Natural activities of 40K, 238U and 232Th in elephant grass (Pennisetum purpureum) in Ibadan metropolis, Nigeria

• Published in: Journal of environmental radioactivity Vol. 78; no. 1; pp. 105 - 111
• Main Authors: Jibiri, N.N., Ajao, A.O.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 2005; Elsevier
• Subjects: Abattoir; Animal, plant and microbial ecology; Applied ecology; Beef; Biological and medical sciences; Biological effects of radiation; Cattle; Ecotoxicology, biological effects of pollution; Effective dose; Effects of pollution and side effects of pesticides on plants and fungi; Elephant grass; Environmental Monitoring; Fundamental and applied biological sciences. Psychology; Ingestion; Nigeria; Pennisetum - metabolism; Potassium Radioisotopes - analysis; Radioactivity; Radiocontamination; Spectrometry, Gamma; Thorium - analysis; Tissues, organs and organisms biophysics; Uranium - analysis; Nigeria; Africa; Elephant grass; Cattle; Abattoir; Beef; Effective dose; Nigeria; Radioactivity; Ingestion; Monocotyledones; Radioactive pollution; Radioactive contamination; Radioisotope; Radioecology; Trophic chain; Gramineae; Angiospermae; Geogenic factor; Ingestion: Cattle; Dosimetry; Human; Natural origin pollution; Potassium 40; Pennisetum purpureum; Thorium 232; Radioactivity measurement; Uranium 238; Spermatophyta; Gamma spectrometry
• ISSN: 0265-931X; 1879-1700
• DOI: 10.1016/j.jenvrad.2004.02.007

Samples of elephant grass collected at some pasturing farmlands across different locations in Ibadan metropolis were analyzed for their natural radioactivity concentrations due to 40K, 238U and 232Th radionuclides. Radioactivity measurements were carried out using γ-ray spectroscopy. The average radioactivity concentration of 40K was found to be 64.5±8.1Bqkg−1,25.7±5.5Bqkg−1 for 238U and 33.4±3.9Bqkg−1 for 232Th. The radiological health implication to the population that may result from these values is found to be very low and almost insignificant. No artificial radionuclide, however, was detected in any of the samples, hence, measurements have been taken as representing baseline values of these radionuclides in the grass in the metropolis.