Technetium behaviour in Boom Clay - A laboratory and field study

Graham M.N. Baston; P. R. De Cannière; D. J. Ilett; M. M. Cowper; N. J. Pilkington; Cherry J. Tweed; L. Wang; Stephen J. Williams

doi:10.1524/ract.2002.90.9-11_2002.735

Technetium behaviour in Boom Clay - A laboratory and field study

Graham M.N. Baston, P. R. De Cannière, D. J. Ilett, M. M. Cowper, N. J. Pilkington, Cherry J. Tweed, L. Wang, Stephen J. Williams

Research output › peer-review

Abstract

This paper describes a study of technetium solubility and migration under chemical conditions representative of those prevailing in a Boom Clay environment. Laboratory and in situ measurements yielded similar aqueous concentrations of technetium, of about 1 × 10^-8 mol dm^-3, close to the concentrations measured for hydrated technetium(IV) oxide TcO₂·1.6H₂O in the solubility studies. From fitting the curves of the Tc concentrations as function of time, distribution coefficient (K_d) values were estimated to lie between 0.8 cm³ g^-1 and 1.8cm³g^-1. Exposure of the system at 80°C and to γ-radiation dose rates of several hundred Gyh^-1 resulted in only minor differences in behaviour.

Original language	English
Pages (from-to)	735-740
Number of pages	6
Journal	Radiochimica Acta
Volume	90
Issue number	9-11
DOIs	https://doi.org/10.1524/ract.2002.90.9-11_2002.735
State	Published - 2002

ASJC Scopus subject areas

Physical and Theoretical Chemistry

Access to Document

10.1524/ract.2002.90.9-11_2002.735

Cite this

@article{b098c6f67bd74ed2bf627f2edada369e,

title = "Technetium behaviour in Boom Clay - A laboratory and field study",

abstract = "This paper describes a study of technetium solubility and migration under chemical conditions representative of those prevailing in a Boom Clay environment. Laboratory and in situ measurements yielded similar aqueous concentrations of technetium, of about 1 × 10-8 mol dm-3, close to the concentrations measured for hydrated technetium(IV) oxide TcO2·1.6H2O in the solubility studies. From fitting the curves of the Tc concentrations as function of time, distribution coefficient (Kd) values were estimated to lie between 0.8 cm3 g-1 and 1.8cm3g-1. Exposure of the system at 80°C and to γ-radiation dose rates of several hundred Gyh-1 resulted in only minor differences in behaviour.",

keywords = "Boom Clay, Radionuclide migration, Solubility, Technetium",

author = "Baston, {Graham M.N.} and {De Canni{\`e}re}, {P. R.} and Ilett, {D. J.} and Cowper, {M. M.} and Pilkington, {N. J.} and Tweed, {Cherry J.} and L. Wang and Williams, {Stephen J.}",

year = "2002",

doi = "10.1524/ract.2002.90.9-11_2002.735",

language = "English",

volume = "90",

pages = "735--740",

journal = "Radiochimica Acta",

issn = "0033-8230",

publisher = "R. Oldenbourg",

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TY - JOUR

T1 - Technetium behaviour in Boom Clay - A laboratory and field study

AU - Baston, Graham M.N.

AU - De Cannière, P. R.

AU - Ilett, D. J.

AU - Cowper, M. M.

AU - Pilkington, N. J.

AU - Tweed, Cherry J.

AU - Wang, L.

AU - Williams, Stephen J.

PY - 2002

Y1 - 2002

N2 - This paper describes a study of technetium solubility and migration under chemical conditions representative of those prevailing in a Boom Clay environment. Laboratory and in situ measurements yielded similar aqueous concentrations of technetium, of about 1 × 10-8 mol dm-3, close to the concentrations measured for hydrated technetium(IV) oxide TcO2·1.6H2O in the solubility studies. From fitting the curves of the Tc concentrations as function of time, distribution coefficient (Kd) values were estimated to lie between 0.8 cm3 g-1 and 1.8cm3g-1. Exposure of the system at 80°C and to γ-radiation dose rates of several hundred Gyh-1 resulted in only minor differences in behaviour.

AB - This paper describes a study of technetium solubility and migration under chemical conditions representative of those prevailing in a Boom Clay environment. Laboratory and in situ measurements yielded similar aqueous concentrations of technetium, of about 1 × 10-8 mol dm-3, close to the concentrations measured for hydrated technetium(IV) oxide TcO2·1.6H2O in the solubility studies. From fitting the curves of the Tc concentrations as function of time, distribution coefficient (Kd) values were estimated to lie between 0.8 cm3 g-1 and 1.8cm3g-1. Exposure of the system at 80°C and to γ-radiation dose rates of several hundred Gyh-1 resulted in only minor differences in behaviour.

KW - Boom Clay

KW - Radionuclide migration

KW - Solubility

KW - Technetium

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DO - 10.1524/ract.2002.90.9-11_2002.735

M3 - Article

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SN - 0033-8230

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JO - Radiochimica Acta

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