Rilwan Usman - Academia.edu (original) (raw)
Papers by Rilwan Usman
Energies
Balancing electricity demand and supply remains a significant challenge for the power systems in ... more Balancing electricity demand and supply remains a significant challenge for the power systems in developing countries, such as Nigeria. In Nigeria, there is a shortage of adequate power supply, and demand-side management (DSM) plays a minor role in the power balancing mechanism with load shedding being widely used. The paper aims to review and compare various existing and emerging DSM strategies in developing countries. An extensive and systematic review was conducted to evaluate potential solutions using DSM to increase the overall energy efficiency in the Nigerian electricity market. This study found that, although the technical and economic potentials of DSM vary in developed countries, the uptakes of DSM have been severely hampered hence preventing the full exploitation and utilisation of the full potential of DSM. The initiatives of a DSM model in Nigeria and other developing countries can play a significant role in addressing demand and supply challenges but an upgrade of the ...
Journal of Oncology Research
Accumulation of heavy metals in agricultural soils is instigated by industrial and other human ac... more Accumulation of heavy metals in agricultural soils is instigated by industrial and other human activities such as mining, smelting, cement-pollution, energy and fuel production, power transmission, traffic activities, intensive agriculture, sludge dumping and melting operations. Plants received heavy metals from soils through ionic exchange, redox reactions, precipitation-dissolution, and so on. Which implies that the solubility of trace elements based on factors like minerals in the soil (carbonates, oxide, hydroxide etc.), soil organic matter (humic acids, fulvic acids, polysaccharides and organic acids), soil pH, redox potential, content, nutrient balance, other trace elements concentration in soil, physical and mechanical characteristics of soil, soil temperature and humidity, and so on. In this study, the soil-edible plant and soil-water Transfer Factor (TF) for various metals showed that the TF values differed slightly between the locations. On soil-edible plant transfer, the ...
Journal of Oncology Research
The interaction of ionizing radiation with human body, either from external sources (i.e. outside... more The interaction of ionizing radiation with human body, either from external sources (i.e. outside the body) or from internal contamination of the body by radioactive substances, leads to biological effects which may later show up as clinical symptoms. The nature and severity of these symptoms and the time at which they appear depend on the amount of radiation absorbed and the rate at which it is received. This study aimed at assessing the Health Effects of Radiation Exposure to Human Sensitive Organs across Some Selected Mining Sites of Plateau State Nigeria. Finding of this study have revealed that the mean Dorgan values for the lungs, ovaries, bone marrow, testes, kidney, liver and whole body for different mining points of Plateau State are 0.29, 0.26, 0.31, 0.36, 0.28, 0.21 and 0.30 mSv/y respectively. From the findings presented, it can be concluded that the background radiation in Plateau State is not an issue of health concern in regards to sensitive organs and may not course ...
Non-Metallic Material Science
The research intends to bring out the contribution of leachate on groundwater in two dumpsites in... more The research intends to bring out the contribution of leachate on groundwater in two dumpsites in Nguru and Potiskum all in Yobe state, Nigeria. A total of seven (7) and eight (8) VES by Schlumberger electrode with the use of Wenner electrode configuration. The results were interpreted by the use of WinRESIST for VES and IPWIN2INV for ERT. The study pointed out that, the area in question is comprised of four layers of geoelectric such as the topsoil, clay, sand, sandy clay and sand. The range of the first resistivity layer was from 6.16 Ωm to 332 Ωm in the first geo-electric layer and its thickness range from 2.77 m to 37.7 m and a depth range of 2.77 m to 37.7 m. the range of the second resistivity layer was from 16.5 Ωm to 37.9 Ωm which has the range of its thickness from 4.1 m to 10.7 m. The range of the third resistivity layer was from 101.2 Ωm to 288.2 Ωm which has the range of its thickness from 38.9 m to 99.7 m, and the first aquifer in the area. The range of the first resist...
Asian Oncology Research Journal, Jul 21, 2020
Heavy metals are divided according to their need for different organisms. Risks of heavy metal co... more Heavy metals are divided according to their need for different organisms. Risks of heavy metal contamination in Soil-Pant System through the application of copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn) are essential to plants, animals and humans and Selenium (Se) are essential only to animals and humans, while chromium (Cr) and nickel (Ni) are essential to humans and plants. This study aimed at evaluating the carcinogenic and non-carcinogenic risk of the study area using X-Ray fluoroscopy. The results show that, mean concentration levels of heavy metals in soil from Nasarawa State varied significantly and decreased in order of Cd(524.5) > Zn(502.8) > Ni(462.1) > Cu(314.1) > Pb(295.5) > Cr(278.1) > As(13.5). The Hazard Quotient (HQ) for both adults and children in terms of ingestion, inhalation and dermal contact pathways were all recorded to be lower than unity. The Total Risk and the Hazard Index (HI) were also recorded to be 1.1 x 10-2 and 1.4 x 10-1 respectively, values less than unity. This makes non-carcinogenic effects insignificant to the population and may not poses serious non-carcinogenic effects in the area under study.
