低价态鍀络合物的合成及其对高放废物中鍀的分离行为的影响

高放废物的安全处置是核能的可持续发展的前提，高放废物中危害环境的关键核素是长半衰期的锕系，镧系以及裂片元素锶，铯及鍀等，其中Tc-99由于半衰期长，在环境中易于迁移，因此它的治理就特别重要。当前治理鍀的一个思路是将TcO4-变成低价态，从而从废物中分离出来，而低价态鍀的种态对鍀的分离行为有重要影响。为此该课题研究低价态鍀络合物的合成及其对鍀的分离行为的影响，拟从以下几方面展开：（1）模拟高放废液的条件下合成低价态的鍀的络合物并进行表征；（2）研究各类低价态鍀的络合物的性能，并总结结构和性能之间的关系；（3）研究各类低价态鍀的络合物对鍀的分离行为的影响。通过上述研究，完善鍀的低价态络合物的数据库，搭建低价态鍀的络合物结构和性能以及对鍀的分离行为的关系，为高放废物的处理工艺奠定基础，也为放射性废物的安全处置提供一种新的思路。

The safety management of hgh activity waste is important on the continuous development of nuclear energy. The hazardous element in high activity waste is actinicles,lanthanide element,strontium,cesium,and technetium. Among them, the remediation of Tc-99 is the important element due to its long live time and removable in the environment.The speciation of technetium in High activity waste is one of important factor infuencing the separation behavoir of technetium.For this,the synthesis of low valence technetium complex and its effect on the separation behavior of technetium in high activity waste will be studied from the following aspect:(1) the synthesis of low valence technetium and its characteration; (2)the study of the performance of all sorts of low valence technetium complex;(3) the influence of all sorts of low valence technetium complex on the separation behavoir of technetium. This researches will provide better data for the technetium complex and a new strategy for the remediation of the high activity waste