Faculty of Energy and Fuels, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059, Krakow, Poland.
Faculty of Natural Sciences, Matej Bel University, Tajovskeho 40, 97401, Banská Bystrica, Slovakia.
Environ Sci Pollut Res Int. 2019 Mar;26(7):7115-7122. doi: 10.1007/s11356-019-04136-y. Epub 2019 Jan 16.
The analyzed sediments were taken from the man-made reservoirs (Velka Richnava, Rozgrund and Vindsachta) located in an area intensively mined for polymetallic ores since the end of the eleventh century (Banska Stiavnica region, Central Europe). The aims of this study were to determine the radioactivity of natural (Ra, Th, Pb) and artificial (Cs and Am) radionuclides, compare the radionuclides' distribution, and indicate the correlation of radioisotopes and their origin related to sediment properties. Two analytical techniques were used. Th, Ra, Am, and Cs were measured by means of gamma spectrometry and Pb was determined by its daughter radionuclide Po using alpha spectrometry. The results showed that the highest mean level of Ra (42.6 Bq·kg), Th (49.7 Bq·kg) and Pb (75.2 Bq·kg) was in the sediments collected from Rozgrund. The radioactivity of Cs and Am were present at a higher level in the layer related to Chernobyl (1986) accident and nuclear weapon test (1950/1960). The distribution of natural radionuclides was quite similar in all reservoirs. Chemometric analysis confirmed the radionuclides' origin and correlation between the analyzed parameters.
分析的沉积物取自人造水库（大里查纳瓦、罗兹格朗德和温德萨赫塔），这些水库位于自 11 世纪末以来（中欧班斯卡-比斯特里察地区）多金属矿开采密集的地区。本研究的目的是确定天然（镭、钍、铅）和人工（铯和锔）放射性核素的放射性，比较放射性核素的分布，并指出与沉积物特性有关的放射性同位素及其来源的相关性。使用了两种分析技术。通过伽马能谱法测量了 Th、Ra、Am 和 Cs，通过其子核 Po 的α能谱法测定了 Pb。结果表明，在罗兹格朗德水库采集的沉积物中，Ra（42.6 Bq·kg）、Th（49.7 Bq·kg）和 Pb（75.2 Bq·kg）的平均含量最高。Cs 和 Am 的放射性在与切尔诺贝利（1986 年）事故和核试验（1950/1960 年）相关的层中含量更高。所有水库中天然放射性核素的分布都非常相似。化学计量分析证实了放射性核素的来源以及分析参数之间的相关性。