Journal of Physics & Astronomy, 2021
International Astronomy and Astrophysics Research Journal, 2019
This study evaluate the existence radionuclides in some Ongoing dug boreholes across Keffi town o... more This study evaluate the existence radionuclides in some Ongoing dug boreholes across Keffi town of Nasarawa State, Nigeria using a hand held interceptor TM-Thermo scientific radio nuclear identiFINDER designed for in situ operation. Gamma Activity, possible radionuclide present and their trust levels, Exposure Dose Rate, Absorbed Dose Rate, Effective Dose Rates and Excess Lifetime Cancer Risk were determined. Results obtained shows that the Gamma Activity Level ranged from 0.243 to 0.589 mrem/hr with the mean of 0.441 mrem/hr. Exposure Dose Rate of the study area ranged from 2.43 to 5.89 µSv/hr with the mean of 4.41 µSv/hr. The local miners in the study area are subjected to Absorb Dose Rate ranging from 2430 to 5890 nGy/hr with the mean value of 4410 nGy/hr. Effective Dose Rate of the area under investigation were ranged from 0.42 to 0.99 mSv/yr with a mean of 0.74 mSv/yr. The Excess Lifetime Cancer Risk of the area ranged from
FUDMA JOURNAL OF SCIENCES, 2022
Metals are substances with high electrical conductivity, malleability, and luster, which voluntar... more Metals are substances with high electrical conductivity, malleability, and luster, which voluntarily lose their electrons to form cations. This study aimed at assessing the Toxic implications of Heavy Metals in Drinking Water Sources of Loko and Mararraba in Nasarawa using Micro Plasma Atomic Emission Spectroscopy (MP-AES). The results showed that, seven heavy metals along with their respective concentrations for both Loko and Mararraba in mg/L (Zn (0.19 and 0.23), Cd (0.00 and 0.00), Fe (0.05 and 0.04), Cu (0.01 and 0.01), Pd (0.01 and 0.01), Ni (0.003 and 0.002) and Mn (0.092 and 0.027)) respectively were present in the water samples. The Hazard Quotient (HQ) was all recorded to be lower than unity. The Hazard Index (HI) was also recorded to be 4.6x10-4 and 5.7 x 10-4 for both Loko and Mararraba respectively, value less than unity. This makes non-carcinogenic effects negligible. The total excess life cancer risk was found to be 36.1.4x10-13 and 41.46x10-13 for both Loko and Mararr...
Journal of Oncology Research, 2021
This research reports an assessment of ionizing radiation in some chosen Dumpsites in Lafia Local... more This research reports an assessment of ionizing radiation in some chosen Dumpsites in Lafia Local government area of Nasarawa State. Ionizing radiation measurement was conducted at four Dump sites. The survey was done using a radiation survey meter (Radex one Outdoor 55130719 NA). Radiation exposure rate in micro sievert per hour (μSvhr-1) was measured. Readings were taken by placing the detector at gonad level about 1 meter above the ground. Result showed that the average annual effective dose rate in the selected dumpsites were 0.22 mSv/yr for Lafia modern market, 0.17 mSv/yr for dumpsite opposite governor Isa house, 0.15 mSv/yr for Timber shade Lafia and 0.20 mSv/yrfor Science School Lafia respectively with a mean value of 0.19 mSv/yr for all location, while the mean calculated excess life cancer risk (ELCR) is 0.65 x 10-3.Dumpsites yearly absorbed dose rate and their corresponding ELCR values did not exceed the 1.0 mSv/y Basic Safety Standard set for the masses by International ...
Journal of Oncology Research, 2022
This research intends to unveil the presence of radioisotopes in the soil of some mining sites in... more This research intends to unveil the presence of radioisotopes in the soil of some mining sites in Nasarawa of Nasarawa state using thermos-scientific interceptor (IdentiFINDER). The work aimed at detecting the presence, types and trust level of radioisotopes. The result showed that, 103Pd and 125I were found in 57% of the total points and the percentage abundance of the detector reached 50-65% indicating that, those radioisotopes are likely found in the area, 109Cd was found in 15% of the total areas. The percentage abundance of the detector for 109Cd shows 50% indicating that, those radioisotopes are likely to be found in the area, 241Am was found in 7% of the total areas. The percentage abundance of the detector for 241Am shows 81% indicating that, those radioisotopes are likely found in the area, 235U was found in 7% of the total points. The percentage abundance of the detector for 235U reaches 57% indicating that, those radioisotopes are likely found in the area, 75Se was found ...
International Journal of Theoretical & Computational Physics, 2021
Golden metric tensors exterior to hypothetical distribution of mass whose field varies with time ... more Golden metric tensors exterior to hypothetical distribution of mass whose field varies with time and radial distance have been used to construct the coefficient of affine connections that invariably was used to obtained the Einstein’s equations of motion for test particles of non-zero rest masses. The expression for the variation of time on a clock moving in this gravitational field was derived using the time equation of motion. The test particles in this field under the condition of pure polar motion have an inverse square dependence velocity which depends on radial distance. Our result indicates that despite using the golden metric tensor, the inverse square dependence of the velocity on radial distance has not been changed.
