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Environmental Pollution
Volume 301, 2022, 119000

Multifractal features of activity concentration and stochastic risk assessment of naturally occurring and technogenic radionuclides in the soil of Yerevan, Armenia?

Antonio Arutaa, Lilit Sahakyanb, Gevorg Tepanosyanb, Nona Movsisyanb, Olga Belyaevab, Stefano Albanesea

Department of Earth, Environment and Resources Sciences, University of Naples Federico II, Via Cintia 21, 80126, Naples, Italy.

Abstract

Spatial patterns and background ranges of naturally occurring radionuclides (NORs) (i.e. U-238, Th-232, K-40) and Cs-137 were studied in the urban soils of Yerevan, the capital city of Armenia. Multifractal Inverse Distance Weighting (MIDW) was used to generate and analyze distribution patterns of radionuclide activities. Based on Fourier transformation of radioactivity data, a spectral analysis was also applied to separate, where possible, background/baseline patterns from local anomalies: two ranges of background values were found to characterise the Yerevan territory.

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