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Aqueous Dissolution of Silver Iodide and Associated Iodine Release under Reducing Conditions with Sulfide<B>

Published online by Cambridge University Press:  19 October 2011

Yaohiro Inagaki ,
Toshitaka Imamura ,
Kazuya Idemitsu ,
Tatsumi Arima ,
Osamu Kato ,
Hidekazu Asano  and
Tsutomu Nishimura
Yaohiro Inagaki
Affiliation:
inagytne@mbox.nc.kyushu-u.ac.jp, Kyusyu University, Department of Aplied Quantum Physics & Nuclear Engineering, Moto-oka 744, W2-933, Fukuoka, 819-0395, Japan, +81-92-802-3493, +81-92-802-3501
Toshitaka Imamura
Affiliation:
imamura@nucl.kyushu-u.ac.jp, Kyushu University, Fukuoka, 819-0395, Japan
Kazuya Idemitsu
Affiliation:
idemitsu@nucl.kyushu-u.ac.jp, Kyushu University, Fukuoka, 819-0395, Japan
Tatsumi Arima
Affiliation:
arimatne@mbox.nc.kyushu-u.ac.jp, Kyushu University, Fukuoka, 819-0395, Japan
Osamu Kato
Affiliation:
o.kato@engnet.kobelco.co.jp, Kobe Steel Inc., Kobe, 657-0845, Japan
Hidekazu Asano
Affiliation:
h-asano@rwmc.or jp, RWMC, Tokyo, 105-0001, Japan
Tsutomu Nishimura
Affiliation:
t-nishimura@rwmc.or.jp, RWMC, Tokyo, 105-0001, Japan
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Abstract

Aqueous dissolution tests of AgI were performed in Na2S solutions in order to evaluate, empirically, dissolution of AgI to release iodine under reducing conditions with sulfide. The results indicated that AgI dissolves to release iodine being controlled by mainly precipitation of Ag2S. However, the dissolution of AgI can be depressed to proceed, and the thermodynamic equilibrium cannot be attained easily. Solid phase analysis for the reacted AgI suggested that a thin layer of solid silver forming at AgI surface may evolve to be protective against transportation of reactant species, which can lead to the depression in the dissolution of AgI.

Keywords

waste managementIAg
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 985: Symposium NN – Scientific Basis for Nuclear Waste Management XXX , 2006 , 0985-NN12-12
Copyright
Copyright © Materials Research Society 2007

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