International Journal of Theoretical & Computational Physics, 2021
In general theory of relativity, Einstein’s field equations relate the geometry of space-time wit... more In general theory of relativity, Einstein’s field equations relate the geometry of space-time with the distribution of matter within it. These equations were first published by Einstein in the form of a tensor equation which related the local space-time curvature with the local energy and momentum within this space-time. In this article, Einstein’s geometrical field equations interior and exterior to astrophysically real or hypothetical distribution of mass within a spherical geometry were constructed and solved for field whose gravitational potential varies with time, radial distance and polar angle. The exterior solution was obtained using power series. The metric tensors and the solution of the Einstein’s exterior field equations used in this work has only one arbitrary function f(t,r,θ) , and thus put the Einstein’s geometrical theory of gravitation on the same bases with the Newton’s dynamical theory of gravitation. The gravitational scalar potential f(t,r,θ) obtained in this r...
This study evaluates the existence of radionuclides in some mining sites in Mararaba-Udege using ... more This study evaluates the existence of radionuclides in some mining sites in Mararaba-Udege using a hand held interceptor TM–Thermo scientific radio nuclear identiFINDER designed for in situ operation. The device is placed in contact with the soil and the radionuclides in the soil are detected as well as the contribution of those radionuclides to the background radiation. Gamma Activity (mRem/yr), possible radionuclide present and their trust levels, Exposure Dose Rate ($\mu$Sv/hr), Absorbed Dose Rate (nGy/hr), Effective Dose Rates (mSv/yr) and Excess Lifetime Cancer Risk, were determined. Results obtained shows that the gamma activity level ranged from 0.955 to 1.260 mrem/hr with the mean of 1.1245 mrem/hr. Exposure dose rate of the study area ranged from 9.55 to 12.6 mu\mumuSv/hr with the mean of 11.245 mu\mumuSv/hr. The local miners in the study area are subjected to absorb dose rate ranging from 9553 to 12600 nGy/hr with the mean value of 11245 nGy/hr. Effective dose rate of the area...
Journal of Oncology Research, 2021
A survey of Fertility Cancer and Hereditary Risks in Soil Sample of Nasarawa was carried out. Thi... more A survey of Fertility Cancer and Hereditary Risks in Soil Sample of Nasarawa was carried out. This study assessed the level of Fertility Cancer and Hereditary Risks in some part of Nasarawa using the gamma-ray spectrometry. The mean concentration for 40K was 645.29 ± 07.32 Bq/kg, for 226Ra was 28.43 ± 4.8422 Bq/Kg and for 232Th was 66.84 ± 2.0201 Bq/Kg. The average effective dose due to the ingestion was 0.36±0.1µSv/y which was approximately 1000 times lower than the world average effective dose. Radium equivalent activity Raeq (Bq/kg), alpha index and total cancer risk were found to be 161.44±8.08 Bq/kg, 0.142±0.02 and (0.21±0.05) ×10-5 respectively. UNSCEAR/ USEPA stipulated that; radium equivalent activity, alpha index, effective dose and total cancer risk should not exceed the limit of 370 Bq/kg, unity, 300 µSv/y and 1 ×10-4 respectively. Hence the values obtained in this work were within the acceptable limits. This implies that the ingestion or inhalation of soil is not associa...
Swampy agricultural soils could be contaminated as a result of accumulation of heavy metals throu... more Swampy agricultural soils could be contaminated as a result of accumulation of heavy metals through emission from industrial areas, mines tailings, metal wastes, gasoline, paints, fertilizers, manure, sewage sludge, pesticide, waste water irrigation, coal combustion residue, spillage of petrochemicals and atmospheric deposition. This study aimed at evaluating the carcinogenic and non-carcinogenic risk of the study area using X-Ray fluoroscopy. The results showed that, mean concentration level in the area was in decreasing order Cu(342.2) > Cr(486.6) > Ni(339.1) > Zn(421.6) >Pb(331) > Cd(336.6) > As(31.7). The Hazard Quotient (HQ) was all recorded to be low except ingestion adult which was higher than unity. The Hazard Index (HI) was also recorded to be 2.3 a value greater than one (>>1). This makes non-carcinogenic effects significant to the Original Research Article Rilwan et al.; IRJO, 3(2): 1-12, 2020; Article no.IRJO.56777 2 population and poses serious e...
Asian Journal of Applied Chemistry Research, 2020
Absorption of heavy metals through swampy agricultural soils may have serious consequences on hum... more Absorption of heavy metals through swampy agricultural soils may have serious consequences on human health. Present study determined the levels of Chromium (Cr), Nickel (Ni), Copper (Cu), Zinc (Zn), Arsenic (As), Cadmium (Cd) and Lead (Pb) using X- Ray Spectrometry in 10 swampy agricultural soils. The result of this study revealed that, the heavy metals with their respective concentrations (Cr (278.1), Ni (462.1), Cu (314.1), Zn (502.8), As (13.5), Cd (524.5) and Pb (295.5)) were found in the soil samples in mg/kg. It also pointed out that the concentration of the heavy metals in the all soil samples for all locations in decreasing order was Cd > Zn >Ni > Cu >Pb > Cr >As. The concentration in swampy agricultural soils from Kokona was obviously higher than the safe limit set by the regulatory bodies which may be because of the geological activities in the studied area. Hence, heavy metals accumulation in swampy agricultural soils is a big concern in Kokona where peo...
