14 research outputs found
Assessment of Gamma-Radiation Levels in Selected Oil Spilled Areas in Rivers State, Nigeria
A prelude radiological impact assessment of oil spillage on the oil spilled environment, those saddled with the responsibility of cleaning the spilled crude and the host/nearest communities residents in Rivers State Nigeria has been examined in-situ, using radiation meters (Digilert 100 nuclear radiation meter) and a geographical positioning system (GPS). Readings were taken twice in a month for three months in the five different oil spilled site and one measurement taken at a control site where there is no oil spillage but within oil bearing community. The average radiation values in all the oil spilled site is 0.019±0.006mRh-1, this is far above the 0.011±0.003mRh-1obtained for the control and ICRP 0.013±0.005mRh-1 world background levels. The average equivalent dose rate obtained in all the five studied site is 1.6mSvy-1 while the dose rate in the control is 0.93mSvy-1. The results showed that all the oil spilled sites yearly equivalent dose rate exceeded the 1mSvy-1 maximum permissible limit recommend for the public and non-nuclear industrial environment by International Council on Radiological Protection (ICRP,1999). All the oil spilled environment radiation levels exceeded the normal world average BIR level of 0.013mRh-1and other reported values in similar environment. This shows that the oil spilled environment have been impacted radiologically. This will pose some long-term health side effects on the clean-up workers and residents of the host communities. Interim proactive measures are recommended while further and a detail study is ongoing
Gross \u3b1 and \u3b2 Activity Concentration and Estimation of Adults and Infants Dose intake in Surface and Ground Water of Ten Oil Fields Environment in Western Niger Delta of Nigeria
The oil and gas rich Niger Delta region of Nigeria is characterized by
environmental degradation leading to environmental pollution from oil
and gas activities. This study examined the gross \u3b1 and \u3b2
activity in thirty (river/stream, well and tap) water samples collected
from ten oil fields in the Western Niger Delta region of Nigeria. The
counting system employed in this analysis is the Gas-flow proportional
counter {Eurisys Measure IN20 low- background multiple (eight) channel
counter}. Gross alpha activity concentration range from 0.01\ub10.002
to 0.7\ub10.01 (0.15\ub10.003) Bql-1, 0.01\ub10.003 to
0.5\ub10.01 (0.1\ub10.003)Bql-1 and 0.02\ub10.001 to
35.1\ub11.1 (4.1\ub10.1) Bql-1 while beta activity concentration
ranged from 1.1\ub10.04 to 13.2\ub10.1 (6.0\ub10.1) Bql-1,
0.7\ub10.1 to 54.7\ub11.3 (8.9\ub10.2)Bql-1 and 0.7\ub10.03 to
151.2\ub11.8 (40.1\ub10.9)Bql-1 for well, tap and river waters
respectively. Correlation value between \u3b1 and \u3b2 activities in
well, tap and river water is 0.025, 0.047 and 0.512 respectively. The
results show that except for the alpha activity in the tap water
samples, the average natural activity concentrations of \u3b1- and
\u3b2-emitting radionuclides in the samples are slightly above the WHO
recommended limit. For all samples the gross \u3b2 activities are
higher than the corresponding gross \u3b1 activities. The mean
effective equivalent dose intake per year due to alpha activity in the
water samples for adults and infants are: 76.4\ub11.8 and
20.9\ub155\u3bcSvy-1, 54.6\ub11.3 and 14.9\ub10.4\u3bcSvy-1,
and 2118\ub170 and 584\ub119.2\u3bcSvy-1 in well, tap, and river
water samples respectively. The results obtained for dose intake are
below the WHO recommended reference level of 0.1mSvy-1, except for the
water sample from Uzere river. This study indicates that the water
sources evaluated, especially the rivers, are contaminated
radiologically. @JASE
Radiological impact of oil and Gas Activities in selected oil fields in Production Land Area of Delta State, Nigeria
A study of the radiological impact of oil and gas exploration
activities in the production land area of Delta State has been carried
out in-situ using two synchronized and calibrated radiation meters
(Digilert 50 and 100) and a geographical positioning system (GPS). Ten
oil field facilities were studied. At each facility, nine sampling
locations and their host communities were evaluated making a total of
100 study points. Measured exposure rate in the oil field facilities
ranged from 0.011\ub10.003mRh-1 in Evwreni camp site to
0.031\ub10.01mRh-1 at the Otorogu gas plant. Mean field exposure
rates/equivalent dose rates ranged from
0.016\ub10.006mRh-1(0.839\ub10.34mSvy-1) to
0.0213\ub10.008mRh-1(1.134\ub10.44mSvy-1). In the host communities
the values ranged from 0.0115\ub10.003mRh-1 (0.612\ub10.16mSvy-1)
in Evwreni community to 0.021\ub10.007mRh-1 (1.117\ub10.37mSvy-1)
in Otujeremi town, while for the control study area the value obtained
was 0.009\ub10.002mRh-1(0.479\ub10.11mSvy-1). The results show that
the radiation levels for the Ughelli East, Kokori, Eriemu, Evwreni,
Eriemu, Oweh, Olomoro-Oleh oil and gas fields are within the 1mSvy-1
maximum permissible limit recommended for the public and non-nuclear
industrial environment, while the levels for the fields at Otorogu,
Ughelli West, Afiesere and Uzere West and East and the host communities
of Olomoro, Uzere and Emeragha exceeded the maximum recommended value,
an indication that the oil fields and host communities environment have
been impacted radiologically. However, these results obtained may not
have immediate health hazard, but will pose some long-term health side
effects on the staff working in the facilities and residents of the
host communities. Interim proactive measures are recommended @JASE
