Abstract
A simple and efficient procedure has been developed to quantitatively recover Pu from oxalate bearing solutions using a mixture of octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) and TBP in dodecane. Pu(IV) in the range of 6.9 to 34.6 mg/1 was quantitatively extracted into 0.2 M CMPO+ 1.2 M TBP in dodecane from an aqueous solution containing 3.0 M HNO{sub 3} and 0.1 M H{sub 2}C{sub 2}O{sub 4}. At such low concentrations of Pu, the distribution ratio (D) did not change but the increase in oxalic acid concentration drastically reduced these values. The variation in HNO{sub 3} concentration at a fixed concentration of 0.2 M CMPO + 1.2 M TBP has shown a dramatic increase in the D values, being 0.3 at 1.0 M and > 10{sup 4} at 7.5 M. The extraction was almost quantitative even at the aqueous to organic ratio of 10:1. Plutonium could be quantitatively recovered (i) by stripping with 0.5 M acetic acid and (ii) by coprecipitating it directly from the organic phase with 0.3 M oxalic acid + 0.3 M calcium nitrate + sodium nitrite. {approx} 92% of the Pu was found in the precipitate and {approx}7% in the supernatant. Using this procedure Pu, in a concentrated form
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Mathur, J N;
Murali, M S;
Rizvi, G H;
Iyer, R H;
[1]
Badheka, L P;
Banerji, A;
[2]
Michael, K M;
Kapoor, S C;
Dhumwad, R K
[3]
- Bhabha Atomic Research Centre, Bombay (India). Radiochemistry Div.
- Bhabha Atomic Research Centre, Bombay (India). Bio-organic Div.
- Bhabha Atomic Research Centre, Bombay (India). Fuel Reprocessing Div.
Citation Formats
Mathur, J N, Murali, M S, Rizvi, G H, Iyer, R H, Badheka, L P, Banerji, A, Michael, K M, Kapoor, S C, and Dhumwad, R K.
Recovery of plutonium from oxalate bearing solutions using a mixture of CMPO and TBP.
India: N. p.,
1993.
Web.
Mathur, J N, Murali, M S, Rizvi, G H, Iyer, R H, Badheka, L P, Banerji, A, Michael, K M, Kapoor, S C, & Dhumwad, R K.
Recovery of plutonium from oxalate bearing solutions using a mixture of CMPO and TBP.
India.
Mathur, J N, Murali, M S, Rizvi, G H, Iyer, R H, Badheka, L P, Banerji, A, Michael, K M, Kapoor, S C, and Dhumwad, R K.
1993.
"Recovery of plutonium from oxalate bearing solutions using a mixture of CMPO and TBP."
India.
@misc{etde_10130457,
title = {Recovery of plutonium from oxalate bearing solutions using a mixture of CMPO and TBP}
author = {Mathur, J N, Murali, M S, Rizvi, G H, Iyer, R H, Badheka, L P, Banerji, A, Michael, K M, Kapoor, S C, and Dhumwad, R K}
abstractNote = {A simple and efficient procedure has been developed to quantitatively recover Pu from oxalate bearing solutions using a mixture of octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) and TBP in dodecane. Pu(IV) in the range of 6.9 to 34.6 mg/1 was quantitatively extracted into 0.2 M CMPO+ 1.2 M TBP in dodecane from an aqueous solution containing 3.0 M HNO{sub 3} and 0.1 M H{sub 2}C{sub 2}O{sub 4}. At such low concentrations of Pu, the distribution ratio (D) did not change but the increase in oxalic acid concentration drastically reduced these values. The variation in HNO{sub 3} concentration at a fixed concentration of 0.2 M CMPO + 1.2 M TBP has shown a dramatic increase in the D values, being 0.3 at 1.0 M and > 10{sup 4} at 7.5 M. The extraction was almost quantitative even at the aqueous to organic ratio of 10:1. Plutonium could be quantitatively recovered (i) by stripping with 0.5 M acetic acid and (ii) by coprecipitating it directly from the organic phase with 0.3 M oxalic acid + 0.3 M calcium nitrate + sodium nitrite. {approx} 92% of the Pu was found in the precipitate and {approx}7% in the supernatant. Using this procedure Pu, in a concentrated form ({approx}50 times), could be recovered from the oxalate bearing solutions without recourse to the destruction of oxalate ion. The slope of 2 from the nitrate ion as well as CMPO variation experiments suggest the species in the organic phase to be PuC{sub 2}O{sub 4}(NO{sub 3}){sub 2}.2CMPO. The absorption spectral study of Pu(IV) confirmed the above species in the organic phase. (author). 19 refs., 5 figs., 9 tabs.}
place = {India}
year = {1993}
month = {Dec}
}
title = {Recovery of plutonium from oxalate bearing solutions using a mixture of CMPO and TBP}
author = {Mathur, J N, Murali, M S, Rizvi, G H, Iyer, R H, Badheka, L P, Banerji, A, Michael, K M, Kapoor, S C, and Dhumwad, R K}
abstractNote = {A simple and efficient procedure has been developed to quantitatively recover Pu from oxalate bearing solutions using a mixture of octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) and TBP in dodecane. Pu(IV) in the range of 6.9 to 34.6 mg/1 was quantitatively extracted into 0.2 M CMPO+ 1.2 M TBP in dodecane from an aqueous solution containing 3.0 M HNO{sub 3} and 0.1 M H{sub 2}C{sub 2}O{sub 4}. At such low concentrations of Pu, the distribution ratio (D) did not change but the increase in oxalic acid concentration drastically reduced these values. The variation in HNO{sub 3} concentration at a fixed concentration of 0.2 M CMPO + 1.2 M TBP has shown a dramatic increase in the D values, being 0.3 at 1.0 M and > 10{sup 4} at 7.5 M. The extraction was almost quantitative even at the aqueous to organic ratio of 10:1. Plutonium could be quantitatively recovered (i) by stripping with 0.5 M acetic acid and (ii) by coprecipitating it directly from the organic phase with 0.3 M oxalic acid + 0.3 M calcium nitrate + sodium nitrite. {approx} 92% of the Pu was found in the precipitate and {approx}7% in the supernatant. Using this procedure Pu, in a concentrated form ({approx}50 times), could be recovered from the oxalate bearing solutions without recourse to the destruction of oxalate ion. The slope of 2 from the nitrate ion as well as CMPO variation experiments suggest the species in the organic phase to be PuC{sub 2}O{sub 4}(NO{sub 3}){sub 2}.2CMPO. The absorption spectral study of Pu(IV) confirmed the above species in the organic phase. (author). 19 refs., 5 figs., 9 tabs.}
place = {India}
year = {1993}
month = {Dec}
}