Asian Journal of Research and Reviews in Physics, 2020
This study assessed gamma radiation from 232Th, 226Ra and 40K. Twelve soil samples collected from... more This study assessed gamma radiation from 232Th, 226Ra and 40K. Twelve soil samples collected from the study area were analyzed using Nal (TI) detector. Mean concentration for 40K, 232Th and 226Ra were found to be 483.97±7.32 Bq/kg, 28.43±5.30 Bq/kgS and 66.84±2.02 Bq/kg respectively. Absorbed Dose Rate ranged from 44.85 nGy/h to 90.71 nGy/h with a mean of 73.68 nGy/h. Effective Dose Rate ranged from 0.055 to 0.111 msv/yr with a mean of 0.090 mSv/y. The Internal and External Hazard Indices ranged from 0.271 to 0.533 Bq/kg with the mean of 0.435 Bq/kg and 0.289 to 0.675 Bq/kg with the mean of 0.512 Bq/kg respectively. It can thus be concluded that the radiation dose of the study area is minimal and seems to have low exposure for the inhabitants in and around the contaminated areas. It is therefore recommended that regular radiation monitoring exercises should be conducted on the processing sites to prevent the inhabitants of the area from high radiation exposure due to direct inhalati...
Asian Journal of Research and Reviews in Physics, 2020
This work evaluates the radiation hazard indices from some selected mining sites in Nasarawa West... more This work evaluates the radiation hazard indices from some selected mining sites in Nasarawa West, using Sodium Iodide Thallium Gamma Spectrometry. Raeq ranged from 100.39-197.40 Bq/Kg with a mean 161.44 Bq/Kg, which is lower than the average of 370 Bq/Kg. The GADR ranged from 44.85 nGy/hr-90.71 nGy/hr with the mean 73.68 nGy/hr. which is also below the average of 89 nGy/hr for soil. The AGED ranged from 315.77 mSv/yr-640.91 mSv/yr with the mean 519.19. Which is above the threshold value of 300 mSv/yr. ACI ranged from 0.73-1.45 with the mean value 1.18 which is above the standard of unity. The AEDE (outdoor) ranges from 0.055 mSv/yr-0.111 mSv/yr with the mean 0.090 mSv/yr which is above the 0.07 mSv/yr standard permissible limit. The AEDE (indoor) ranged from 0.220 mSv/yr-0.445 mSv/yr, with the mean value 0.361mSv/yr. This is below the 0.45 mSv/yr threshold. The ELCR ranged from 00.770-1.558 with the mean value 1.265 and from 0.193-0.389 with the mean value 0.317 for outdoor and ind...
Asian Journal of Applied Chemistry Research, 2020
Swampy agricultural soils could be contaminated as a result of accumulation of heavy metals throu... more Swampy agricultural soils could be contaminated as a result of accumulation of heavy metals through emission from industrial areas, mines tailings, metal wastes, gasoline, paints, fertilizers, manure, sewage sludge, pesticide, waste water irrigation, coal combustion residue, spillage of petrochemicals and atmospheric deposition. This study aimed at evaluating the carcinogenic and non-carcinogenic risk of the study area using X-Ray fluoroscopy. The results shows that, mean concentration level in the area was in decreasing order Ni(525) > Cu(515.9) > Zn(367.6) > Cr(336.6) > Cd(260.9) > Pb(219.5) > As(18.9). The Hazard Quotient (HQ) was all recorded to be low except ingestion adult which is higher than unity. The Hazard Index (HI) was also recorded to be 2.3 a value greater than one (>>1). This makes non-carcinogenic effects significant to the population and poses serious effects in the area under study. The total excess life cancer risk were found to be (5.0 x ...
Asian Journal of Advanced Research and Reports, 2020
This study has established local diagnostic reference levels (LDRLs). Dose report and scan parame... more This study has established local diagnostic reference levels (LDRLs). Dose report and scan parameters for abdomen was assessed during the period of seven months at the three study centres. Data on CT Dose index (CTDIw) and dose length product (DLP) available and achieved on CT scanner control console was recorded for a minimum of 10 average sized patients for each facility to established a local Diagnostic reference level (LDRLs) and radiation dose optimization Data was collected using a purposive sampling technique, from 131 adult patients weighing 70±3 kg) from Philip brilliance, Toshiba Alexion and General Electric (GE) CT scanners for this study. Third quartile values of the estimated LDRLs for CTDIw and DLP was determined as 12.7 mGy and 560 mGy*cm. The mean CTDIw obtained are lower to the reported data from the European Commission of 35 mGy. The mean DLP are comparably lower than all the reported value from the European commission of 780 mGy/cm. Therefore, there is no any clin...
