scholarly journals Teresterial Background Ionizing Radiation around Lead/Zinc Mining Site in Ishiagu, Ebonyi State, Nigeria

2021 ◽  
pp. 1-13
Author(s):  
C. Mgbeokwere ◽  
C. P. Ononugbo ◽  
A. Bubu
Keyword(s):  
Ionizing Radiation ◽  
The Body ◽  
Exposure Rate ◽  
Radiological Risk ◽  
Radiation Level ◽  
Mining Site ◽  
Mining Sites ◽  
Lead Zinc ◽  
Radiological Health ◽  
Risk Parameters

Background ionizing radiation around Lead/Zinc mining sites at Ishiagu, Ebonyi State was carried out using appropriate equipment. The background ionizing radiation of the environment was determined by measuring the radiation exposure rates using Radalert-200 and Geographical Positioning System (GPS). Radiological health parameters and effective dose to different organs of the body was estimated. The average exposure rate of 0.00017mSv/h (0.017mR/h) measured was relatively higher than the world acceptable value of 0.00013mSv/h (0.013mR/h ). All the radiological risk parameters estimated are relatively high. The result of this work shows that the mining µactivities have enhanced the radiation level of Ishiagu and health status of the populace.

Assessment of ionizing radiation exposure levels and associated health risk in some selected solid mineral mining sites Edo-North, Nigeria

2021 ◽  
Vol 19 (3) ◽  
pp. 153-166
Author(s):  
A.O. Eshiemomoh ◽  
G.O. Avwiri ◽  
C.P. Ononugbo
Keyword(s):  
Cancer Risk ◽  
Ionizing Radiation ◽  
Radiation Exposure ◽  
Dose Rate ◽  
Exposure Rate ◽  
Lifetime Cancer Risk ◽  
Entire Study ◽  
Mining Sites ◽  
The Mean ◽  
Ionizing Radiation Exposure

Ionizing radiation exposure rate and its associated health risks were assessed using Digilert 200 and Rados Radiation Monitoring Meter, integrated with Geographical Positioning System (Garmin GPSMAP 76S) of some selected solid mineral mining sites across Edo-North Nigeria. The mean exposure rates show some characteristic range of 0.010±0.005 𝑚𝑅ℎ𝑟−1 to 0.027 𝑚𝑅ℎ𝑟 −1 across the entire study. The obtained mean exposures rates at all the mining pits were higher than the ICRP standard limit of 0.013 𝑚𝑅ℎ𝑟 −1 , except at freedom limestonesmining pit where we recorded 0.010 mRh-1. It was also observed that limestones mining sites exhibited low exposure rate while granite mining sites exhibited high exposure rate. The computed equivalent dose rate ranges from 1.049 mSvy-1 to 2.287 mSvy-1 , which is well above the recommended permissible limit of 1.0 mSvy-1 for the general public. 91.7% of the mining sites recorded higher absorbed dose rate but the mean AEDE recorded across the entire study area are below the ICRP standard. The average excess lifetime cancer risk shows variation from 0.472 x 10-3 to 1.27 x 10-3 . . By this result, the probability of contacting cancer due to radiation exposure is higher in places like Cinoma pit, Cetraco pit, Niger-Cat pit, Jigom pit, Oaries pit and Petra-Quarries pit. Keywords: Assessment, Mining pits, Background, Exposure, lifetime cancer risk

scholarly journals Assessment of Activity Concentration of Radionuclides in Soil and Cassava Food Crop from Solid Mineral Mining Site in Ishiagu, Ivo L.G.A of Ebonyi State, Nigeria

2021 ◽  
pp. 1-13
Author(s):  
C. Mgbeokwere ◽  
C. P. Ononugbo ◽  
A. Bubu
Keyword(s):  
Activity Concentration ◽  
Gamma Ray ◽  
Gamma Ray Spectrometry ◽  
Measuring Instruments ◽  
Mining Sites ◽  
Mineral Mining ◽  
Effective Doses ◽  
Radiological Health ◽  
Risk Parameters ◽  
Cassava Crop

