Occupational exposure to natural radionuclides due to mining activities in Ibadan, Southwestern Nigeria

Ademola, Janet Ayobami; Okpalaonwuka, N. E.

doi:10.1051/radiopro/2009032

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…The net area under the corresponding peaks in the energy spectrum was computed by subtracting counts due to Compton scattering of higher peaks and other background sources from the total area of the peaks [20]. From the net area, the activity concentrations C in the samples were obtained using equation 1 [24][25][26];…”

Section: Activity Measurement and Transfer Factormentioning

confidence: 99%

Soil-to-maize Transfer Factor of Natural Radionuclides in a Tropical Ecosystem of Nigeria

Adesiji¹,

Ademola²

2020

njpap

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Soil-to-plant transfer factor (TF) is a parameter utilized in predicting the accumulation of radionuclides in the plant system. Virgin soil from an uncultivated area and tailings from an abandoned tin mining site were used to formulate three soil groups. Group A (virgin soil only), group B (tailings only) and group C (equal mixture by mass of the virgin soil and tailings). Pot experiments were performed using the soil groups to determine the transfer factors of 40K, 238U and 232Th in maize (Zea mays L.) plants for the tropical ecosystem of Nigeria. The activity concentrations of 40K, 238U and 232Th in the soil groups and the maize plant compartments (seed, stem, leaf and root) were determined using NaI(Tl) gamma-detector. The geometric mean (GM) of the TF values for 40K, 238U and 232Th respectively ranged from 0.02 to 0.27, below detectable limit (BDL) to 0.008 and 0.01 to 0.09 in the in the seeds; 0.04 to 1.74, BDL to BDL and 0.01 to 0.29 in the stems; 0.03 to 0.93, BDL to 0.33 and 0.02 to 0.08 in the leaves and 0.03 to 1.29, 0.05 to 0.38 and 0.08 to 0.41 in the roots.. Potassium-40 had the highest TF values and exhibited the plant accumulation strategy for all the plant compartments. The stem samples had the highest TF for 40K and BDL values for 238U for all the soil groups. Significance differences were observed only in the accumulation of 40K and 232Th across the soil group. Keywords: Radioactivity, potassium, mining, Gamma-ray detectors, calibration

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Section: Activity Measurement and Transfer Factormentioning

confidence: 99%