Energies
Balancing electricity demand and supply remains a significant challenge for the power systems in ... more Balancing electricity demand and supply remains a significant challenge for the power systems in developing countries, such as Nigeria. In Nigeria, there is a shortage of adequate power supply, and demand-side management (DSM) plays a minor role in the power balancing mechanism with load shedding being widely used. The paper aims to review and compare various existing and emerging DSM strategies in developing countries. An extensive and systematic review was conducted to evaluate potential solutions using DSM to increase the overall energy efficiency in the Nigerian electricity market. This study found that, although the technical and economic potentials of DSM vary in developed countries, the uptakes of DSM have been severely hampered hence preventing the full exploitation and utilisation of the full potential of DSM. The initiatives of a DSM model in Nigeria and other developing countries can play a significant role in addressing demand and supply challenges but an upgrade of the ...
Journal of Oncology Research
Accumulation of heavy metals in agricultural soils is instigated by industrial and other human ac... more Accumulation of heavy metals in agricultural soils is instigated by industrial and other human activities such as mining, smelting, cement-pollution, energy and fuel production, power transmission, traffic activities, intensive agriculture, sludge dumping and melting operations. Plants received heavy metals from soils through ionic exchange, redox reactions, precipitation-dissolution, and so on. Which implies that the solubility of trace elements based on factors like minerals in the soil (carbonates, oxide, hydroxide etc.), soil organic matter (humic acids, fulvic acids, polysaccharides and organic acids), soil pH, redox potential, content, nutrient balance, other trace elements concentration in soil, physical and mechanical characteristics of soil, soil temperature and humidity, and so on. In this study, the soil-edible plant and soil-water Transfer Factor (TF) for various metals showed that the TF values differed slightly between the locations. On soil-edible plant transfer, the ...
Journal of Oncology Research
The interaction of ionizing radiation with human body, either from external sources (i.e. outside... more The interaction of ionizing radiation with human body, either from external sources (i.e. outside the body) or from internal contamination of the body by radioactive substances, leads to biological effects which may later show up as clinical symptoms. The nature and severity of these symptoms and the time at which they appear depend on the amount of radiation absorbed and the rate at which it is received. This study aimed at assessing the Health Effects of Radiation Exposure to Human Sensitive Organs across Some Selected Mining Sites of Plateau State Nigeria. Finding of this study have revealed that the mean Dorgan values for the lungs, ovaries, bone marrow, testes, kidney, liver and whole body for different mining points of Plateau State are 0.29, 0.26, 0.31, 0.36, 0.28, 0.21 and 0.30 mSv/y respectively. From the findings presented, it can be concluded that the background radiation in Plateau State is not an issue of health concern in regards to sensitive organs and may not course ...
Non-Metallic Material Science
The research intends to bring out the contribution of leachate on groundwater in two dumpsites in... more The research intends to bring out the contribution of leachate on groundwater in two dumpsites in Nguru and Potiskum all in Yobe state, Nigeria. A total of seven (7) and eight (8) VES by Schlumberger electrode with the use of Wenner electrode configuration. The results were interpreted by the use of WinRESIST for VES and IPWIN2INV for ERT. The study pointed out that, the area in question is comprised of four layers of geoelectric such as the topsoil, clay, sand, sandy clay and sand. The range of the first resistivity layer was from 6.16 Ωm to 332 Ωm in the first geo-electric layer and its thickness range from 2.77 m to 37.7 m and a depth range of 2.77 m to 37.7 m. the range of the second resistivity layer was from 16.5 Ωm to 37.9 Ωm which has the range of its thickness from 4.1 m to 10.7 m. The range of the third resistivity layer was from 101.2 Ωm to 288.2 Ωm which has the range of its thickness from 38.9 m to 99.7 m, and the first aquifer in the area. The range of the first resist...
Asian Oncology Research Journal, Jul 21, 2020
Heavy metals are divided according to their need for different organisms. Risks of heavy metal co... more Heavy metals are divided according to their need for different organisms. Risks of heavy metal contamination in Soil-Pant System through the application of copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn) are essential to plants, animals and humans and Selenium (Se) are essential only to animals and humans, while chromium (Cr) and nickel (Ni) are essential to humans and plants. This study aimed at evaluating the carcinogenic and non-carcinogenic risk of the study area using X-Ray fluoroscopy. The results show that, mean concentration levels of heavy metals in soil from Nasarawa State varied significantly and decreased in order of Cd(524.5) > Zn(502.8) > Ni(462.1) > Cu(314.1) > Pb(295.5) > Cr(278.1) > As(13.5). The Hazard Quotient (HQ) for both adults and children in terms of ingestion, inhalation and dermal contact pathways were all recorded to be lower than unity. The Total Risk and the Hazard Index (HI) were also recorded to be 1.1 x 10-2 and 1.4 x 10-1 respectively, values less than unity. This makes non-carcinogenic effects insignificant to the population and may not poses serious non-carcinogenic effects in the area under study.
