Bismuth-embedded SBA-15 mesoporous silica for radioactive iodine capture and stable storage

被引:102
作者
Yang, Jae Hwan [1 ]
Cho, Yong-Jun [1 ]
Shin, Jin Myeong [1 ]
Yim, Man-Sung [2 ]
机构
[1] Korea Atom Energy Res Inst, Nucl Fuel Cycle Proc Dev Div, Taejon 305353, South Korea
[2] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Taejon 305701, South Korea
关键词
lodine-129; Bismuth-embedded SBA-15; Chemisorption; Post-sorption process; Efficient capture and stabilization; CHALCOGEN-BASED AEROGELS; SELECTIVE ADSORPTION; SORBENTS; GLASSES; AREA;
D O I
10.1016/j.jnucmat.2015.06.043
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Efficient capture and stable storage of the long-lived iodine-129 (I-129), released as off-gas from nuclear fuel reprocessing, have been of significant concern in the waste management field. In this study, bismuth-embedded SBA-15 mesoporous silica was firstly applied for iodine capture and storage. SBA-15 was functionalized with thiol (-SH) groups, followed by bismuth adsorption with Bi-S bonding, which was thermally treated to form Bi2S3 within SBA-15. The bismuth-embedded SBA-15s demonstrated high iodine loading capacities (up to 540 mg-l/g-sorbent), which benefitted from high surface area and porosity of SBA-15 as well as the formation of thermodynamically stable BiI3 compound. Iodine physisorption was effectively suppressed due to the large pores present in SBA-15, resulting in chemisorption as a main mechanism for iodine confinement. Furthermore, a chemically durable iodine-bearing material was made with a facile post-sorption process, during which the iodine-incorporated phase was changed from BiI3 to chemically durable Bi5O7I. Thus, our results showed that both efficient capture and stabilization of 1291 would be possible with the bismuth-embedded SBA-15, in contrast to other sorbents mainly focused on iodine capture. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:556 / 564
页数:9
相关论文
共 56 条
  • [21] The durability of iodide sodalite
    Maddrell, Ewan
    Gandy, Amy
    Stennett, Martin
    [J]. JOURNAL OF NUCLEAR MATERIALS, 2014, 449 (1-3) : 168 - 172
  • [22] Direct syntheses of ordered SBA-15 mesoporous silica containing sulfonic acid groups
    Margolese, D
    Melero, JA
    Christiansen, SC
    Chmelka, BF
    Stucky, GD
    [J]. CHEMISTRY OF MATERIALS, 2000, 12 (08) : 2448 - 2459
  • [23] Matyás J, 2011, CERAM ENG SCI PROC, V32, P23
  • [24] Direct syntheses of ordered SBA-15 mesoporous materials containing arenesulfonic acid groups
    Melero, JA
    Stucky, GD
    van Grieken, R
    Morales, G
    [J]. JOURNAL OF MATERIALS CHEMISTRY, 2002, 12 (06) : 1664 - 1670
  • [25] Advances in the synthesis and catalytic applications of organosulfonic-functionalized mesostructured materials
    Melero, Juan A.
    van Grieken, Rafael
    Morales, Gabriel
    [J]. CHEMICAL REVIEWS, 2006, 106 (09) : 3790 - 3812
  • [26] Nakazawa T., 2001, P MAT RES SOC S, V663, P1
  • [27] Nenoff T., 2008, P MAT RES SOC S, V1043, P2
  • [28] Nenoff T.M., 2012, FCRDSWF2012000172 SA
  • [29] Silver-mordenite for radiologic gas capture from complex streams: Dual catalytic CH3I decomposition and I confinement
    Nenoff, Tina M.
    Rodriguez, Mark A.
    Soelberg, Nick R.
    Chapman, Karena W.
    [J]. MICROPOROUS AND MESOPOROUS MATERIALS, 2014, 200 : 297 - 303
  • [30] Pence D.T., 1973, ICP1022 ID NAT LAB