Gross α and β Activity Concentration and Estimation of Adults and Infants Dose intake in Surface and Ground Water of Ten Oil Fields Environment in Western Niger Delta of Nigeria
The oil and gas rich Niger Delta region of Nigeria is characterized by
environmental degradation leading to environmental pollution from oil
and gas activities. This study examined the gross α and β
activity in thirty (river/stream, well and tap) water samples collected
from ten oil fields in the Western Niger Delta region of Nigeria. The
counting system employed in this analysis is the Gas-flow proportional
counter {Eurisys Measure IN20 low- background multiple (eight) channel
counter}. Gross alpha activity concentration range from 0.01±0.002
to 0.7±0.01 (0.15±0.003) Bql-1, 0.01±0.003 to
0.5±0.01 (0.1±0.003)Bql-1 and 0.02±0.001 to
35.1±1.1 (4.1±0.1) Bql-1 while beta activity concentration
ranged from 1.1±0.04 to 13.2±0.1 (6.0±0.1) Bql-1,
0.7±0.1 to 54.7±1.3 (8.9±0.2)Bql-1 and 0.7±0.03 to
151.2±1.8 (40.1±0.9)Bql-1 for well, tap and river waters
respectively. Correlation value between α and β activities in
well, tap and river water is 0.025, 0.047 and 0.512 respectively. The
results show that except for the alpha activity in the tap water
samples, the average natural activity concentrations of α- and
β-emitting radionuclides in the samples are slightly above the WHO
recommended limit. For all samples the gross β activities are
higher than the corresponding gross α activities. The mean
effective equivalent dose intake per year due to alpha activity in the
water samples for adults and infants are: 76.4±1.8 and
20.9±55μSvy-1, 54.6±1.3 and 14.9±0.4μSvy-1,
and 2118±70 and 584±19.2μSvy-1 in well, tap, and river
water samples respectively. The results obtained for dose intake are
below the WHO recommended reference level of 0.1mSvy-1, except for the
water sample from Uzere river. This study indicates that the water
sources evaluated, especially the rivers, are contaminated
radiologically. @JASE
Radiological impact of oil and Gas Activities in selected oil fields in Production Land Area of Delta State, Nigeria
A study of the radiological impact of oil and gas exploration
activities in the production land area of Delta State has been carried
out in-situ using two synchronized and calibrated radiation meters
(Digilert 50 and 100) and a geographical positioning system (GPS). Ten
oil field facilities were studied. At each facility, nine sampling
locations and their host communities were evaluated making a total of
100 study points. Measured exposure rate in the oil field facilities
ranged from 0.011±0.003mRh-1 in Evwreni camp site to
0.031±0.01mRh-1 at the Otorogu gas plant. Mean field exposure
rates/equivalent dose rates ranged from
0.016±0.006mRh-1(0.839±0.34mSvy-1) to
0.0213±0.008mRh-1(1.134±0.44mSvy-1). In the host communities
the values ranged from 0.0115±0.003mRh-1 (0.612±0.16mSvy-1)
in Evwreni community to 0.021±0.007mRh-1 (1.117±0.37mSvy-1)
in Otujeremi town, while for the control study area the value obtained
was 0.009±0.002mRh-1(0.479±0.11mSvy-1). The results show that
the radiation levels for the Ughelli East, Kokori, Eriemu, Evwreni,
Eriemu, Oweh, Olomoro-Oleh oil and gas fields are within the 1mSvy-1
maximum permissible limit recommended for the public and non-nuclear
industrial environment, while the levels for the fields at Otorogu,
Ughelli West, Afiesere and Uzere West and East and the host communities
of Olomoro, Uzere and Emeragha exceeded the maximum recommended value,
an indication that the oil fields and host communities environment have
been impacted radiologically. However, these results obtained may not
have immediate health hazard, but will pose some long-term health side
effects on the staff working in the facilities and residents of the
host communities. Interim proactive measures are recommended @JASE
Impact of produced water discharge on the gross alpha and gross beta activity concentrations and radiological health risk on drinking water sources in coastal areas of Nigeria
Cost-benefit analysis approach to risk assessment of natural radioactivity in powdered and liquid milk products consumed in Nigeria
Preliminary assessment of natural radioactivity and associated radiation hazards in a phosphate mining site in southern area of Togo
Determination of radioactivity levels in Akhisar, Gordes, Golmarmara and Sindirgi regions, Western Turkey
WOS: 000330780800008In this study, radioactivity measurements in the environment of Akhisar, Golmarmara, Gordes and Sindirgi regions in Western Turkey were investigated in order to evaluate the implications of any excess radioactivity in the environment of geological formation. The radioactivity concentrations of K-40, U-238 and Th-232 radionuclides in the soil samples were measured by a NaI(Tl) gamma spectrometer system, and the radium activity concentrations in the water samples were also analyzed by an ZnS(Ag) alpha counter by the collector chamber method. The radioactivity of K-40, U-238 and Th-232 in soils ranged 2.80-2,347.77, 9.90-256.19 and 9.66-106.53 Bq kg(-1), respectively. The activity of Ra-226 in the water samples ranged from 0.03 Bq L-1 (0.89pCi/L) to 0.80 Bq L-1 (21.58pCi/L). In addition, the external terrestrial gamma dose rate in air (nGy h(-1)), annual effective dose rate (mSv year(-1)) and radium equivalent activity (Bq kg(-1)) were calculated and compared with international standard values.Celal Bayar University Scientific Research Projects Coordination (BAP)Celal Bayar University [2010/10]In this study, Celal Bayar University Scientific Research Projects Coordination (BAP) No. 2010/10 with the Project is supported