Ziembik Zbigniew
Independent Chair of Biotechnology and Molecular Biology, Opole University, ul. kard. B. Kominka 6, 45-032 Opole, Poland.
J Radioanal Nucl Chem. 2014;299(1):599-609. doi: 10.1007/s10967-013-2828-9. Epub 2013 Nov 14.
The measurements results of Cs activity concentrations in forest soil profiles are discussed. In studies some simplifications were considered. First of them concerns disregarding of soil subtype in data analysis. However initially this parameter was considered in data analysis, it was finally ignored. The second assumption drops information about specific soil horizon. Description of Cs accumulation is based on relationships between its relative activity concentrations in soil layers. The model formulation was based on the results of exploratory data analysis of the relative Cs activity concentrations. In studies the methods designed for compositional data analysis were used. The results of analysis showed that the relationships between the relative activity concentrations of Cs in soil layers, due to their nature, might be divided into two groups. The first of them concerns layers located close to soil surface. The relative activity concentrations of Cs in these layers are proportional to each other, and distribution mechanism of cesium within them has the characteristics of the process leading to thermodynamic equilibrium. The second group is related to layers that are located deeper. The calculation results suggest lack of thermodynamic equilibrium between these layers and layers situated above. Utilization of a linear model for description of changes in relative activity concentrations of Cs in deeper layers supposes that these changes occur much slower than in layers lying above.
讨论了森林土壤剖面中铯活度浓度的测量结果。在研究中考虑了一些简化情况。首先是在数据分析中忽略土壤亚类。然而，最初在数据分析中考虑了这个参数，但最终还是被忽略了。第二个假设舍弃了有关特定土壤层位的信息。铯积累的描述基于其在土壤层中相对活度浓度之间的关系。模型公式基于铯相对活度浓度的探索性数据分析结果。在研究中使用了为成分数据分析设计的方法。分析结果表明，由于土壤层中铯相对活度浓度之间关系的性质，可将其分为两组。第一组涉及靠近土壤表层的土层。这些土层中铯的相对活度浓度相互成比例，铯在其中的分布机制具有导致热力学平衡过程的特征。第二组与更深层的土层有关。计算结果表明，这些深层与上层之间缺乏热力学平衡。使用线性模型描述深层铯相对活度浓度的变化意味着这些变化比上层的变化要慢得多。
