The determination of the oxidation states of tracer uranium, neptunium and plutonium in aqueous media

Foti, S.; Freiling, E.C.

doi:10.1016/0039-9140(64)80047-3

Cited by 70 publications

(30 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The TTA (thenoyltrifluoroacetone) extraction technique [8] was employed for Np speciation. The final filtrate for solubility measurement was reacidified to 1 Μ HCl.…”

Section: Methodsmentioning

confidence: 99%

“…Both reactions (7) and (8) indicate that the species Np(0H) 2 (C0 3 ) 2 " and Np(0H) 4 (HC0 3 )|" increase with appearing HCOJ, but, because HCOJ will convert to C0 3~ with increasing pH, these species tend Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 7/23/15 5:08 PM to decrease at high pH. Above pH 10, on the other hand, CO!…”

Section: Stability Constant Of Np(iv) Hydroxycarbonate Complexesmentioning

confidence: 99%

See 1 more Smart Citation

Carbonate Complexation of Neptunium(IV) and Analogous Complexation of Ground-Water Uranium

1990

View full text Add to dashboard Cite

The solubility of Np(IV) in a carbonate solution in the pH range of 8 -12.5 was studied. The total carbonate concentration was varied between 5xl0~4 -5xl0~3 M. The result was interpreted by considering two kinds of reactions:a. below pH 10 where bicarbonate ion was the dominant species,or, Np(OH) 4(am) + 2HCO3-= Np(0H) 4 (HC0 3 )r, jq-0.35±033b. above pH 10 where carbonate ion was considered predominant, Np(OH) 4(am) + 2CO3 = Np(0H) 4 (C0 3 )r K=XQ -1.43 + 0.33The solubility of uranium in Swedish ground-water was analyzed by assuming the presence of a typical complex of U(0H) 2 (C0 3 )2~, and a good agreement was achieved with the data observed. The recommended stability constant of U(0H) 2 (C0 3 )2~ was estimated to be >10 41 · 70 . This suggests the importance of such complex species in the natural environment.

show abstract

“…The TTA (thenoyltrifluoroacetone) extraction technique [8] was employed for Np speciation. The final filtrate for solubility measurement was reacidified to 1 Μ HCl.…”

Section: Methodsmentioning

confidence: 99%

Section: Stability Constant Of Np(iv) Hydroxycarbonate Complexesmentioning

confidence: 99%

Carbonate Complexation of Neptunium(IV) and Analogous Complexation of Ground-Water Uranium

1990

View full text Add to dashboard Cite

show abstract

“…The Pu(IV) fraction was calculated by difference. Separation of Pu oxidation states by solvent extraction was performed using 0.5 M bis-(ethylhexyl)-phosphoric acid (HDEHP) in xylene and 0.025 M 4-benzyol-3-methyl-1-phenyl-2-pyrazolin-5-one (PMBP) in xylene as the extractants (Bertrand and Choppin, 1982;Foti and Freiling, 1964;Neu et al, 1994;Nitsche et al, 1988). The Pu oxidation state distribution in the working solution was determined using both HDEHP and PMBP as extractants.…”

Section: Pu Oxidation State Analysismentioning

confidence: 99%

Development of a Composite Non-Electrostatic Surface Complexation Model Describing Plutonium Sorption to Aluminosilicates

Powell¹,

Kersting²,

Zavarin³

et al. 2008

View full text Add to dashboard Cite

“…The combined aqueous phase is evaporated on a watch glass and counted. 136 Procedure 13 Plutonium from Environmental Water Samples J Kooi and U HoUstem (Ref. 237) Outline of Method BiPO .…”

mentioning

confidence: 99%

The Radiochemistry of Plutonium

Coleman¹

1965

View full text Add to dashboard Cite

The determination of the oxidation states of tracer uranium, neptunium and plutonium in aqueous media

Cited by 70 publications

References 5 publications

Carbonate Complexation of Neptunium(IV) and Analogous Complexation of Ground-Water Uranium

Carbonate Complexation of Neptunium(IV) and Analogous Complexation of Ground-Water Uranium

Development of a Composite Non-Electrostatic Surface Complexation Model Describing Plutonium Sorption to Aluminosilicates

The Radiochemistry of Plutonium

Contact Info

Product

Resources

About