Environmental Ionizing Radiation Survey of Quarry Sites in Ilorin Industrial Area, Nigeria

Nwankwo, LI; Akoshile, CO; Alabi, AB; Ojo, OO; Ayodele, TA

doi:10.4314/njbas.v22i1.1

Cited by 6 publications

(7 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All the sampling points recorded higher exposure rate except for location 24. The mean value of the exposure rate exceeded the ICRP recommended value of 0.013 mRh -1 and also the equivalent dose value of 2.21 mSvy -1 obtained in this study is higher than the equivalent dose value of 1.49 ±0.04 mSvy -1 obtained by Nwankwo, et al [23] in quarry sites in Ilorin.…”

Section: Resultscontrasting

confidence: 81%

“…According to the international commission on radiological protection (ICRP) [24], dose limits are intended to serve as a boundary condition that will prevent deterministic effect and limit the probability of stochastic effects. Stochastic effects are cancer inducing or heritable effects involving the development of cancer and may occur in either mature somatic cells or through mutation of germ (reproductive) cells while deterministic effects which are often of an acute nature are mostly the result of death or malformation of somatic cells following radiation exposure and only appear if the radiation dose exceeds a threshold value [23]. Consequently the limit for occupational workers are 20 mSvy -1 averaged over a period of five years.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Radiometric Survey of Granitic Quarry Site of Ebony State, Nigeria

Onwuka

Ononugbo

2019

AIR

View full text Add to dashboard Cite

Radiometric survey of the granitic quarry site at Ishiagu and its environment was done using two radiation monitors and geographical positioning system (GPS) for GIS mapping. In-situ measurement of exposure rate was carried out following the international standard organizational standard between May 2018 and June 2019. The measured average exposure rates ranged from 0.010± 0.002 to 0.038 ± 0.003 mRh-1 with mean value of 0.026 ±0.005 mRh-1. The estimated outdoor absorbed dose rate ranged from 87.0 to 330.6 nGyh-1 with mean value of 228.38 nGyh-1. The equivalent dose rate ranges from 0.84 to 3.20 mSvy-1 with mean value of 2.21 mSvy-1. The mean annual effective dose equivalent (AEDE) calculated was 0.28 mSvy-1 while the mean excess lifetime cancer risk (ELCR) was 0.98 x 10-3. The estimated annual effective dose to different organs showed that the testes have the highest annual effective dose of 0.191 mSvy-1 followed by ovaries and kidney of 0.135 and 0.139 mSvy-1 respectively while the liver has the lowest annual effective dose of 0.103 mSvy-1. The radiation contour map of the area showed the distribution of radiation of high and low areas. The result showed that the radiation exposure rate and its associated radiological risk parameters exceeded the safe limits prescribed by ICRP and also the values reported in literatures. However, these values may not constitute acute health risk but long term exposure of residents and workers may be detrimental to their health. Therefore adequate monitoring of this quarry site is necessary to checkmate the exposure rate and provide some protective measures for quarry workers.

show abstract

Section: Resultscontrasting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Radiometric Survey of Granitic Quarry Site of Ebony State, Nigeria

Onwuka

Ononugbo

2019

AIR

View full text Add to dashboard Cite

show abstract

“…Aliyu and Ramli [10], reported that nearly 80% of the annual effective dose attributed to radiation exposure originates from background ionizing radiation, which is predominantly produced by cosmogenic and primordial radionuclides. Areas of high background ionizing radiations are Kerala (India), Guarapari (Brazil), Yangjiang (China), and Ramsar (Iran), a northern coastal city in Iran and radon prone areas receive radiation doses that are higher than the doses in the normal background radiation areas (NBRAs).Excessive exposure of residents and workers of the nearby coastal communities to ionizing radiation could result to health side effects such as lung cancer, eye cataracts, skin erythema and mental retardation in children whom their mothers were exposed to radiation during pregnancy [11,12]. Ovuomarie-kevin, et al [11], evaluated health risks from exposure to low levels of ionizing radiation in some oil spilled communities of Rivers State, Nigeria and concluded that the chance of contracting cancer by residents of the study is low and the effective dose from present exposure rate to the adult organs investigated was insignificant.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Background Ionizing Radiation Level of Selected Oil Spill Communities of Delta State, Nigeria

