Assessment of natural radioactivity, radon gas and soil characteristics along the Volta Lake in the Kpando municipality of Volta region, Ghana.

Abstract

Assessment of radionuclides, indoor radon (222RnI), radon exhalation (222Rnex), and soil characteristics in the coastal part of Kpando has been studied using HPGe, CR-39 and sieving techniques. Statistical analysis between radionuclides, radon levels and soil characteristics was done using Pearson's correlation. The mean radionuclide concentration, radon levels and soil characteristics were obtained as 226Ra (23.1±1.4Bq per kg), 232Th (34.6±2.9Bq per kg), 40K (187.1±13.7Bq per kg), 222RnI (64.70±2.7Bq per m3), 222Rnex (7.9±0.5 μBq per m2h), sandy (45.9±3.9%), silt (40.7±3.1%), clay (13.5±0.8%), porosity (0.6±0.1) and moisture (7.6±0.8%). Radiological effects estimated were within recommended limits. The maximum positive and negative coefficients exist between 222Ra/222Rnex (1.0) and 222Rnex/MC (-0.9), respectively. Radon exhalation correlates better with soil characteristics. The statistical analysis indicated that soil characteristics have significant effects on radionuclides and radon levels in soils and dwellings.