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Investigating the soil surface properties behind elevated natural radiation in Mamuju, Indonesia

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Veröffentlicht in:Scientific Reports (Nature Publisher Group) vol. 15, no. 1 (2025), p. 38287-38303
1. Verfasser: Abdullah, Adi Rahmansyah Amir
Weitere Verfasser: Permana, Sidik, Srigutomo, Wahyu, Maulana, Alan, Irwanto, Dwi, Seno, Haryo, Purnama, Dikdik Sidik, Wafda, Hakimul, Wulandari, Cici, Wahyudi, Wahyudi, Farid, Muhammad Muhyidin, Rosianna, Ilsa, Humolungo, Ismail, Zulfahmi, Zulfahmi, Nugraha, Eka Djatnika
Veröffentlicht:
Nature Publishing Group
Schlagworte:
Department of Agriculture
Iran
Brazil
Sulawesi
Indonesia
India
China
Spectrometry
Environmental monitoring
Background radiation
Germanium
Chemical elements
Radioisotopes
Tropical environments
Aluminum
Uranium
Risk assessment
Radioactive materials
Acidic soils
Radiation
Geology
Weathering
Surface properties
Thorium
Geochemistry
Soil surfaces
Environmental
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Abstract:Mamuju Regency, Indonesia, is among the world’s notable high natural background radiation areas (HBNRAs). This study examines the environmental and geochemical processes responsible for the accumulation of uranium (U), thorium (Th), and potassium (K) in surface soils. Through systematic field sampling, geochemical characterization, and radiological measurements, we found that the distribution of radionuclides is primarily governed by weathering intensity and lateritization. High U and Th concentrations occur in clay-rich, acidic soils, whereas K is enriched in less weathered profiles. High Purity Germanium (HPGe) gamma spectrometry confirmed elevated of ²²⁶Ra, ²³²Th, and ⁴⁰K activity, while survey meter measurements of ambient gamma dose rates exceeded global averages. Multivariate analyses (PCA and HCA) revealed strong correlations between radiological parameters and geochemical indicators, confirming that weathering and lateritization are the dominant factors. These findings advance the understanding of Naturally Occurring Radioactive Material (NORM) behavior in tropical soils and provide essential data for radiological risk assessment and environmental monitoring in HBNRAs.
ISSN:2045-2322
DOI:10.1038/s41598-025-21431-6
Quelle:Science Database