Journal of Physics & Astronomy, 2021
International Astronomy and Astrophysics Research Journal, 2019
This study evaluate the existence radionuclides in some Ongoing dug boreholes across Keffi town o... more This study evaluate the existence radionuclides in some Ongoing dug boreholes across Keffi town of Nasarawa State, Nigeria using a hand held interceptor TM-Thermo scientific radio nuclear identiFINDER designed for in situ operation. Gamma Activity, possible radionuclide present and their trust levels, Exposure Dose Rate, Absorbed Dose Rate, Effective Dose Rates and Excess Lifetime Cancer Risk were determined. Results obtained shows that the Gamma Activity Level ranged from 0.243 to 0.589 mrem/hr with the mean of 0.441 mrem/hr. Exposure Dose Rate of the study area ranged from 2.43 to 5.89 µSv/hr with the mean of 4.41 µSv/hr. The local miners in the study area are subjected to Absorb Dose Rate ranging from 2430 to 5890 nGy/hr with the mean value of 4410 nGy/hr. Effective Dose Rate of the area under investigation were ranged from 0.42 to 0.99 mSv/yr with a mean of 0.74 mSv/yr. The Excess Lifetime Cancer Risk of the area ranged from
FUDMA JOURNAL OF SCIENCES, 2022
Metals are substances with high electrical conductivity, malleability, and luster, which voluntar... more Metals are substances with high electrical conductivity, malleability, and luster, which voluntarily lose their electrons to form cations. This study aimed at assessing the Toxic implications of Heavy Metals in Drinking Water Sources of Loko and Mararraba in Nasarawa using Micro Plasma Atomic Emission Spectroscopy (MP-AES). The results showed that, seven heavy metals along with their respective concentrations for both Loko and Mararraba in mg/L (Zn (0.19 and 0.23), Cd (0.00 and 0.00), Fe (0.05 and 0.04), Cu (0.01 and 0.01), Pd (0.01 and 0.01), Ni (0.003 and 0.002) and Mn (0.092 and 0.027)) respectively were present in the water samples. The Hazard Quotient (HQ) was all recorded to be lower than unity. The Hazard Index (HI) was also recorded to be 4.6x10-4 and 5.7 x 10-4 for both Loko and Mararraba respectively, value less than unity. This makes non-carcinogenic effects negligible. The total excess life cancer risk was found to be 36.1.4x10-13 and 41.46x10-13 for both Loko and Mararr...
Journal of Oncology Research, 2021
This research reports an assessment of ionizing radiation in some chosen Dumpsites in Lafia Local... more This research reports an assessment of ionizing radiation in some chosen Dumpsites in Lafia Local government area of Nasarawa State. Ionizing radiation measurement was conducted at four Dump sites. The survey was done using a radiation survey meter (Radex one Outdoor 55130719 NA). Radiation exposure rate in micro sievert per hour (μSvhr-1) was measured. Readings were taken by placing the detector at gonad level about 1 meter above the ground. Result showed that the average annual effective dose rate in the selected dumpsites were 0.22 mSv/yr for Lafia modern market, 0.17 mSv/yr for dumpsite opposite governor Isa house, 0.15 mSv/yr for Timber shade Lafia and 0.20 mSv/yrfor Science School Lafia respectively with a mean value of 0.19 mSv/yr for all location, while the mean calculated excess life cancer risk (ELCR) is 0.65 x 10-3.Dumpsites yearly absorbed dose rate and their corresponding ELCR values did not exceed the 1.0 mSv/y Basic Safety Standard set for the masses by International ...
Journal of Oncology Research, 2022
This research intends to unveil the presence of radioisotopes in the soil of some mining sites in... more This research intends to unveil the presence of radioisotopes in the soil of some mining sites in Nasarawa of Nasarawa state using thermos-scientific interceptor (IdentiFINDER). The work aimed at detecting the presence, types and trust level of radioisotopes. The result showed that, 103Pd and 125I were found in 57% of the total points and the percentage abundance of the detector reached 50-65% indicating that, those radioisotopes are likely found in the area, 109Cd was found in 15% of the total areas. The percentage abundance of the detector for 109Cd shows 50% indicating that, those radioisotopes are likely to be found in the area, 241Am was found in 7% of the total areas. The percentage abundance of the detector for 241Am shows 81% indicating that, those radioisotopes are likely found in the area, 235U was found in 7% of the total points. The percentage abundance of the detector for 235U reaches 57% indicating that, those radioisotopes are likely found in the area, 75Se was found ...
International Journal of Theoretical & Computational Physics, 2021
Golden metric tensors exterior to hypothetical distribution of mass whose field varies with time ... more Golden metric tensors exterior to hypothetical distribution of mass whose field varies with time and radial distance have been used to construct the coefficient of affine connections that invariably was used to obtained the Einstein’s equations of motion for test particles of non-zero rest masses. The expression for the variation of time on a clock moving in this gravitational field was derived using the time equation of motion. The test particles in this field under the condition of pure polar motion have an inverse square dependence velocity which depends on radial distance. Our result indicates that despite using the golden metric tensor, the inverse square dependence of the velocity on radial distance has not been changed.
