Supercritical water pretreatment method for analysis of strontium and uranium in soil (Andosols)

Mika Nagaoka; Hiroki Fujita; Taku Michael Aida; Haixin Guo; Richard Lee Smith

doi:10.1016/j.apradiso.2020.109465

Supercritical water pretreatment method for analysis of strontium and uranium in soil (Andosols)

Mika Nagaoka, Hiroki Fujita, Taku Michael Aida, Haixin Guo, Richard Lee Smith

ENV - Frontier Science for Advanced Environment

Research output: Contribution to journal › Article › peer-review

Abstract

Hydrothermal pretreatment of soils (Andosols) from Ibaraki prefecture (Japan) was used to improve methods for monitoring radioactive Sr and U. Calcined samples were pretreated with subcritical or supercritical water (SCW) followed by extraction with 0.5 M HNO₃ solutions. With SCW pretreatment, recoveries of Sr and U were 70% and 40%, respectively. Experimental recoveries obtained can be described by a linear relationship in water density. The proposed method is robust and can lower environmental burden of routine analytical protocols.

Original language	English
Article number	109465
Journal	Applied Radiation and Isotopes
Volume	168
DOIs	https://doi.org/10.1016/j.apradiso.2020.109465
Publication status	Published - 2021 Feb

Keywords

Analytical methods
Hydrothermal pretreatment
Soil monitoring
Strontium
Uranium

ASJC Scopus subject areas

Radiation

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title = "Supercritical water pretreatment method for analysis of strontium and uranium in soil (Andosols)",

abstract = "Hydrothermal pretreatment of soils (Andosols) from Ibaraki prefecture (Japan) was used to improve methods for monitoring radioactive Sr and U. Calcined samples were pretreated with subcritical or supercritical water (SCW) followed by extraction with 0.5 M HNO3 solutions. With SCW pretreatment, recoveries of Sr and U were 70% and 40%, respectively. Experimental recoveries obtained can be described by a linear relationship in water density. The proposed method is robust and can lower environmental burden of routine analytical protocols.",

keywords = "Analytical methods, Hydrothermal pretreatment, Soil monitoring, Strontium, Uranium",

author = "Mika Nagaoka and Hiroki Fujita and Aida, {Taku Michael} and Haixin Guo and Smith, {Richard Lee}",

note = "Funding Information: We would like to thank discussion and measurement of TC, TN and TOC with Jun Koarashi (JAEA). This work was supported by JSPS KAKENHI Grant Number 15K18323 .",

year = "2021",

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doi = "10.1016/j.apradiso.2020.109465",

language = "English",

volume = "168",

journal = "Applied Radiation and Isotopes",

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TY - JOUR

T1 - Supercritical water pretreatment method for analysis of strontium and uranium in soil (Andosols)

AU - Nagaoka, Mika

AU - Fujita, Hiroki

AU - Aida, Taku Michael

AU - Guo, Haixin

AU - Smith, Richard Lee

N1 - Funding Information: We would like to thank discussion and measurement of TC, TN and TOC with Jun Koarashi (JAEA). This work was supported by JSPS KAKENHI Grant Number 15K18323 .

PY - 2021/2

Y1 - 2021/2

N2 - Hydrothermal pretreatment of soils (Andosols) from Ibaraki prefecture (Japan) was used to improve methods for monitoring radioactive Sr and U. Calcined samples were pretreated with subcritical or supercritical water (SCW) followed by extraction with 0.5 M HNO3 solutions. With SCW pretreatment, recoveries of Sr and U were 70% and 40%, respectively. Experimental recoveries obtained can be described by a linear relationship in water density. The proposed method is robust and can lower environmental burden of routine analytical protocols.

AB - Hydrothermal pretreatment of soils (Andosols) from Ibaraki prefecture (Japan) was used to improve methods for monitoring radioactive Sr and U. Calcined samples were pretreated with subcritical or supercritical water (SCW) followed by extraction with 0.5 M HNO3 solutions. With SCW pretreatment, recoveries of Sr and U were 70% and 40%, respectively. Experimental recoveries obtained can be described by a linear relationship in water density. The proposed method is robust and can lower environmental burden of routine analytical protocols.

KW - Analytical methods

KW - Hydrothermal pretreatment

KW - Soil monitoring

KW - Strontium

KW - Uranium

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