Uranium Concentrations In Soil Samples Research Articles

Measurement of Uranium Concentration in Soil of Middle of Iraq using CR ?V 39 Track Detector

The aim of this research is to determine the uranium concentration in soil and water samples taken from different locations from the middle and south of Iraq using fission fragments track registration. Twelve samples of soil and water were taken from middle and South of Iraq. The nuclear reaction used as a source of nuclear fission fragments is U-235 (n.f) obtained by bombardment U-235with thermal neutrons from (Am-Be) neutron source with flux (5X103 n.cm-2.s-1). The concentration values were calculated by a comparison with standard samples recommended by IAEA.The results of the measurements show that the uranium concentration in soil samples were in Thekar (16.38 ppm), AL-Basra (16.1ppm) and (0.78 ppm) in Baghdad, from the results which show that this governorate were contaminated with depleted uranium after the Wars against Iraq . The uranium concentration in the water samples of Tigers river were in AL-Qurna (8.85 ?g/l) and in AL-Suwera (4.72 ?g/l).

Measurement of Uranium Concentration in Soil of Middle of Iraq using CR ?V 39 Track Detector

The aim of this research is to determine the uranium concentration in soil and water samples taken from different locations from the middle and south of Iraq using fission fragments track registration. Twelve samples of soil and water were taken from middle and South of Iraq. The nuclear reaction used as a source of nuclear fission fragments is U-235 (n.f) obtained by bombardment U-235with thermal neutrons from (Am-Be) neutron source with flux (5X103 n.cm-2.s-1). The concentration values were calculated by a comparison with standard samples recommended by IAEA.The results of the measurements show that the uranium concentration in soil samples were in Thekar (16.38 ppm), AL-Basra (16.1ppm) and (0.78 ppm) in Baghdad, from the results which show that this governorate were contaminated with depleted uranium after the Wars against Iraq . The uranium concentration in the water samples of Tigers river were in AL-Qurna (8.85 ?g/l) and in AL-Suwera (4.72 ?g/l).

Measuring Uranium in the Soil of Some Area in Missan Governorate/ Iraq

Concentrations of uranium were measured in this study for twenty soil samples from four areas with different depths (soil surface-20-40-60-80)cm .The study regions include Missan Governorate (Al-Iskan area,Al-Shibbana area ,Hai-Al Moualimin Al Jadied area ,Sector 30 area). The Uranium concentrations in soil samples measured by using fission tracks registration in (CR-39) track detector that caused by the bombardment of (U-283) with thermal neutrons from (241Am-Be) neutron source that has flux neutron thermal of (5 ×103 n cm-2 s-1). The concentrations values were calculated by a comparison with standard samples. Through out the result, it was found that averages of uranium concentrations in soil samples were as the following : Al - Iskan area (0.404 ± 2.765) ppm, Al - Shibbana area (0.432 ± 1.719) ppm, Hai - Al - Moualimin Al - Jadied (0.236 ± 2.320) ppm, Sector 30 area (2.158±0.631) ppm.

Measuring Uranium in the Soil of Some Area in Missan Governorate/ Iraq

Concentrations of uranium were measured in this study for twenty soil samples from four areas with different depths (soil surface-20-40-60-80)cm .The study regions include Missan Governorate (Al-Iskan area,Al-Shibbana area ,Hai-Al Moualimin Al Jadied area ,Sector 30 area). The Uranium concentrations in soil samples measured by using fission tracks registration in (CR-39) track detector that caused by the bombardment of (U-283) with thermal neutrons from (241Am-Be) neutron source that has flux neutron thermal of (5 ×103 n cm-2 s-1). The concentrations values were calculated by a comparison with standard samples. Through out the result, it was found that averages of uranium concentrations in soil samples were as the following : Al - Iskan area (0.404 ± 2.765) ppm, Al - Shibbana area (0.432 ± 1.719) ppm, Hai - Al - Moualimin Al - Jadied (0.236 ± 2.320) ppm, Sector 30 area (2.158±0.631) ppm.

Determination of Uranium in Rocks and Soils of South Cameroon by γ-ray Spectrometry

Analytical results of uranium concentration in rocks and soils collected in the area of Lolodorf of South Cameroon where a radiometric anomaly had been found by previous investigation are reported. The analysis has been carried out by γ-ray spectrometry using a Ge detector. Radioactivity concentration of 235U was determined by comparing peak count rates of samples with those of natural uranium standard sample. Radioactivity concentration of 238U was calculated from the 235U radioactivity concentration by assuming that the isotopic composition of 235U is 0.7200% of natural abundance. Difference of γ-ray self-absorption between the samples and uranium standard was accurately corrected by using a mass attenuation coefficient of samples and standard measured by using an external γ-ray source. The radioactivity concentrations in rocks ranged from 0.92±0.02 to 228±14Bq/kg(235U) and 20±5 to 4868±307Bq/kg(238U), while radioactivity concentrations in soils ranged from 3±1 to 63±2 Bq/kg(235U) and 71±19 to 1346±38 Bq/kg(238U). The γ-ray dose rates in air at 1m above the ground surface due to the high uranium concentration in soil samples were ranged from 33±9 to 622±18 nGy/h. The highest uranium concentration of about 0.04% in rock was found in the analysis. These results show that the uranium content in the studied areas is significantly high and the studied areas have a potential for uranium mining.

