Olszewski Grzegorz, Boryło Alicja, Skwarzec Bogdan
Laboratory of Analytical and Environmental Radiochemistry, Department of Environmental Chemistry and Radiochemistry, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland.
Laboratory of Analytical and Environmental Radiochemistry, Department of Environmental Chemistry and Radiochemistry, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland.
J Environ Radioact. 2015 Aug;146:56-66. doi: 10.1016/j.jenvrad.2015.04.001. Epub 2015 Apr 24.
The aim of this work was to determine the uranium concentration ((234)U, (235)U and (238)U) and values of the activity ratio (234)U/(238)U in soil samples collected near phosphogypsum waste heap in Wiślinka (northern Poland). On the basis of the studies it was found that the values of the (234)U/(238)U activity ratio in the analyzed soils collected in the vicinity of phosphogypsum dump in Wiślinka are in most cases close to one and indicate the phosphogypsum origin of the analyzed nuclides. The obtained results of uranium concentrations are however much lower than in previous years before closing of the phosphogypsum stockpile. After this process and covering the phosphogypsum stockpile in Wiślinka with sewage sludge, phosphogypsum particles are successfully immobilized. In the light of the results the use of phosphate fertilizers seems to be a major problem. Prolonged and heavy rains can cause leaching accumulated uranium isotopes in the phosphogypsum stockpile, which will be washed into the Martwa Wisła and on the fields in the immediate vicinity of this storage.
这项工作的目的是测定在波兰北部维希林卡磷石膏废料堆附近采集的土壤样品中的铀浓度（（234）U、（235）U和（238）U）以及活度比（234）U/（238）U的值。基于这些研究发现，维希林卡磷石膏堆场附近采集的分析土壤中（234）U/（238）U活度比的值在大多数情况下接近1，表明所分析的核素源自磷石膏。然而，所获得的铀浓度结果远低于磷石膏堆关闭前的前几年。在此过程之后，用污水污泥覆盖维希林卡的磷石膏堆，磷石膏颗粒成功地被固定。根据这些结果，磷肥的使用似乎是一个主要问题。长期暴雨会导致磷石膏堆中积累的铀同位素被淋溶，这些铀同位素将被冲入马特瓦维斯拉河以及该储存设施附近的田地。
