Measurement of Natural Radioactivity and Evaluation of Radiation Hazards in Soil of Abua/Odual Districts Using Multivariate Statistical Approach (Published)
The activity concentration of 238U, 232Th and 40K in the soil from Abua/Odua districts of Rivers State have been measured using gamma ray spectrometry. Radiological health parameters were estimated from the activity concentration of these radionuclides in order to assess health implication of exposure of the general public to the studied soil. The average value of 238U, 232Th and 40K measured are 67.40, 507.19 and 8217.77 Bqkg-1respectively. The calculated radium equivalent (Raeq), absorbed dose (D), annual effective dose equivalent (AEDE), activity utilization index (RLI),internal and external hazard indices (Hin, Hex), excess lifetime cancer risk (ELCR), and annual gonald dose (AGED) were used to access the health implication of exposure to the soil studied. The results were higher than the recommended safe and criterion limits given by UNSCEAR. The statistical method was used to study the relationship between the radionuclides and also the calculated radiation parameters. The results of this study revealed an area of high gamma emitting radionuclides which could lead to significant health hazard to the exposed populace. The result will also serve as a baseline radiometric data for future studies in the area and radiological mapping of the area
DETERMINATION FOR LEVELS OF RADIONUCLIDES OF URANIUM, THORIUM AND POTASSIUM IN WATER, SEDIMENTS AND ALGAE SAMPLES FROM SELECTED COASTAL AREAS OF LAGOS, NIGERIA; USING ENERGY DISPERSIVE X-RAY FLOURESCENCE (Published)
Concentration of some natural radionuclides were determined in water, sediments and green algae collected from selected coastal areas of Lagos, Nigeria over a period of two seasons (wet and dry) using Energy Dispersive X-ray Fluorescence (ED-XRF) techniques. This was done to highlight and ascertain possible radionuclide pollution. Using the ED-XRF technique, 46.10±1.34 ppm of Potassium was found in the sampled sediment during the dry season while Uranium, Thorium and Potassium were beyond the limit of detection during the wet season The ED-XRF technique showed that 31.40±0.14 ppm of Potassium was present in algae during dry the season. Uranium, Thorium and Potassium were beyond detection limit in the water samples using ED-XRF. The interactions of the wet and dry season showed that the nuclides of Uranium, Thorium and Potassium series are on the move and no significant changes in the concentration of the nuclides from wet to dry season. Potassium obtained are above the permissible levels by IAEA and may have health implication on the environment and persons living around the Coastal areas.