetra-(2-ethylhexyl)diglycolamide (TEHDGA) + acidic extractant in n-dodecane, the extraction behavior of nitric acid and Nd(III) in the binary solution was studied. The acidic extractants chosen were bis(2,4,4-trimethylpentyl)phosphinic acid (CYANEX-272), bis(2-ethylhexyl)phosphonic acid (PC88A) and bis(2-ethylhexyl)phosphoric acid (HDEHP). The results revealed that the acidic extractant with lower pKa produced aggregates of smaller size, and therefore, the binary solution containing TEHDGA and HDEHP in n-DD was identified as the promising solvent for the extraction of trivalent metal ions from nuclear waste.


Solvent extraction Reverse micelles Dynamic light scattering Diglycolamide Organophosphorus acid Neodymium 


Compliance with ethical standards

Conflicts of interest

There are no conflicts to declare.

Supplementary material

10967_2019_6798_MOESM1_ESM.docx (76 kb)
Supplementary material 1 (DOCX 75 kb)


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Materials Chemistry and Metal Fuel Cycle GroupIndira Gandhi Centre for Atomic ResearchKalpakkamIndia
  2. 2.Homi Bhabha National InstituteMumbaiIndia

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