The assessment of activity of concentration of radionuclides in soil and food crops from solid mineral mining sites at Ishiagu, in Ivo L.G.A of Ebonyi State was carried out using the necessary measuring instruments. Samples of soil and cassava crop collected from around the mining sites. The samples were analysed using gamma ray spectrometry. The average activity concentration of 226Ra, 232Th and 40K in soil samples were 12.37,16.08, and 144.29 Bqkg-1 while those for cassava were 2.81, 16.80, and 205.41 Bqkg-1. The soil/plant radionuclide transfer ratio estimated are 0.62, 2.43 and 2.51 for 226Ra, 232Th and 40K, respectively. All the radiological risk parameters estimated are relatively low. The result of this work showed that the obtained results for all samples were lower than the international accepted limit. Hence, from radiological health standpoint, the obtained values of effective doses may not pose significant threat to both human and the environment. 

scholarly journals Levels of heavy metals in soils and food crops cultivated within selected mining sites in Ebonyi State, Nigeria

2021 ◽  
Vol 2 (1) ◽  
pp. 84-95
Author(s):  
David Okechukwu Okeke ◽  
◽  
Jonathan Chinenye Ifemeje ◽  
Keyword(s):  
Heavy Metals ◽  
Control Site ◽  
Soil Samples ◽  
World Health ◽  
Food Crops ◽  
Food Crop ◽  
Mining Site ◽  
Mining Sites ◽  
Health Association ◽  
Health Organization

The level of heavy metals (Fe, Cu, As, Pb, Cd, Mg, Ca, Hg, Ni, Cr, Zn, Ag, Co, Mo, Se and Al) in soils and food crops (okra, cassava and rice) cultivated within selected mining sites in Ebonyi State, Nigeria were determined using FS240AA Atomic Absorption Spectrophotometer (AAS) according to the method of American Public Health Association (APHA). Soil samples were collected from Enyigba mining site, Ikwo mining site, AmeriAmekamining site, Izza mining site, MkpumeAkwatakwa mining site and MpumeAkwaokuku mining site while the food crop samples (okra, cassava and rice) were collected from the farmlands within the mining sites. Control samples were collected 500m away from the mining destinations were there was no evidence of mining activities on the soils. A total of sixty sub-samples and six control soil samples were collected for this study. Generally, the values of all the heavy metals analyzed for soil and food crop samples were higher than the values recommended by the World Health Organization (WHO), and those from the control site suggesting possible mobility of the metals from mining sites to farmlands through leaching and runoffs. The findings in this study also revealed that the food crops contain heavy metals exceeding the maximum permissible concentration, and could be detrimental to human health when they are consumed.

Increased mitochondrial DNA4977-bp deletion in catheterization laboratory workers with long-term low-dose exposure to ionizing radiation

2019 ◽  
Vol 26 (9) ◽  
pp. 976-984 ◽  
Author(s):  
Andrea Borghini ◽  
Cecilia Vecoli ◽  
Emanuela Piccaluga ◽  
Giulio Guagliumi ◽  
Eugenio Picano ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Risk Score ◽  
Nuclear Dna ◽  
High Volume ◽  
Multiple Regression Model ◽  
Mtdna Copy Number ◽  
Radiological Risk ◽  
High Exposure ◽  
Catheterization Laboratory ◽  
Mtdna Mutations

