ASSESSMENT OF NATURAL RADIOACTIVITY AND RADON EMANATION RATE FROM TIN MINE TAILINGS SITES AT JOS, NIGERIA

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dc.contributor.authorABDULWAHAB, Muhammad Bashir
dc.date.accessioned2021-10-26T08:22:34Z
dc.date.available2021-10-26T08:22:34Z
dc.date.issued2020-03
dc.descriptionA THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES, AHMADU BELLO UNIVERSITY, ZARIA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF MASTER DEGREE IN NUCLEAR PHYSICS DEPARTMENT OF PHYSICS, FACULTY OF PHYSICAL SCIENCES, AHMADU BELLO UNIVERSITY, ZARIA, NIGERIAen_US
dc.description.abstractThe tin mining activities in Jos result in a byproduct conventionally known as tailing(s). The release of this Radon gas into the atmosphere and the naturally occurring Radionuclide Materials associated with these tailings have radiological implications. In this research, assessment ofnaturally occurring Radionuclide Materials, radon emanation rate and relevant radiological hazard indices have been carried out in three tailing sites in Jos, Nigeria using Gamma ray spectroscopy and RAD7 detector. For Jos North LGA, the mean 226Ra, 232Th and 40K activity concentrations are 64.21±10.33, 441.37±57.13 and 84.72± 11.37respectively. For Barkinladi LGA, the mean 226Ra, 232Th and 40K activity concentrations are 52.36±7.99, 863.77±120.97 and 80.56±14.00 respectively. Finally, the mean 226Ra, 232Th and 40K activity concentrations for Jos south LGA are 30.32±4.03, 324.42±85.22 and 53.61±6.79 respectively. The activity concentration of K-40 exceeds that of Th-232 and Ra-226 in all the three tailing sites. The absorbed dose range from 92.49 – 119.47 nGyhr-1 with a mean value of 101.79 nGyhr-1for Jos North LGA. For Barikinladi LGA, the value ranges from 86.48 – 132.72 with a mean value of 112.34 nGyhr-1. Finally, for Jos South LGA, the absorbed dose range from 52.27 – 69.11 nGyhr-1 with a mean value of 62.33 nGyhr-1. The equivalent dose however does not exceed the acceptable limit in any of the sampling area. Both the internal and external hazard index suggests that the radiological risk associated with the tailing site for Jos North and Barikinladi is too close to the acceptable limit of 1 mGyyr-1. This implies that the radiological hazard potential in the areas is quite significant and thus radiation exposure mitigation steps need to be taken accordingly. Jos South tailing site is generally safe from radiation hazard point of view since there is no significant value recorded in all the radiological hazard indices.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/12663
dc.language.isoenen_US
dc.subjectASSESSMENT,en_US
dc.subjectNATURAL RADIOACTIVITY,en_US
dc.subjectRADON EMANATION RATE,en_US
dc.subjectTIN MINE TAILINGS SITES,en_US
dc.subjectJOS,en_US
dc.subjectNIGERIAen_US
dc.titleASSESSMENT OF NATURAL RADIOACTIVITY AND RADON EMANATION RATE FROM TIN MINE TAILINGS SITES AT JOS, NIGERIAen_US
dc.typeThesisen_US
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