Procedures for determination of 239,240Pu, 241Am, 237Np, 234,238U, 228,230,232Th, 99Tc and 210Pb-210Po in environmental materials

Q.J. Chen; Asker Aarkrog; Sven Poul Nielsen; Henning Dahlgaard; B. Lind; A.K. Kolstad; Yixuan Yu

Procedures for determination of ²³⁹^,²⁴⁰Pu, ²⁴¹Am, ²³⁷Np, ²³⁴^,²³⁸U, ²²⁸^,²³⁰^,²³²Th, ⁹⁹Tc and ²¹⁰Pb-²¹⁰Po in environmental materials

Q.J. Chen, Asker Aarkrog, Sven Poul Nielsen, Henning Dahlgaard, B. Lind, A.K. Kolstad, Yixuan Yu

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Abstract

A procedure for the determination of plutonium in seawater is described. The
plutonium is pre-concentrated by scavenging with Fe(OH)2 and Fe(OH)3 .This purifies for Ca²⁺, Mg²⁺ and amphoteric elements. The method is based on a new procedure in which the principle of controlled valence is applied. The redox system SO₃^2- / NO^2- was used (1) first to reduce to Pu³⁺ and afterwards to oxidize to Pu⁴⁺. The Pu³⁺ is separated from U and 210 Po by solvent extraction with TIOA – 6-10 M HCl. Followed by anion exchange of Pu⁴⁺ in 8 M HNO₃. The decontamination factors of the procedure are >1.7 ⋅ 106 for U and >6.3 ⋅ 104 for Th. The chemical yield is 70-85%.

Original language	English

Place of Publication	Roskilde
Publisher	Risø National Laboratory
Number of pages	33
ISBN (Print)	87-550-2966-3
ISBN (Electronic)	87-550-2966-3
Publication status	Published - 2001

Series	Denmark. Forskningscenter Risoe. Risoe-R
Number	1263(EN)
ISSN	0106-2840

Keywords

Risø-R-1263
Risø-R-1263(EN)

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@book{348767a54ac6415c9f20ac74b185d8ba,

title = "Procedures for determination of 239,240Pu, 241Am, 237Np, 234,238U, 228,230,232Th, 99Tc and 210Pb-210Po in environmental materials",

abstract = "A procedure for the determination of plutonium in seawater is described. Theplutonium is pre-concentrated by scavenging with Fe(OH)2 and Fe(OH)3 .This purifies for Ca2+, Mg2+ and amphoteric elements. The method is based on a new procedure in which the principle of controlled valence is applied. The redox system SO32- / NO2- was used (1) first to reduce to Pu3+ and afterwards to oxidize to Pu4+. The Pu3+ is separated from U and 210 Po by solvent extraction with TIOA – 6-10 M HCl. Followed by anion exchange of Pu4+ in 8 M HNO3. The decontamination factors of the procedure are >1.7 ⋅ 106 for U and >6.3 ⋅ 104 for Th. The chemical yield is 70-85%.",

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TY - RPRT

T1 - Procedures for determination of 239,240Pu, 241Am, 237Np, 234,238U, 228,230,232Th, 99Tc and 210Pb-210Po in environmental materials

AU - Chen, Q.J.

AU - Aarkrog, Asker

AU - Nielsen, Sven Poul

AU - Dahlgaard, Henning

AU - Lind, B.

AU - Kolstad, A.K.

AU - Yu, Yixuan

PY - 2001

Y1 - 2001

N2 - A procedure for the determination of plutonium in seawater is described. Theplutonium is pre-concentrated by scavenging with Fe(OH)2 and Fe(OH)3 .This purifies for Ca2+, Mg2+ and amphoteric elements. The method is based on a new procedure in which the principle of controlled valence is applied. The redox system SO32- / NO2- was used (1) first to reduce to Pu3+ and afterwards to oxidize to Pu4+. The Pu3+ is separated from U and 210 Po by solvent extraction with TIOA – 6-10 M HCl. Followed by anion exchange of Pu4+ in 8 M HNO3. The decontamination factors of the procedure are >1.7 ⋅ 106 for U and >6.3 ⋅ 104 for Th. The chemical yield is 70-85%.

AB - A procedure for the determination of plutonium in seawater is described. Theplutonium is pre-concentrated by scavenging with Fe(OH)2 and Fe(OH)3 .This purifies for Ca2+, Mg2+ and amphoteric elements. The method is based on a new procedure in which the principle of controlled valence is applied. The redox system SO32- / NO2- was used (1) first to reduce to Pu3+ and afterwards to oxidize to Pu4+. The Pu3+ is separated from U and 210 Po by solvent extraction with TIOA – 6-10 M HCl. Followed by anion exchange of Pu4+ in 8 M HNO3. The decontamination factors of the procedure are >1.7 ⋅ 106 for U and >6.3 ⋅ 104 for Th. The chemical yield is 70-85%.

KW - Nuklear sikkerhed

KW - Risø-R-1263

KW - Risø-R-1263(EN)

M3 - Report

SN - 87-550-2966-3

T3 - Denmark. Forskningscenter Risoe. Risoe-R

BT - Procedures for determination of 239,240Pu, 241Am, 237Np, 234,238U, 228,230,232Th, 99Tc and 210Pb-210Po in environmental materials

PB - Risø National Laboratory

CY - Roskilde

ER -