摘要:
To provide an absorbing material to separate tritium from heavy water. By using a deuterium ion- or hydrogen ion-containing manganese oxide having a spinel-type crystal structure as a tritium absorbing material collecting tritium from heavy water containing tritium, tritium can be separated and recovered inexpensively from the heavy water.
摘要:
A process for selectively separating a metallic constituent from other metals and other materials accompanying the metallic constituent in a mixture is described. The process comprises the step of providing the mixture in an aqueous solution such that the metallic constituent forms a complex anion in the solution. One or more of the other metals forms a cation or a complex cation in the solution. Another step includes contacting the solution with one or more additives to form layered double hydroxide (LDH) material in situ such that the complex anion is intercalated within interlayers of the LDH material and wherein one or more of the other metals are incorporated into the LDH material's crystal structure or matrix. Another step involves the addition of an LDH to an aqueous solution. The process involves selectively recovering the metallic constituent from the interlayer of the LDH by subjecting the LDH to a recovery treatment step(s) and as required, methods to modify the LDH to facilitate metal separation and recovery or contaminant stabilisation.
摘要:
Chromatography columns for the purification of eluates from 68Ge/68Ga generators comprising silica as stationary phase and purification processes that use said columns are described.
摘要:
Disclosed herein are systems, methods, processes, and apparatuses for treating radioactive waste, through systems designed to bind and dry radioactive media and to mechanical devices and techniques that are utilized for removal of granular media from confined spaces (vessels and tanks), in some of its various embodiments, the system processes spent ion exchange media for long-term storage.
摘要:
Die Erfindung bezieht sich auf den Aufbau von Bauwerken, wie KKW-Gebäude, die unter Einsatz von monolithischen Bausteinen oder Platten aus Beton oder Stahlbeton errichtet werden. Der Baustein oder die Platte enthalten einen ausbetonierten Behälter mit Komponenten zur Sorptionsentziehung von Radionukliden oder toxischen Stoffen aus dem Wasser. Der Behälter hat Elemente, um das verunreinigte Wasser zuzuführen und das gereinigte Wasser abzuleiten. Das Bauverfahren umfasst den Aufbau von Bauwerken aus genannten Bausteinen oder Platten. Das Verfahren zur Fertigung des Bausteins oder der Platte umfasst die Formung eines Betonkörpers, in dem mindestens ein Behälter mit Komponenten zur Wasserreinigung ausbetoniert ist, wobei der Behälter Stutzen oder Flansche aufweist, um das verunreinigte Wasser zuzuführen und das gereinigte Wasser abzuleiten. Die Arbeitssicherheit während der Errichtung der Bauwerke wird sichergestellt, und eine eventuelle Verbreitung der Radionuklide außerhalb der Grenzen des Bauwerkes wird verhindert.
摘要:
The invention provides an industrially advantageous method for producing a crystalline silicotitanate having high adsorption/removal capabilities for cesium and strontium in seawater. The method includes a first step of mixing a silicic acid source, a sodium compound, titanium tetrachloride, and water to prepare a mixed gel and a second step of hydrothermal reaction of the mixed gel prepared in the first step to produce crystalline silicotitanate of formula: Na 4 Ti 4 Si 3 O 16 ·nH 2 O (wherein n represents 0 to 8). In the first step, the silicic acid source, sodium compound, and titanium tetrachloride are mixed in such a mixing ratio that the resulting mixed gel may have a Ti to Si molar ratio, Ti/Si, of 1.2 to 1.5 and an Na 2 O to SiO 2 molar ratio, Na 2 O/SiO 2 , of 0.7 to 2.5.
摘要翻译:本发明提供了一种工业上有利的用于生产对海水中的铯和锶具有高吸附/去除能力的结晶硅钛酸盐的方法。 该方法包括:第一步,将硅酸源,钠化合物,四氯化钛和水混合以制备混合凝胶;以及第二步水热反应第一步中制备的混合凝胶,以产生下式的结晶硅钛酸盐: Na 4 Ti 4 Si 3 O 16·nH 2 O(其中n表示0至8)。 在第一步中,将硅酸源,钠化合物和四氯化钛以这样的混合比混合,使得所得到的混合凝胶可以具有1.2至1.5的Ti与Si摩尔比,Ti / Si和Na 2 O至SiO 2 摩尔比Na 2 O / SiO 2为0.7〜2.5。
摘要:
Provided is a tritium adsorbent. Use of hydrogen- or lithium-containing manganese oxide having a spinel crystal structure as a tritium adsorbent to trap tritium from tritium-containing water makes it possible to inexpensively separate tritium from water.