CAJ | 학술논문

为研究钚材料分散沉降颗粒物中Pu和 Am 在中性水中的溶解和分散行为,进行了钚材料分散沉降颗粒物在去离子水中的振荡浸取实验,并对振荡浸取后的水相样品进行自然沉降、离心、过滤和超滤等手段分级处理,采用同位素稀释法对样品中Pu和 Am的含量进行了定量分析。在振荡浸取过程中,水相中 Pu 和 Am含量开始快速增长,随后逐步达到平衡,但Pu含量前期的变化速率比 Am快。Pu和 Am在水相中以溶解态(含小粒径胶体聚合物)稳定存在的质量分数分别约为5×10-9~1×10-8和2×10-13。结果表明,在水相中Pu大部分以溶解态(含小粒径胶体聚合态)存在,Am主要以沉降颗粒物上的吸附或包裹态为主。
위연구비재료분산침강과립물중Pu화 Am 재중성수중적용해화분산행위,진행료비재료분산침강과립물재거리자수중적진탕침취실험,병대진탕침취후적수상양품진행자연침강、리심、과려화초려등수단분급처리,채용동위소희석법대양품중Pu화 Am적함량진행료정량분석。재진탕침취과정중,수상중 Pu 화 Am함량개시쾌속증장,수후축보체도평형,단Pu함량전기적변화속솔비 Am쾌。Pu화 Am재수상중이용해태(함소립경효체취합물)은정존재적질량분수분별약위5×10-9~1×10-8화2×10-13。결과표명,재수상중Pu대부분이용해태(함소립경효체취합태)존재,Am주요이침강과립물상적흡부혹포과태위주。
In order to investigate the distribution of Pu and Am in settling particles from dis-persed plutonium material in de-ionized water,settling particles from dispersed plutonium material were leached through shaking in de-ionized water,then the aqueous phase was clas-sified by four methods.The contents of Pu and Am in the aqueous phase were determined using isotope-dilution analysis.The contents of Pu and Am in the aqueous phase rise quickly at the beginning of leaching,and then turn to be stable gradually.However,the rising rate of Pu content is faster than Am.The mass fraction of Pu and Am in the solution (including small colloid particles)are about 5×10-9-1×10-8 and 2×10-13,respectively.Our results demonstrate that most of Pu is soluble state (including small colloid particles)in the aqueous phase, while most of Am is attached to the settling particles or contained in the settling particles.