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Neutron activation analysis of ceramic tiles and its component and radon exhalation rate

Journal of Environmental Sciences 2004年第1期16卷 94-99页

作者： A.El-Shershaby A.sroor F.Ahmed A.S.Abdel-Haleem Z.Abdel Nuclear Physics Laboratory Faculty of WomenAin-Shams UniversityNuclear Physics LaboratoryFaculty of WomenAin-Shams UniversityIonizing Radiation DepartmentNational Institute for StandardsHot Laboratories CenterAtomic Energy AuthorityNuclear Physics LaboratoryFaculty of WomenAin-Shams University Cairo EgyptCairo EgyptGiza EgyptCairo EgyptCairo Egypt

The concentrations of 20 trace elements in several ceramics tiles and ceramic composites used in Egypt were elementally analyzed by neutron activation analysis(NAA) technique. The samples and standard were irradiated with reactor for 4 h(in the Second Research Egyptian Reactor(Et-RR-2)) with thermal neutron flux 5.9×10 13 n/(cm 2·s).The gamma-ray spectra obtained were measured for several times by means of the hyper pure germanium detection system(HPGe). Also a solid state nuclear track detector(SSNTD) CR-39, was used to measure the emanation rate of radon for these samples. The radium concentrations were found to vary from 0.39—3.59 ppm and the emanation rates were found to vary from (0.728—5.688) × 10 -4 kg/(m 2· s).The elemental analysis of the ceramic tiles and ceramic composites have a great importance in assigning the physical properties and in turn the quality of the material.

关键词： ceramic neutron activation analysis(NAA) radon emanation solid state nuclear track detector(SSNTD)

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Radiological Hazards for marble and Granite Used at Shak El Thouban Industrial Zone in Egypt

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Journal of Environmental Protection 2013年第12期4卷 41-48页

作者： Amany T. sroor Saher m. Darwish Samia m. El-Bahi mohamed G. Abdel Karim Nuclear Physics Laboratory Faculty of Girls Ain Shams University Cairo Egypt Physics Department Faculty of Science Cairo University Giza Egypt

The background level of radiation in the natural environment surrounds us at all times. Levels of natural occurring radioactivity in marble and granite used at Shak El Thouban industrial zone in Cairo, Egypt have been investigated using HPGe detector through gamma-ray spectrometry. The activity concentration of radionuclides in the 238U-, 232Th-series and 40K has been determined. The average activity concentration of 238U, 232Th and 40K for marble samples was 23.77 Bq/kg ranged from (10.91 to 45.4), 10.75 Bq/kg ranged from (5.46 to 23.61) and 520.43 Bq/kg ranged from (382.30 to 1132.41), respectively. The 238U, 232Th and 40K activity concentration for granite samples were 54.31 Bq/kg ranged from (12.04 to 106.34), 113.57 Bq/kg ranged from (23.91 to 270.36) and 7867.51 Bq/kg ranged from (2017.60 to 11436.91), respectively. Concerning the radiological risk, the radium equivalent activity, external and internal radiation hazard indices, the radiation level index and absorbed dose rate were evaluated. The mass exhalation rates of 222Rn and emanation coefficient have been also calculated. The mass exhalation rate of radon was found to be from 14.86 to 137.13 and 16.48 to 155.26 μBq/kg·s for marble and granite samples, respectively. The mean values of the specific activity of 226Ra, activity of 238U before and after sealing time and the mass exhalation rate of radon for granite samples are twice that for marble samples. All radiological indices and the mass exhalation rate of radon are lower than the permissible levels for building material in all marble samples, while all granite samples are higher and unsafe and pose a risk to the workers and users of these products due to the emanation of radon that may accumulate by time, especially in closed spaces.

关键词： Radiological Hazards marble Granite HPGe Detector Shak El Thouban

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Natural Radioactivity Assessment and Radiological Hazards in Soils from Qarun Lake and Wadi El Rayan in Faiyum, Egypt

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Open Journal of Soil Science 2013年第7期3卷 289-296页

作者： Saher m. Darwish Samia m. El-Bahi Amany T. sroor Najat F. Arhoma Nuclear Physics Laboratory Ain Shams University Fac- ulty of Girls Heliopolis Cairo Egypt. Physics Department Faculty of Science Cairo University Giza Egypt Physics Department Faculty of Science Cairo University Giza Egypt

The activity concentrations of naturally occurring 238U, 232Th and 40K in surface soils along Qarun Lake and Wadi El Rayan located in Faiyum, Egypt were determined. The measurements were carried out through gamma-ray spectrometry using a coaxial HPGe detector. The results were compared with those reported in the literature. The radiological hazard radium-equivalent activity index, external and internal indices, radioactivity level index, absorbed dose rate, annual effective dose rate and total absorbed dose rate associated with radioactivity in all samples were evaluated and compared with recommended values. Correlation studies between pairs of radionuclides were performed and discussed.

关键词： Natural Radioactivity Radiological Hazards HPGe Detector Gamma-Ray Spectrometry

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XRF Analysis of Heavy metals for Surface Soil of Qarun Lake and Wadi El Rayan in Faiyum, Egypt

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Open Journal of metal 2013年第2期3卷 21-25页

作者： Samia m. El-Bahi Amany T. sroor Najat F. Arhoma Saher m. Darwish Nuclear Physics Laboratory Faculty of Girls Ain Shams University Heliopolis Egypt Physics Department Faculty of Science Cairo University Giza Egypt

The environmental pollution with some heavy metals for twenty four surface soil samples collected from Qarun Lake and Wadi El Rayan region in Faiyum, Egypt utilizing X-ray fluorescence (XRF) spectroscopy was measured. The concentrations of 13 elements Cr, Ni, Cu, Zn, Zr, Rb, Y, Ba, Pb, Sr, Ga, V and Nb were determined. The elemental concentrations were compared with the normal values and other studies in different locations from the world. The correlation between elements appears that pollution inside the investigated lake and Wadi result from different sources of contamination present inside them. The results establish a database reference of radioactivity background levels around these regions.

关键词： XRF Heavy metals Surface Soil Faiyum

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Accumulation of heavy metals in two crop seeds due to soil contamination as determined by neutron activation analysis techniques

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Journal of Environmental Sciences 1998年第2期10卷 118-124页

作者： m.F.Abdel Sabour Soil and Water Department, Nuclear Research Center, Cairo, Egypt A.S.Abdel Haleem Hot Lab’s Center, Atomic Energy Authority, Cairo, Egypt A.sroor, N.Abdel Baset Nuclear Physics Lab, Girls Faculty, Ain Shams University, Egypt R.A.Zaghloul mubarak City for Scientific Research and Technology, Egypt

Samples of two crop seeds (corn and sesame) grown on different contaminated soil sources were collected and prepared for neutron activation analysis. Soil contamination sources were organic waste compost applied to soil amendments namely, sewage sludge(Bs) and municipal solid waste (mSW) at 4%, 6% and 8% respectively. The non destructive NAA technique was used to determine some trace elements accumulation in plant seeds. Results revealed that increasing rate of tested organic waste resulted in dramatic increase in tested heavy metals levels in seeds(i.e., Fe, Zn, Co, Cr, Sc and Hg). Sesame seeds showed higher affinity to accumulate trace elements than corn grains in most tested elements. moreover, mSW addition enhanced the accumulation of tested metals in seeds more than Bs compost.

关键词： heavy metals crop seeds neutron activation analysis techniques.

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