Synergistic extraction of thorium(IV) and uranium(VI) by 2-ethylehexyl phenylphosphonic acid and micelles of dinonyl naphthalene sulphonic acid

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Solvent Extraction and Ion Exchange

DOI:https://doi.org/10.1080/07366299708934462· OSTI ID:466334

Otu, E O ^[1]

---

1. State Univ. of New York, Purchase, NY (United States)

The extraction of thorium(IV) and uranium(VI) from nitric acid solutions into ligroine solutions of 2-ethylhexyl phenylphosphonic acid (HEH{Phi}P), micellar dinonyl naphthalene sulphonic acid (HDNNS) extractants and mixture of the two extractants is reported. A synergistic enhancement factor of 66.9 and 10.8 were observed for Th and U, respectively, when extracted form 1M HNO{sub 3}. Although HDNNS shows better separation of thorium and uranium, the mixed ligand system exhibits superior extractability for both metal ions. Slope analysis method was used to establish the extraction stoichiometry. The extraction stoichiometry varies as the concentration of the micellar HDNNS in the organic phase and the acidity of the aqueous phase changes. 25 refs., 4 figs., 1 tab.

• Sponsoring Organization: USDOE
• OSTI ID: 466334
• Journal Information: Solvent Extraction and Ion Exchange, Journal Name: Solvent Extraction and Ion Exchange Journal Issue: 1 Vol. 15; ISSN 0736-6299; ISSN SEIEDB
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ABUNDANCE
DISTRIBUTION FUNCTIONS
MICELLAR SYSTEMS
MIXTURES
PH VALUE
PHOSPHONIC ACIDS
SOLVENT EXTRACTION
STOICHIOMETRY
SULFONIC ACIDS
THORIUM
URANIUM