قیاس تراکیز الیورانیوم فی نماذج ترب بعض العیون الکبریتیةباستخدام کاشف الأثر النووی CR-39

A concentration of uranium was measured in this study for seventeen samples of soil distributed in three Sulphuric Spring addition other regions as a back ground on the Hit City in AL-Anbar Governorate. The uranium concentrations in soil samples measured by using fission tracks registration in (CR-39) track detector that caused by the bombardment of Uranium nuclei (U) with thermal neutrons from (241 Am-Be) neutron source that has flux of (5 ×103 n cm-2 s-1). The concentrations values were calculated by a comparison with standard samples. The results shows that the uranium concentrations in first spring varies from (1.564- 2.253 ppm), second sprin (1.797-1.979 ppm), while in third spring are (1.964-2.518 ppm), and the average uranium concentration in other regions (1.572ppm). The conclusionshows that the uranium concentration in Sulphuric Spring is relatively higher than back ground.

Measurement of uranium concentration in soil samples by two different methods

In the present work, uranium concentration was determined in 15 soil samples by using CR-39 nuclear track detector and NaI(Tl) gammaspectroscopy. Obtained data are compared.

Determination of uranium concentration in surface soil samples of Iran

The use of uranium-tipped antitank shells during the Iraq war (2003) caused serious concerns in Iran and the international media over possible contamination of the Iranian environment and consequent long-term health effects. After a shell explosion, uranium is discharged by fire into the air in the form of oxidised particles, which can be dispersed over a radius of several kilometres. Gamma ray spectrometry was used to determine uranium concentrations in soil samples collected from ten sites in Iranian sectors near the Iraqi border. All surface soil samples were taken from the top 5 cm from each site. The concentrations of 238U were assessed from 63 keV and 92 keV emissions of its first daughter nuclide, 234Th. To assess the isotopic ratio of 238U/235U, a secular equilibrium was ensured and the concentration of 235U under 186 keV was deduced. The 226Ra was determined through 295 keV and 352 keV gamma rays of 214Pb. The concentrations of 238U and activity ratios of 238U/235U were determined. The average of measurement activity ratio was 20.0, very close to the value of 21.5 for natural uranium, while the activity ratio of depleted uranium can be as high as 76.9. The analysis of ten surface soil samples from Iranian sites near the Iraqi border showed that uranium isotopes are in natural abundances.

Measurements of radon and uranium concentration in water and soil samples from East Anatolian Active Fault Systems (Turkey)

Different water samples collected from over the North and East Anatolian Fault Systems (NAFS and EAFS) were analyzed for radon concentration, effective radium content and radon exhalation rate using the closed-can technique which includes CR-39 passive detectors and also, annual effective dose have been calculated for the water samples. The uranium concentrations in soil samples were also determined by using NaI(Tl) gamma spectroscopic method. The measured maximum values of the effective radium and radon concentrations in the water samples were 270.5 and 3319.3 Bq / m 3 , respectively. However, radon exhalation rate in the water samples varied between 20.2 and 470.0 mBq / m 2 h. The uranium concentrations in soil samples varies between 12.4 ± 1.2 and 138.0 ± 6.1 Bq / kg . The highest annual effective doses obtained for radium and radon are 55.1 and 14.5 μ Sv / y , respectively.

Measurements of Natural Radioactivity in Some Water and Soil Samples of Punjab State, India

In the present investigation a nuclear track-etch technique using Solid State Nuclear Track Detectors was used to estimate the trace uranium concentration in water and soil samples collected from different sources and locations of the Amritsar and Bathinda cities of Punjab. The uranium concentration in the water samples collected from Amritsar was found to vary from 3.17 to 4.19 mg L 1 and in the Bathinda city it varied between 4.28 and 16.48 mg L 1. A lake sample, collected from the NFL water works site in Bathinda city had a uranium content of only 1.21 mg L 1 which was several times lower than those samples collected from hand-pumps and tube - wells from this area. The uranium concentration in soil samples of Amritsar city was found to vary from 0.61 to 1.27 ppm. In addition, soil samples from other cities of the Punjab were analysed using the Gamma-spectroscopic technique to determine 226Ra, 232Th and 40K concentrations in soil. The average values of the concentration of 1 respectively.

Geochemical investigations for uranium in some areas of Himachal Pradesh using solid state nuclear track detectors

Fission track technique has been used to estimate uranium concentration in the samples of soil, rock and plants collected from some areas of Bilaspur, Mandi and Kulu districts of Himachal Pradesh, India. Uranium concentration in soil samples has been found to vary from 2.16 to 22.50 ppm., in rock samples from 1.41 to 10.34 ppm and in plants from 0.55 to 2.73 ppm. The anomalous uranium values have been obtained in soil, rock and plant samples from Thagan Nala region of Kulu district.