Spatial and In-Depth Analysis of Soil Radioactivity Based on the Visualization and Interpretation of Laboratory Data from Borehole Gamma-Ray Surveys and Radiochemical Methods
Idrisheva Z. Uvaliyeva I. Khassenova Z. Amenova F. Toktaganov T. Daumova G.
September 2025Engineered Science Publisher
ES Energy and Environment
2025#29
One of the effective approaches to assessing the state of contaminated areas is to build a radioactive soil profile reflecting the vertical distribution of radionuclide activity. The analysis of such profiles helps to determine the depth of radionuclide penetration, migration intensity and accumulation zones, which is the basis for forecasting environmental risks, planning mitigation measures and making decisions on remediation. This study examines the vertical and spatial distribution of natural radioactivity in the urban soils of Oskemen, East Kazakhstan, an area historically affected by industrial pollution. A total of 140 soil samples were analyzed using borehole gamma studies (0-100 cm, 10 cm intervals) and laboratory radiochemical methods, including alpha spectrometry and gamma spectrometric measurements of radium-226 (Ra-226), and thorium-232 (Th-232). The results of the study indicate a significant decrease in the number of radionuclides with depth: the average cost is 4900 Bq/kg at a depth of 0-25 cm to 1300 Bq/kg at a depth of 75-100 cm, Ra-226 decreased from 85 to 24 Bq/kg, Th-232-from 460 to 126 Bq/kg. Strong correlations between the layers indicate a natural geochemical distribution, while localized alpha anomalies indicate a possible anthropogenic impact. These data provide important insights into pollution stratification and help make informed decisions on risk assessment and soil remediation.
Alpha activity , Borehole gamma-ray survey , Laboratory studies , Natural radioactivity , Ra-226 , Soil contamination , Th-232
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D. Serikbaev East Kazakhstan Technical University, 19 D. Serikbayev str, Oskemen, 070004, Kazakhstan
S. Amanzholov East Kazakhstan University, 34 30th Guards Division str, Oskemen, 070002, Kazakhstan
D. Serikbaev East Kazakhstan Technical University
S. Amanzholov East Kazakhstan University
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