Environmental pollutant isotope measurements and natural radioactivity assessment for North Tushki area, south western desert, Egypt

Sroor, A.; Afifi, S. Y.; Abdelhaleem, Amal; Salman, Abdel Aty B.; Abdel-Sammad, M

doi:10.1016/s0969-8043(02)00121-5

Cited by 26 publications

(7 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ra eq = C Ra + 1.43C Th + 0.077C K (4) where : C Ra , C Th and C K are the specific activities of 226 Ra, 232 Th and 40 K in Bq/kg [12,13]. The Sampled Farms…”

Section: Water Resultsmentioning

confidence: 99%

Natural Radioactivity Levels and the Corresponding Radiation Exposure in Agricultural Environment in Hail, KSA

El-Sharkawy¹,

Al-Muqren²

2018

Arab Journal of Nuclear Sciences and Applications

View full text Add to dashboard Cite

The natural radioactivity levels in groundwater, soil and crops have been determined in seven farms at Hail region in Saudi Arabia to assess any radiological hazards to the public, and to maintain a radiological map of natural radioactivity levels in this region. The radium isotopes (226 Ra and 228 Ra) were measured in groundwater samples collected from wells in these farms, and the 228 Ra activity concentrations exceeded the national guidance level of 2.7 pCi/L set by Saudi Arabian Standards Organization (SASO) and the WHO. These relatively higher activities did not contribute to the annual effective dose rate from the ingestion of both isotopes (226 Ra and 228 Ra) in the analyzed crops, which showed lower values than the upper limit of 1 mSv/yr. The activity concentrations of 228 Ra in soils of five farms were found to be higher than the world average value reported by the (United Nations Scientific Committee on the Effects of Atomic Radiation) UNSCEAR. These relatively higher activities contributed to the absorbed dose rate in air from external gamma radiation which was higher than the world average value of 57 nGy/hr in some farms. These high activities contributed also to the annual effective dose which showed values higher than the world average value of 0.07 mSv/yr for outdoor terrestrial gamma radiation in three farms. On the basis of these results, it can be concluded that the presence of such activities in the groundwater and crops samples do not pose any radiological hazards or significant risk to the public and animals, since they drink these waters. it may be recommended that the activity levels of the combined radium isotopes in the animal products (milk and meat) and the annual effective dose should be estimated to evaluate the contribution of the 228 Ra exceeded limits in these wells.

show abstract

“…Ra eq = C Ra + 1.43C Th + 0.077C K (4) where : C Ra , C Th and C K are the specific activities of 226 Ra, 232 Th and 40 K in Bq/kg [12,13]. The Sampled Farms…”

Section: Water Resultsmentioning

confidence: 99%

Natural Radioactivity Levels and the Corresponding Radiation Exposure in Agricultural Environment in Hail, KSA

El-Sharkawy¹,

Al-Muqren²

2018

Arab Journal of Nuclear Sciences and Applications

View full text Add to dashboard Cite

show abstract

“…Therefore, the total exposure to radiation from 226 Ra, 232 Th, and 40 K nuclides was expressed by radium equivalent activity (Ra eq ) in (Bq/kg). The radium equivalent activity in soil samples was calculated using the following formula [18,19]:…”

Section: Radium Equivalent Activity (Ra Eq )mentioning

confidence: 99%

Effect of Using Chemical Fertilizers on Natural Radioactivity Levels in Agricultural Soil in the Iraqi Kurdistan Region

Azeez¹,

Mansour²,

Ahmad³

2020

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

In this study, the effect of the use of chemical fertilizers on natural radioactivity levels in agricultural soil was investigated. For this purpose, virgin and agricultural (fertilized) soils were collected from Erbil city, the capital of the Iraqi Kurdistan Region. Gamma-ray spectrometry was applied using a high-purity germanium (HPGe) detector to determine the activity concentrations of 226 Ra, 232 Th, and 40 K in soil samples. The results showed that the range of activity concentrations for 226 Ra, 232 Th, and 40 K in virgin soils are (10.6-16.2) Bq/kg, (8.8-10.7) Bq/kg, and (241.8-340.9) Bq/kg, respectively, while the range of activity concentrations for 226 Ra, 232 Th, and 40 K in agricultural soils are (11.9-18.2) Bq/kg, (8.8-12.4) Bq/kg, and (247.7-338.3) Bq/kg, respectively. The obtained values of activity concentration show that the application of chemical fertilizers elevated the natural radioactivity level of the soil. The radiological hazard parameters were also calculated in both the virgin and agricultural soil samples and compared with the international dose safety limit in the soil.

show abstract

“…The external radiation hazard index (H ex ) due to the emitted gamma-rays from soil surface, also called the representative level index and was calculated from Equation 7, (Sroor, Afifi, Abdel-Haleem, Salman, & Abdel-Sammad, 2002).…”

Section: External Radiation Hazard Index (H Ex )mentioning

confidence: 99%

Depleted uranium residues, NORMs and 137Cs in the coastal zone soil of Musandam Peninsula, Hurmuz strait region, Sultanate of Oman

Saleh

2018

Journal of Radiation Research and Applied Sciences

View full text Add to dashboard Cite

Musandam peninsula located at one of the most important marine strait overlooking the Arabian/ Parisian Gulf. Environmentally, this area is characterized by its primitivistic status and vulnerable to any natural or manmade disturbances. This work presents the second phase of a comprehensive radiation measurement in Musandam Peninsula environment amid to investigating the presences of depleted uranium (DU) residues and assessing the current levels of 226 Ra, 228 Ra, 40 K and 137 Cs in surface soil of coastal area. For this purpose, thirty representative soil samples were collected and analyzed for 235 U using gamma rays spectrometry and for total U using ICP-OES techniques. Results revealed that the range of isotopic abundance of 235 U was (0.70%e0.77%) with an average of 0.72%, confirming the detected uranium is naturally originated from the geological formations of investigated soil. Additionally, the values of Th/U ratios were calculated to be ranged from 0.37 to 1.95 with an average of 1.5 indicating the dominant geological formations are metamorphic sedimentary rocks that contain low levels of Th. The averages of radioactivity levels of NORMs indicated 16.02 Bqkg À1 , 7.83 Bqkg À1 and 174.03 Bqkg À1 for 226 Ra, 228 Ra, and 40 K respectively. The average of areal concentrations for 137 Cs was 2481.5 Bqm À2 ranges from 1040 Bq/m 2 to 9225 Bqm À2. The total external annual effective dose from all measured radionuclides was 23 mSv 237 Cs contribution is 1% while 238 U, 232 Th series and 40 K radionuclides contributions are 32%, 28% and 39% respectively. Radium equivalent, external, and internal radiation hazard indices indicate no radiological anomaly.

show abstract

Environmental pollutant isotope measurements and natural radioactivity assessment for North Tushki area, south western desert, Egypt

Cited by 26 publications

References 7 publications

Natural Radioactivity Levels and the Corresponding Radiation Exposure in Agricultural Environment in Hail, KSA

Natural Radioactivity Levels and the Corresponding Radiation Exposure in Agricultural Environment in Hail, KSA

Effect of Using Chemical Fertilizers on Natural Radioactivity Levels in Agricultural Soil in the Iraqi Kurdistan Region

Depleted uranium residues, NORMs and 137Cs in the coastal zone soil of Musandam Peninsula, Hurmuz strait region, Sultanate of Oman

Contact Info

Product

Resources

About