Assessment of Cs-137 and Pu-239,Pu-240 Distribution in Forest Soils of the Opole Anomaly

作者：Ziembik Zbigniew^*; Dolhanczuk Srodka Agnieszka; Komosa Andrzej; Orzel Jolanta; Waclawek Maria

来源：Water, Air, and Soil Pollution, 2010, 206(1-4): 307-320.

DOI：10.1007/s11270-009-0107-8

• Cs-137
• Pu-239,Pu-240
• Forest soil
• Robust linear regression

Distribution of Cs-137 and Pu-239,Pu-240 in the forest soils horizons of the Opole Anomaly was established. Gamma and alpha spectrometry was used for determination of these isotopes. It was found that the Cs-137 activity was approx. 1,000 times higher than that of Pu-239,Pu-240. The highest activities of both radioisotopes were found close to the boundary region in soil profile where the organic horizon turns into the inorganic one. Cluster analysis did not clearly indicate the group's existence in data in respect to Cs-137 and Pu-239,Pu-240 activities and organic matter content. Distributions of Cs-137 and Pu-239,Pu-240 in soil horizons were non-normal but similar to each other. These distributions were substantially different from that one for organic matter content. The data were separated into two groups, for organic and inorganic soil horizons, respectively. Data transformation using Box-Cox formula was performed following by standardization. Mutual relationships between variables were investigated using ordinary and robust regression methods. Good correlation between Cs-137 and Pu-239,Pu-240 was found. No significant relationship between organic matter content and radioisotopes activity was asserted.

• 出版日期2010-2