International Journal of Theoretical & Computational Physics, 2021
In general theory of relativity, Einstein’s field equations relate the geometry of space-time wit... more In general theory of relativity, Einstein’s field equations relate the geometry of space-time with the distribution of matter within it. These equations were first published by Einstein in the form of a tensor equation which related the local space-time curvature with the local energy and momentum within this space-time. In this article, Einstein’s geometrical field equations interior and exterior to astrophysically real or hypothetical distribution of mass within a spherical geometry were constructed and solved for field whose gravitational potential varies with time, radial distance and polar angle. The exterior solution was obtained using power series. The metric tensors and the solution of the Einstein’s exterior field equations used in this work has only one arbitrary function f(t,r,θ) , and thus put the Einstein’s geometrical theory of gravitation on the same bases with the Newton’s dynamical theory of gravitation. The gravitational scalar potential f(t,r,θ) obtained in this r...
This study evaluates the existence of radionuclides in some mining sites in Mararaba-Udege using ... more This study evaluates the existence of radionuclides in some mining sites in Mararaba-Udege using a hand held interceptor TM–Thermo scientific radio nuclear identiFINDER designed for in situ operation. The device is placed in contact with the soil and the radionuclides in the soil are detected as well as the contribution of those radionuclides to the background radiation. Gamma Activity (mRem/yr), possible radionuclide present and their trust levels, Exposure Dose Rate ($\mu$Sv/hr), Absorbed Dose Rate (nGy/hr), Effective Dose Rates (mSv/yr) and Excess Lifetime Cancer Risk, were determined. Results obtained shows that the gamma activity level ranged from 0.955 to 1.260 mrem/hr with the mean of 1.1245 mrem/hr. Exposure dose rate of the study area ranged from 9.55 to 12.6 mu\mumuSv/hr with the mean of 11.245 mu\mumuSv/hr. The local miners in the study area are subjected to absorb dose rate ranging from 9553 to 12600 nGy/hr with the mean value of 11245 nGy/hr. Effective dose rate of the area...
Journal of Oncology Research, 2021
A survey of Fertility Cancer and Hereditary Risks in Soil Sample of Nasarawa was carried out. Thi... more A survey of Fertility Cancer and Hereditary Risks in Soil Sample of Nasarawa was carried out. This study assessed the level of Fertility Cancer and Hereditary Risks in some part of Nasarawa using the gamma-ray spectrometry. The mean concentration for 40K was 645.29 ± 07.32 Bq/kg, for 226Ra was 28.43 ± 4.8422 Bq/Kg and for 232Th was 66.84 ± 2.0201 Bq/Kg. The average effective dose due to the ingestion was 0.36±0.1µSv/y which was approximately 1000 times lower than the world average effective dose. Radium equivalent activity Raeq (Bq/kg), alpha index and total cancer risk were found to be 161.44±8.08 Bq/kg, 0.142±0.02 and (0.21±0.05) ×10-5 respectively. UNSCEAR/ USEPA stipulated that; radium equivalent activity, alpha index, effective dose and total cancer risk should not exceed the limit of 370 Bq/kg, unity, 300 µSv/y and 1 ×10-4 respectively. Hence the values obtained in this work were within the acceptable limits. This implies that the ingestion or inhalation of soil is not associa...
Swampy agricultural soils could be contaminated as a result of accumulation of heavy metals throu... more Swampy agricultural soils could be contaminated as a result of accumulation of heavy metals through emission from industrial areas, mines tailings, metal wastes, gasoline, paints, fertilizers, manure, sewage sludge, pesticide, waste water irrigation, coal combustion residue, spillage of petrochemicals and atmospheric deposition. This study aimed at evaluating the carcinogenic and non-carcinogenic risk of the study area using X-Ray fluoroscopy. The results showed that, mean concentration level in the area was in decreasing order Cu(342.2) > Cr(486.6) > Ni(339.1) > Zn(421.6) >Pb(331) > Cd(336.6) > As(31.7). The Hazard Quotient (HQ) was all recorded to be low except ingestion adult which was higher than unity. The Hazard Index (HI) was also recorded to be 2.3 a value greater than one (>>1). This makes non-carcinogenic effects significant to the Original Research Article Rilwan et al.; IRJO, 3(2): 1-12, 2020; Article no.IRJO.56777 2 population and poses serious e...
Asian Journal of Applied Chemistry Research, 2020
Absorption of heavy metals through swampy agricultural soils may have serious consequences on hum... more Absorption of heavy metals through swampy agricultural soils may have serious consequences on human health. Present study determined the levels of Chromium (Cr), Nickel (Ni), Copper (Cu), Zinc (Zn), Arsenic (As), Cadmium (Cd) and Lead (Pb) using X- Ray Spectrometry in 10 swampy agricultural soils. The result of this study revealed that, the heavy metals with their respective concentrations (Cr (278.1), Ni (462.1), Cu (314.1), Zn (502.8), As (13.5), Cd (524.5) and Pb (295.5)) were found in the soil samples in mg/kg. It also pointed out that the concentration of the heavy metals in the all soil samples for all locations in decreasing order was Cd > Zn >Ni > Cu >Pb > Cr >As. The concentration in swampy agricultural soils from Kokona was obviously higher than the safe limit set by the regulatory bodies which may be because of the geological activities in the studied area. Hence, heavy metals accumulation in swampy agricultural soils is a big concern in Kokona where peo...
