Browsing by Author "Fasasi, Musbau Kewulere"
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Item Determination of Naturally Occurring Radionuclides and Heavy metals in Pegmatite Rock Using Energy Dispersive X-ray Fluorescence (EDXRF)(South Asian Research Journal of Natural Products, 2023-05-20) Fasiku, Taiwo Bukola; Fasasi, Musbau Kewulere; Amosun, Adebimpe AmosThis study was to analyse pegmatite rock samples in order to determine the concentrations of naturally occurring radionuclides and heavy metals present in the samples. The samples were analysed using non-destructive Energy Dispersive X-ray fluorescence (EDXRF) spectrometer. Place and Duration of Study: This work was carried out at the Centre for Energy and Research Development (CERD), Obafemi Awolowo University, Ile- Ife, Osun State, Nigeria between September 2016 and June 2017. In this study, analysis of ten randomly selected rock samples were carried out using EDXRF to determine the concentrations of the naturally occurring radionuclides and heavy metals presence. The elements detected were divided into three groups which include: radionuclides, major and minor elements which were related together using the Pearson correlation coefficient. The EDXRF analysis confirmed the presence of U (1.54 %), Th (0.40 %), and K (7.85 %) with concentrations higher than their permissible world values of 0.0002.8 %, 0.0007.4 %, and 1.3%, respectively. The samples contained seven major elements (Fe, Mn, Pb, Ti, La, Ca, and Ta) and fourteen minor elements including some heavy metals (Zn, Sr, Zr, Cr, Nb, Mg, Ce, Re, Hf, V, Al, Nd, Sc, and Y). The results showed a large quantity of Fe with an average value of 37.67 %. The presence of natural radionuclides and toxic metals like Cr, Pb, and Mn in significant quantity in some of the samples is of serious environmental and public concern. There is an absolute possibility that the heavy metal and the radionuclides find their ways into the natural ecosystem as a result of anthropogenic activities such as mining. This could pose miners, dwellers, and the general populace to a serious health risk.Item Measurement of Radioactivity Concentration in Pegmatite Rock Samples and Dose Assessment from Wamba in North Central Nigeria(Asian Journal of Physical and Chemical Sciences, 2022-11-12) Fasiku, Taiwo Bukola; Fasasi, Musbau Kewulere; Amosun, Adebimpe AmosTo evaluate the radiological impact parameters on mine workers. Study Design: The research work was carried out by using a gamma–ray spectrometer with a NaI (TI) detector. Place and Duration of Study: Centre for Energy and Research Development (CERD), Obafemi Awolowo University, Ile- Ife, Osun State, Nigeria between September 2016 and June 2017. The activity concentrations of 226Ra, 232Th, and 40K were determined in ten samples which were used to evaluate the absorbed dose rate, radium equivalent activity, external and internal hazard indices, representative level index, and annual effective dose equivalent. The average activity concentrations of 226Ra (24068.11 , 232Th (387.72 , 40 K (9509.24 ) and absorbed dose rate (11720.77 ) were higher than their respective recommended world mean values of 35 , 45 , 420 and 59 by UNSCEAR. The mean values of radium equivalent activity, external hazard index (Hex), internal hazard index (Hin), representative level index, and annual effective dose equivalent of the area under study were determined as 25346.82 , 68.52, 135.43, 357.95, and 14374.36 respectively. This study revealed that all the radiological parameters were higher than their respective recommended world average values. With the high concentrations obtained in this study, it is therefore concluded that this may pose a serious health risk to the miners and the general public. It is therefore advised that necessary guidelines should be provided for the exploration of minerals in this mining site.