Audu

Avwiri

Ononugbo

2019

CJAST

View full text Add to dashboard Cite

Study of the terrestrial Background Ionizing Radiation levels of selected Oil Spill Communities of Delta State, Nigeria have been carried out using Digilert 200 and Radalert 100 nuclear radiation monitor and a geographical positioning system (Garmin GPSMAP 76S). The exposure rates of the five communities ranges from 0.016 to 0.030 at Jones Creek, 0.014 to 0.034 at Opuwade Community, 0.015 to 0.037 at Okpare community, 0.007 to 0.029 at OtuJeremi community and 0.011to 0.040 at Otor-Edo community. The obtained mean exposures rates were higher than ICRP standard limit of 0.013. The absorbed dose rates calculated ranged from 139.2 to 261 (Jones Creek), 121.8 to 259.8 nGyh-1 (Opuwade Community), 130.5 to 321.9 nGyh-1 (Okpare community), 60.9 to 252.3 nGyh-1 (OtuJeremi community) and 95.9 to 348 nGyh-1 (Otor-Edo community). The estimated annual effective dose equivalent varies from 0.21 to 0.40 , 0.19 to 0.45 , 0.20 to 0.49 , 0.09 to 0.39 and 0.15 to 0.53 for Jones Creek, Opuwade Community, Okpare community, Otu Jeremi community and Otor-Edo community respectively while the excess lifetime cancer risk calculated for Jones Creek varies from (0.75 to 1.40) x 10-3, Opuwade community (0.65 to 1.59 )×, Okpare community (0.70 to 1.73 ) x , OtuJeremi community (0.33 to 1.35)× and Otor-Edo community (0.51 to 1.87)×. All the mean values of absorbed dose, annual effective dose and excess lifetime cancer risk exceeded their recommended safe values. The results obtained in this work may not constitute any immediate health risk to the residents of the selected oil spill communities but long term exposure in the area may lead to detrimental health risks.

show abstract

“…These studies reveal that the radioactive particles may reveal a variation in the radiation level in the surroundings depending on geographical and local geological factors of the concerned study area [ 29 , 30 ]. The rise in degree of ionizing radiation may be ascribed to the quarrying activities which can raise the natural background radiation levels by letting out a buried materials containing naturally occurring radioactive materials onto the surface of the environment [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. However, most of the quarry sites selected for this study had their annual radiation exposure above the normal acceptable annual limits of 1 mSv for the general public set up by the International Commission for Radiological Protection (ICRP)and World Health Organization (WHO), while very few of the quarries had their exposure levels below the standard.…”

Section: Discussionmentioning

confidence: 99%

Levels of ionizing radiations in selected quarries in Nyamira County, Kenya

Ruth

Warutere

Nyamari

et al. 2020

Heliyon

View full text Add to dashboard Cite

It has been shown through a survey by World Health Organization and International Commission on Radiological Protection that certain materials (stones) sourced from quarries and used for the building are radioactive. In Kenya, underground stones which are sourced from embedded rocks are used in construction of most of the permanent buildings, yet Kenya has not adequately radio-profiled sources of building materials to determine whether the construction materials contain radionuclides that emit ionizing radiations yet are used for building. Consequently, Kenyans could be at risk of exposure to high levels of ionizing radiations by living in stone houses that are not radio-profiled. Health problems arise due to subjection to ionizing radiations. The study determined the levels of ionizing radiations in sampled quarries in Nyamira County by using Radiological survey dosimeters to show the radiation readings in milliRoentgen/hr then converted to milliSievert per year and the Global Positioning System device took note of the quarries' geographical positions. The study used Minitab version 17.0 software to establish the statistical differences of degree of exposure in sampled quarries. The sample size for the study was 40 quarries. It was revealed that Q-073 and Q-075 both had the lowest radiation readings of 0.64mSv while Q-079 had the highest reading of 3.46mSv equal to a deviation from WHO approved threshold of -35.71%,-36.29% and 245.7%, respectively. The results indicated that 89% of the sampled quarries had radiation emissions above the ICRP and WHO standard. However, within Borabu Sub County, only 5 and within Manga Sub-County 4 of the sampled quarries had radiation readings below ICRP and WHO recommended standards of 1mSv/yr. It was exhibited from the study results that there are higher levels of ionizing radiations in quarries going past recommended standards per year hence causing health risk to quarry workers and general public. Therefore, these results could guide in formation of the national construction policies by including regular surveying for the levels of ionizing radiation in building materials as well as in practicing appropriate mitigation strategies.

show abstract

Environmental Ionizing Radiation Survey of Quarry Sites in Ilorin Industrial Area, Nigeria

Cited by 6 publications

References 6 publications

Radiometric Survey of Granitic Quarry Site of Ebony State, Nigeria

Radiometric Survey of Granitic Quarry Site of Ebony State, Nigeria

Evaluation of Background Ionizing Radiation Level of Selected Oil Spill Communities of Delta State, Nigeria

Levels of ionizing radiations in selected quarries in Nyamira County, Kenya

Contact Info

Product

Resources

About