Asian Journal of Research and Reviews in Physics, 2020
This study assessed gamma radiation from 232Th, 226Ra and 40K. Twelve soil samples collected from... more This study assessed gamma radiation from 232Th, 226Ra and 40K. Twelve soil samples collected from the study area were analyzed using Nal (TI) detector. Mean concentration for 40K, 232Th and 226Ra were found to be 483.97±7.32 Bq/kg, 28.43±5.30 Bq/kgS and 66.84±2.02 Bq/kg respectively. Absorbed Dose Rate ranged from 44.85 nGy/h to 90.71 nGy/h with a mean of 73.68 nGy/h. Effective Dose Rate ranged from 0.055 to 0.111 msv/yr with a mean of 0.090 mSv/y. The Internal and External Hazard Indices ranged from 0.271 to 0.533 Bq/kg with the mean of 0.435 Bq/kg and 0.289 to 0.675 Bq/kg with the mean of 0.512 Bq/kg respectively. It can thus be concluded that the radiation dose of the study area is minimal and seems to have low exposure for the inhabitants in and around the contaminated areas. It is therefore recommended that regular radiation monitoring exercises should be conducted on the processing sites to prevent the inhabitants of the area from high radiation exposure due to direct inhalati...
Asian Journal of Research and Reviews in Physics, 2020
This work evaluates the radiation hazard indices from some selected mining sites in Nasarawa West... more This work evaluates the radiation hazard indices from some selected mining sites in Nasarawa West, using Sodium Iodide Thallium Gamma Spectrometry. Raeq ranged from 100.39-197.40 Bq/Kg with a mean 161.44 Bq/Kg, which is lower than the average of 370 Bq/Kg. The GADR ranged from 44.85 nGy/hr-90.71 nGy/hr with the mean 73.68 nGy/hr. which is also below the average of 89 nGy/hr for soil. The AGED ranged from 315.77 mSv/yr-640.91 mSv/yr with the mean 519.19. Which is above the threshold value of 300 mSv/yr. ACI ranged from 0.73-1.45 with the mean value 1.18 which is above the standard of unity. The AEDE (outdoor) ranges from 0.055 mSv/yr-0.111 mSv/yr with the mean 0.090 mSv/yr which is above the 0.07 mSv/yr standard permissible limit. The AEDE (indoor) ranged from 0.220 mSv/yr-0.445 mSv/yr, with the mean value 0.361mSv/yr. This is below the 0.45 mSv/yr threshold. The ELCR ranged from 00.770-1.558 with the mean value 1.265 and from 0.193-0.389 with the mean value 0.317 for outdoor and ind...
Asian Journal of Applied Chemistry Research, 2020
Swampy agricultural soils could be contaminated as a result of accumulation of heavy metals throu... more Swampy agricultural soils could be contaminated as a result of accumulation of heavy metals through emission from industrial areas, mines tailings, metal wastes, gasoline, paints, fertilizers, manure, sewage sludge, pesticide, waste water irrigation, coal combustion residue, spillage of petrochemicals and atmospheric deposition. This study aimed at evaluating the carcinogenic and non-carcinogenic risk of the study area using X-Ray fluoroscopy. The results shows that, mean concentration level in the area was in decreasing order Ni(525) > Cu(515.9) > Zn(367.6) > Cr(336.6) > Cd(260.9) > Pb(219.5) > As(18.9). The Hazard Quotient (HQ) was all recorded to be low except ingestion adult which is higher than unity. The Hazard Index (HI) was also recorded to be 2.3 a value greater than one (>>1). This makes non-carcinogenic effects significant to the population and poses serious effects in the area under study. The total excess life cancer risk were found to be (5.0 x ...
Asian Journal of Advanced Research and Reports, 2020
This study has established local diagnostic reference levels (LDRLs). Dose report and scan parame... more This study has established local diagnostic reference levels (LDRLs). Dose report and scan parameters for abdomen was assessed during the period of seven months at the three study centres. Data on CT Dose index (CTDIw) and dose length product (DLP) available and achieved on CT scanner control console was recorded for a minimum of 10 average sized patients for each facility to established a local Diagnostic reference level (LDRLs) and radiation dose optimization Data was collected using a purposive sampling technique, from 131 adult patients weighing 70±3 kg) from Philip brilliance, Toshiba Alexion and General Electric (GE) CT scanners for this study. Third quartile values of the estimated LDRLs for CTDIw and DLP was determined as 12.7 mGy and 560 mGy*cm. The mean CTDIw obtained are lower to the reported data from the European Commission of 35 mGy. The mean DLP are comparably lower than all the reported value from the European commission of 780 mGy/cm. Therefore, there is no any clin...