Aims Ionizing radiation may lead to mitochondrial DNA (mtDNA) mutations and changes in mtDNA content in cells, major driving mechanisms for carcinogenesis, vascular aging and neurodegeneration. The aim of this study was to investigate the possible induction of common mitochondrial deletion (mtDNA4977) and mtDNA copy number (mtDNA-CN) changes in peripheral blood of personnel working in high-volume cardiac catheterization laboratories (Cath Labs). Methods A group of 147 Cath Lab workers (median individual effective dose = 16.8 mSv, for the 41 with lifetime dosimetric record) and 74 unexposed individuals were evaluated. The occupational radiological risk score was computed for each subject on the basis of the length of employment, individual caseload and proximity to the radiation source. mtDNA4977 deletion and mtDNA-CN were assessed by using quantitative real-time polymerase chain reaction. Results Increased levels of mtDNA4977 deletion were observed in high-exposure Cath Lab workers compared with unexposed individuals ( p < 0.0001). Conversely, mtDNA-CN was significantly greater in the low-exposure workers ( p = 0.003). Occupational radiological risk score was positively correlated with mtDNA4977 deletion (Spearman's r = 0.172, p = 0.03) and inversely correlated with mtDNA-CN (Spearman's r = –0.202, p = 0.01). In multiple regression model, occupational radiological risk score emerged as significant predictor of high levels of mtDNA4977 deletion (ß coefficient = 0.236, p = 0.04). Conclusion mtDNA4977 deletion is significantly high in Cath Lab personnel. Beyond the well-recognized nuclear DNA, mtDNA damage might deserve attention as a pathogenetic molecular pathway and a potential therapeutic target of ionizing radiation damage.

PRELIMINARY STUDY OF RIVER WATER IN GOLD MINING AREAS OF CAMBODIA

2004 ◽  
Vol 14 (03n04) ◽  
pp. 109-114
Author(s):  
SATOSHI MURAO ◽  
FUMITAKA NISHIYAMA ◽  
SOTHAM SIENG
Keyword(s):  
Gold Mining ◽  
Mineral Resources ◽  
Computer Code ◽  
External Beam ◽  
Social Concern ◽  
Mining Site ◽  
Mining Sites ◽  
Mining Areas ◽  
Preliminary Study ◽  
The University

In Cambodia, artisanal mining has recently come to a social concern because of the possibility to cause environmental degradation and human health problems. The General Department of Mineral Resources of Cambodia is collecting environmental specimens in mining sites to watch the situation. This time, four water samples from Sampov Loon and one from Memong mining site were sent from the Department to Hiroshima University, Japan, and the samples were analyzed by means of PIXE at the University. A volume of 10 μl from each sample was separated and dropped onto 4 μm polypropylene backing foil. The measurement was carried out by using 2.5 MV single-ended Van de Graaff accelerator. A Si(Li) detector (active area, 80mm2; sensitive depth, 5mm; Be -window's thickness, 25 μm; resolution, 167 eV fwhm at 5.9 keV) was used for both of in vacuo PIXE and non-vacuum external beam PIXE measurement. A computer code PIXS was used for the quantification. The result indicates that there are at least two kinds of water in Sampov Loon and one of them possibly represents polluted condition.

Microwave measurements of ionizing radiation exposure rate

1978 ◽  
Vol 45 (5) ◽  
pp. 1098-1100
Author(s):  
Yu. A. Medvedev ◽  
N. N. Morozov ◽  
B. M. Stepanov
Keyword(s):  
Ionizing Radiation ◽  
Radiation Exposure ◽  
Microwave Measurements ◽  
Exposure Rate ◽  
Ionizing Radiation Exposure

SOMATIC EFFECTS OF IONIZING RADIATION

1960 ◽  
Vol 38 (3) ◽  
pp. 326-330
Author(s):  
E. A. Sellers
Keyword(s):  
Ionizing Radiation ◽  
Dose Rate ◽  
Dose Response ◽  
Tissue Damage ◽  
Response Curve ◽  
Environmental Changes ◽  
Skin Surface ◽  
The Body ◽  
Tissue Dose ◽  
Effects Of Radiation

Radiation is similar to other environmental changes in that the response or injury produced bears a relationship to the degree of stimulus. A time–dose relationship also exists. It differs from other environmental changes in that many more cells of the body remote from the skin surface are affected. The effects depend on absorbed tissue dose and on dose rate. These dosage factors, the varying sensitivity of the tissues, and differing rates of repair account for the phasic pattern of symptoms and tissue damage which follow radiation. Compared with other stressors (especially chemical) the dose–response curve after radiation is steep. The somatic effects of radiation are the sequelae of the specific molecular injury produced by ionization rather than the primary lesions themselves.

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