Voltamperometric determination of uranium and plutonium in alkaline solutions

Abuzwida, M.A.; Maslennikov, A. G.; Peretrukhin, V.F.

doi:10.1007/bf02039564

Cited by 7 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The additional potential drop is accounted for by the decrease of the y3-/y2-ratio and by the decrease of water activity. The slope of this curve in dilute alkaline solutions, equal to -1.5 x 0.059, proves that the electrochemical process may occur by two parallel pathways (1) and ( …”

Section: -10mentioning

confidence: 75%

“…U(V1) and Pu(V1,V) were shown to be determined in 1 to 4 M NaOH solutions with a dropping mercury electrode, using direct current or differential pulse polarography. Np(VII,VI,V) (Peretrukhin and Alekseeva 1975), U(VI), Pu(VI,V) and Abuzwida et al 1991), Pu(VI1) , and Am(V1,V) ) voltametric determination in alkaline solutions is described. (Peretrukhin and Alekseeva 1975).…”

Section: Electrochemical Methods Of Determination Of Actinides and Tementioning

confidence: 99%

“…Simultaneous determination of U(VI), Pu(VI), and Pu(V) in alkaline media has been elaborated by means of direct current and differential pulse polarography (Abuzwida et al 1991). In 1 to 4 M NaOH, U(V1) is reduced at a dropping mercury electrode to U(V) at a half-wave potential 3b -DC polarogram at DME, process P u O + 2e-+ Pu(III).…”

Section: Electrochemical Methods Of Determination Of Actinides and Tementioning

confidence: 99%

See 2 more Smart Citations

Alkaline chemistry of transuranium elements and technetium and the treatment of alkaline radioactive wastes

Delegard¹,

Peretrukhin²,

Shilov³

et al. 1995

View full text Add to dashboard Cite

Section: -10mentioning

confidence: 75%

Section: Electrochemical Methods Of Determination Of Actinides and Tementioning

confidence: 99%

Section: Electrochemical Methods Of Determination Of Actinides and Tementioning

confidence: 99%

See 1 more Smart Citation

Alkaline chemistry of transuranium elements and technetium and the treatment of alkaline radioactive wastes

Delegard¹,

Peretrukhin²,

Shilov³

et al. 1995

View full text Add to dashboard Cite

“…Uranium concentrations were determined spectrophotometrically with arsenazo-III after having first been acidified with nitric acid (Riabchikov and Seniavin 1963). Uranium concentrations sometimes also were analyzed polarographically'directly in the alkaline solutions by the limiting current of the U(VI) + e-+ U(V) wave (Abuzwida et al 1991).…”

Section: Experimental Materials and Analysesmentioning

confidence: 99%

Purification of alkaline solutions and wastes from actinides and technetium by coprecipitation with some carriers using the method of appearing reagents: Final Report

Peretrukhin¹,

Silin²,

Kareta³

et al. 1998

View full text Add to dashboard Cite

The coprecipitation of transuranium elements and technetium from alkaline solutions and from simulants of Hanford Site tank wastes has been studied in reducing and oxidizing conditions on uranium(IV,vT) hydroxocompounds, tetraakylammonium perrhenate and perchlorate, and on hydroxides of Fe(m), Co(III), Mn(II), and C r o using the Method of Appearing Reagents (MAR). Coprecipitations in alkaline solution have been shown to give high decontamination factors (DF) at low content of carrier and in the presence of high salt concentrations.Uranium(IV) hydroxide in concentrations higher than 3~1 0 -~ M coprecipitates Pu and Cm in any oxidation state from 0.2 to 4 M NaOH with DFs of 110 to lo00 and Np and Tc with DFs of 51 to 176. UraniumCvI), introduced as a sodium uranate precipitate or the soluble peroxocomplex salt NaUO2(02)3, can be partially reduced in 0.2 to 2 M NaOH by hydrazine to U30~.nH20 in the presence of (1 to 5 )~1 0 -~ M Tc(VII). The Tc(VlI) is first reduced to Tc(IV). The product U308.nH20, at 0.012 to 0.05 M uranium, coprecipitates Np, Pu, Cm, and Tc in any oxidation state with DFs greater than 100 from 0.2 to 1.5 M NaOH. Increasing alkali concentration to 4 M NaOH decreases the DFs slightly for TRU and drastically for Tc. Coprecipitation under the same conditions from simulated tank waste containing 3.2 M NaOH, 0.04 M C1-05-and 11 complex-forming salts yields the following DFs: Np-12, Pu-27, Cm-35, Tc-3. The decrease of DFs in the waste simulant is associated with complex formation and with inhibition of Np and Tc coprecipitation by the Cr(m) hydroxide that is formed before Np(IV) and Tc(IV). Coprecipitated Tc may be effectively leached from U30p-nH20 by oxidation of Tc(IV) to Tc(VII) by use of dilute H202 or by NaOH solution and air bubbling. Under these same conditions, more than 99% of the Pu is retained in the solid phase. iii

show abstract

“…It is interesting to iiote in comparison that U(VI) hydroxo compounds (uranates and polyuranates) also give metastable solutions in sodium hydroxide media. Uranium(V1) concentrations in 1 M NaOH reach l(r3 M in the first 1 to 2 hours after precipitation under special conditions before slowly decreasing to 2 X l@ M (Abuzwida et al 1991).…”

Section: Np(vi) Pu(vi) and Am(vi) Hydroxo Compoundsmentioning

confidence: 99%

Determination of the solubility of Np(IV), Pu(III) - (VI),Am(III) - (VI), and Te(IV), (V) hydroxo compounds in 0.5 - 14 M NaOH solutions

Delegard¹

1996

View full text Add to dashboard Cite

Voltamperometric determination of uranium and plutonium in alkaline solutions

Cited by 7 publications

References 4 publications

Alkaline chemistry of transuranium elements and technetium and the treatment of alkaline radioactive wastes

Alkaline chemistry of transuranium elements and technetium and the treatment of alkaline radioactive wastes

Purification of alkaline solutions and wastes from actinides and technetium by coprecipitation with some carriers using the method of appearing reagents: Final Report

Determination of the solubility of Np(IV), Pu(III) - (VI),Am(III) - (VI), and Te(IV), (V) hydroxo compounds in 0.5 - 14 M NaOH solutions

Contact Info

Product

Resources

About