Speaker
Description
Accurate quantification of naturally occurring radionuclides such as thorium (Th), potassium (K) and uranium (U) is essential for environmental monitoring, mineral exploration and radiological assessment. This study focuses on the optimisation of radionuclide measurement by comparing in situ gamma spectrometry data with laboratory-based inductively coupled plasma mass spectrometry (ICP-MS) results. Field measurements were conducted using a Medusa gamma-ray spectrometer, complemented by drone-based surveys to enhance spatial coverage and accessibility across the study area.
The radiometric data obtained from ground and aerial platforms were processed and calibrated to derive elemental concentrations, which will then systematically compared with ICP-MS analyses of collected samples. Statistical and spatial analyses will be applied to evaluate the level of agreement, identify discrepancies and assess factors influencing measurement variability, including soil heterogeneity, moisture content and instrument sensitivity.
The results are expected to demonstrate the strengths and limitations of each method, highlight the efficiency of field-based techniques for rapid, large-scale assessments, and confirm the higher precision and accuracy of ICP-MS under controlled laboratory conditions. The integration of drone-assisted surveys further will improve data resolution and coverage, offering a valuable tool for terrains that are difficult to access.
This study contributes to the development of an optimised framework for radionuclide assessment in South Africa, supporting more reliable environmental monitoring and resource evaluation through the combined use of field and laboratory methodologies.
| Apply for student award at which level: | None |
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| Consent on use of personal information: Abstract Submission | Yes, I ACCEPT |