Abstract
The activity concentrations of 238U, 232Th and 40K in sediments samples from Tuomo river in Burutu, Delta State, Nigeria have been determined using gamma spectrometry NaI(TI) detector. The concentrations of 238U, 232Th and 40K in the sediments range from 18.69±1.88−77.99±4.35 Bqkg−1, 59.67 ± 11.85 −149.03 ±23.97 Bqkg−1 and 580.19±3.89−873.04±4.86 Bqkg−1 respectively. The mean values were found to be above their respective world average values. Radiological risk assessments were carried out to ascertain the possible radiological effects associated with the use of the sediments. The results for the radiological hazard parameters revealed that the sediments are in tandem with recommended safe limits. Therefore, the use of Tuomo river sediment for purpose of building and other human needs is generally of negligible radiological concern for human health.Keywords: Natural radionuclides; Activity concentration; Radiological hazards; Sediments
Highlights
Delta State, Nigeria have been determined using gamma spectrometry NaI(TI) detector
Activity utilization index (AUI): In order to facilitate the calculation of dose rates in air from different combinations of the three radionuclides in sediments, an activity utilization index was constructed and it is given by the following equation (Sivakumar et al, 2014; Ravisankar et al, 2014; Isinkaye and Emelue, 2015)
The results showed that these natural radionuclides were present in all the samples at varying amount
Summary
Delta State, Nigeria have been determined using gamma spectrometry NaI(TI) detector. The concentrations of 238U, 232Th and 40K in the sediments range from 18.69±1.88−77.99±4.35 Bqkg−1, 59.67±11.85−149.03±23.97 Bqkg−1 and 580.19±3.89−873.04±4.86 Bqkg−1 respectively. Activity utilization index (AUI): In order to facilitate the calculation of dose rates in air from different combinations of the three radionuclides in sediments, an activity utilization index was constructed and it is given by the following equation (Sivakumar et al, 2014; Ravisankar et al, 2014; Isinkaye and Emelue, 2015)
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