Open-pore organic material for retaining radioactive I2 and CH3I

被引:30
作者
Hertzsch, T
Gervais, C
Hulliger, J
Jaeckel, B
Guentay, S
Bruchertseifer, H
Neels, A
机构
[1] Univ Bern, Dept Chem & Biochem, CH-3012 Bern, Switzerland
[2] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
[3] Univ Neuchatel, Inst Chim, CH-2007 Neuchatel, Switzerland
关键词
D O I
10.1002/adfm.200500245
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Application of ultrasound and ball milling produces micrometer-sized crystallites of tris-(o-phenylenedioxy)-cyclotriphosphazene (TPP) that show zeolite-like reversible sorption of I-2 and CH3I (methyl iodide). The thermal stability of open-pore TPP is improved by partial loading with pyrazine. The sorption properties of open-pore TPP are investigated by the I-131 radioactive tracer method. Comparison with activated charcoal (ACC) shows that TPP has a higher sorption efficiency for I-2 dissolved in water than ACC. In the case of a humid gaseous source of CH3I also, TPP exhibits better sorption properties than ACC. Partial loading of open-pore TPP by pyrazine increases its thermal stability by 50 degrees C and the binding properties for retaining CH3I are also improved. Force-field calculations show a difference of Delta E approximate to 20 kJ mol(-1), making the open-pore system less stable than the apohost.
引用
收藏
页码:268 / 272
页数:5
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