Chapter 27
Development of a Rapid Analytical Method
for
129
I in the Contaminated Water and Tree
Samples at the Fukushima Daiichi Nuclear
Power Station
Asako Shimada, Mayumi Ozawa, Yutaka Kameo, Takuyo Yasumatsu,
Koji Nebashi, Takuya Niiyama, Shuhei Seki, Masatoshi Kajio,
and Kuniaki Takahashi
Abstract The separation conditions for iodine species were investigated to analyze
129 I in contaminated water and tree samples generated from the Fukushima Daiichi
Nuclear Power Station (FDNPS). Inorganic iodine species in the samples from
FDNPS were thought to be iodide (I
À ) and iodate (IO 3
À ); therefore, the behaviors of
these species during separation using a solid-phase extraction sorbent, Anion-SR,
for water samples and combustion for tree sample were studied. When the amount
of I was 1 μg and used within a few hours, I
À was extracted with the Anion-SR in
3 M NaOH and diluted HCl (pH 2) solutions, whereas IO 3
À was only slightly
extracted in these solutions. In contrast, 15 ng I
À with a larger amount of IO 3
À (1 μg
I) in the diluted HCl (pH 2) and allowed to stand for 1 day was only slightly
recovered. It is possibly that I
À was changed to another species in a day in this
condition. Iodate was successfully reduced to I
À with NaHSO 3 in the diluted HCl
solution and extracted with the Anion-SR. Consequently, the solution condition
to analyze both I
À and IO 3
À using Anion-SR was observed to be the diluted HCl at
pH 2 with a reductant. For the tree samples, a combustion method was applied and
A. Shimada (*)
Nuclear Cycle Backend Directorate, Japan Atomic Energy Agency,
2-4 Tokai-mura, Naka-gun, Ibaraki, Japan
Fukushima Project Team, Japan Atomic Energy Agency,
2-4 Tokai-mura, Naka-gun, Ibaraki, Japan
e-mail: shimada.asako@jaea.go.jp
M. Ozawa • Y. Kameo • T. Niiyama • S. Seki • M. Kajio
Fukushima Project Team, Japan Atomic Energy Agency,
2-4 Tokai-mura, Naka-gun, Ibaraki, Japan
T. Yasumatsu • K. Nebashi
Tokyo Power Technology Ltd., 5-5-13 Toyosu, Eto-ku, Tokyo, Japan
K. Takahashi
Nuclear Cycle Backend Directorate, Japan Atomic Energy Agency,
2-4 Tokai-mura, Naka-gun, Ibaraki, Japan
© The Author(s) 2015
K. Nakajima (ed.), Nuclear Back-end and Transmutation Technology for Waste
Disposal, DOI 10.1007/978-4-431-55111-9_27
311
Development of a Rapid Analytical Method
for
129
I in the Contaminated Water and Tree
Samples at the Fukushima Daiichi Nuclear
Power Station
Asako Shimada, Mayumi Ozawa, Yutaka Kameo, Takuyo Yasumatsu,
Koji Nebashi, Takuya Niiyama, Shuhei Seki, Masatoshi Kajio,
and Kuniaki Takahashi
Abstract The separation conditions for iodine species were investigated to analyze
129 I in contaminated water and tree samples generated from the Fukushima Daiichi
Nuclear Power Station (FDNPS). Inorganic iodine species in the samples from
FDNPS were thought to be iodide (I
À ) and iodate (IO 3
À ); therefore, the behaviors of
these species during separation using a solid-phase extraction sorbent, Anion-SR,
for water samples and combustion for tree sample were studied. When the amount
of I was 1 μg and used within a few hours, I
À was extracted with the Anion-SR in
3 M NaOH and diluted HCl (pH 2) solutions, whereas IO 3
À was only slightly
extracted in these solutions. In contrast, 15 ng I
À with a larger amount of IO 3
À (1 μg
I) in the diluted HCl (pH 2) and allowed to stand for 1 day was only slightly
recovered. It is possibly that I
À was changed to another species in a day in this
condition. Iodate was successfully reduced to I
À with NaHSO 3 in the diluted HCl
solution and extracted with the Anion-SR. Consequently, the solution condition
to analyze both I
À and IO 3
À using Anion-SR was observed to be the diluted HCl at
pH 2 with a reductant. For the tree samples, a combustion method was applied and
A. Shimada (*)
Nuclear Cycle Backend Directorate, Japan Atomic Energy Agency,
2-4 Tokai-mura, Naka-gun, Ibaraki, Japan
Fukushima Project Team, Japan Atomic Energy Agency,
2-4 Tokai-mura, Naka-gun, Ibaraki, Japan
e-mail: shimada.asako@jaea.go.jp
M. Ozawa • Y. Kameo • T. Niiyama • S. Seki • M. Kajio
Fukushima Project Team, Japan Atomic Energy Agency,
2-4 Tokai-mura, Naka-gun, Ibaraki, Japan
T. Yasumatsu • K. Nebashi
Tokyo Power Technology Ltd., 5-5-13 Toyosu, Eto-ku, Tokyo, Japan
K. Takahashi
Nuclear Cycle Backend Directorate, Japan Atomic Energy Agency,
2-4 Tokai-mura, Naka-gun, Ibaraki, Japan
© The Author(s) 2015
K. Nakajima (ed.), Nuclear Back-end and Transmutation Technology for Waste
Disposal, DOI 10.1007/978-4-431-55111-9_27
311