The nature of the volatile technetium species formed during vitrification of borosilicate glass

被引：32

作者：

Childs, Bradley C. ^{[1
]}

Poineau, Frederic ^{[1
]}

Czerwinski, Kenneth R. ^{[1
]}

Sattelberger, Alfred P. ^{[1
,2
]}

机构：

[1] Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA

[2] Argonne Natl Lab, Energy Engn & Syst Anal Directorate, Lemont, IL 60439 USA

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2015年 / 306卷 / 02期

关键词：

Technetium; Volatile; Red; Vitrification; X-ray absorbance spectroscopy; RAY-ABSORPTION SPECTROSCOPY; FINE-STRUCTURE; WASTE GLASS; RHENIUM; OXIDE;

D O I：

10.1007/s10967-015-4203-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Vitrification of sodium pertechnetate into borosilicate glass was performed in air at 1100 degrees C. A glass with a composition similar to the one developed for vitrification of the low activity waste at the Hanford site was used. A red volatile species was observed above 600 degrees C. The extended X-ray absorption fine structure results indicate the environment of the absorbing Tc atom consists of 2.9(6) O atoms at 1.73(2) angstrom, 2.2(4) O atoms at 2.02(2) angstrom, and 0.8(2) O atoms at 2.18(2) angstrom. The results are consistent with the presence of a mononuclear species with a structure closely related to TcO3(OH)(H2O)(2).

引用

页码：417 / 421

页数：5

共 18 条

[1] DIRHENIUM DIHYDRATOHEPTOXIDE RE2O7(OH2)2 - NEWTYPE OF WATER BONDING IN AN AQUOXIDE[1] [J].