Prof. Dr. Shaban Harb | South Valley University (original) (raw)
Papers by Prof. Dr. Shaban Harb
Page 1. On the human radiation exposure as derived from the analysis of natural and man-made radi... more Page 1. On the human radiation exposure as derived from the analysis of natural and man-made radionuclides in soils Vom Fachbereich Physik der Universität Hannover zur Erlangung des Grades Doktor der Naturwissenschaften Dr. rer. nat. genehmigte Dissertation von (M.Sc. ...
In the present study, The natural radioactivity in soil, phosphate, and building materials (sand,... more In the present study, The natural radioactivity in soil, phosphate, and building materials (sand, granite, marble, and limestone) were determined by using gamma ray spectrometer NaI (Tl) and MCA 1024. AlphaGUARD was used for radon exhalation rate. The data analyses were performed to determine 226 Ra, 232 Th and 40 K activity concentrations as well as 222 Rn exhalation rate. The radium equivalent activity (Raeq), external hazard index (Hex), absorbed dose rate and annual effective dose were varied from 71.66 to 9048.94 Bqkg -1 , 0.19 to 24.45, 34.48 to 4172.34 nGyh -1 and 0.04 to 5.12 mSvy -1 respectively in all samples. The mass and area exhalation rates were increased from 1.31±0.09 Bqkg -1 h -1 and 23.09±0.33 Bqm -2 h -1 , at 30 0 C, to 7.98±0.56 Bqkg - 1 h -1 and 141.11±1.52 Bqm -2 h -1 , at 60 0 C, respectively, for phosphate samples (grain size<80m). decay progeny) and the primordial radionuclide 40 K. The samples, were air dried at room temperature in open air to ensure th...
IEEE Transactions on Nuclear Science, 2000
Applied Water Science, 2022
Monitoring groundwater quality and analyzing geochemical processes are very crucial in dry enviro... more Monitoring groundwater quality and analyzing geochemical processes are very crucial in dry environments, especially in areas with intense agriculture and inadequate irrigation management systems. A total of forty-one groundwater samples were collected from the study area and analyzed for major ions chemistry. The results of the geochemical analyses are used to investigate the geochemical processes and make groundwater assessments. The hydrogeochemical characteristics of the groundwater samples revealed a highly mineralized Na+–Cl− water type, implying that the majority of the samples are chemically unfit for human consumption. Based on the water quality parameters analyzed for the groundwater samples collected in this study, such as sodium adsorption ratio (SAR), soluble sodium percentage (SSP), residual sodium carbonate (RSC), magnesium hazard (MH), permeability index (PI), and Kelley's ratio (KR), the suitability of groundwater samples for irrigation purposes is good to modera...
Environmental Forensics, 2020
AlphaGUARD radon gas analyzer and NaI (Tl) spectrometer were used to measure the concentration le... more AlphaGUARD radon gas analyzer and NaI (Tl) spectrometer were used to measure the concentration levels of 222Rn and, 226Ra, 232Th, and 40K respectively in 109 groundwater samples collected from four different districts in Qena governorate, Egypt. The average values of the activity concentration were 3.57 ± 0.08, 0.54 ± 0.03, 0.40 ± 0.03, and 5.10 ± 0.44 Bql−1 for 222Rn, 226Ra, 232Th, and 40K, respectively. The average values of 222Rn, 226Ra, and 232Th are lower than, 100, 1, and 1 Bql−1, respectively, the WHO recommended permissible levels for drinking water. For radiation exposure assessment, the annual effective doses due to ingestion of 226Ra and 232Th and inhalation of 222Rn for adults were determined and compared with the reference limits. The annual effective doses due to ingestion 139.21–201.34 µSvy−1 are higher than the public annual dose limit 100 µSvy−1 recommended by WHO. These indicate that the ingestion of groundwater from the study areas might pose radiological health h...
World Journal of Nuclear Science and Technology, 2014
International Journal of High Energy Physics
Journal of Radioanalytical and Nuclear Chemistry, 2007
Radiation protection dosimetry, 2008
Radionuclides which present in different beach sands are sources of external exposure that contri... more Radionuclides which present in different beach sands are sources of external exposure that contribute to the total radiation exposure of human. In this work, superficial samples of beach sand were collected from the Red Sea coastline (Ras Gharib, Hurghada, Safaga, Qusier and Marsa Alam areas) and at 20 km on Qena-Safaga road. The distribution of natural radionuclides in sand beach samples was studied by gamma spectrometry. The activity concentrations of primordial and artificial radionuclides in samples that are collected from the coastal environment of the Red Sea were 19.2 +/- 3 Bq kg(-1) for (210)Pb, 21.1 +/- 1 Bq kg(-1) for (226)Ra, 22.7 +/- 2 Bq kg(-1) for (238)U, 1.0 +/- 0.1 Bq kg(-1) for (235)U, 11.6 +/- 1 Bq kg(-1) for (228)Ra, 13.0 +/- 1 Bq kg(-1) for (228)Th, 12.4 +/- 1 Bq kg(-1) for (232)Th, 930 +/- 32 Bq kg(-1) for (40)K and 1.2 +/- 0.3 Bq kg(-1) for (137)Cs. The mean external gamma-dose rate was 62.5 +/- 3.2 nSv h(-1), 54.4 +/- 2.8 nGy h(-1) Ra equivalent activity (Ra(e...
The distribution of natural radionuclide γ-ray activities and their respective annual effective d... more The distribution of natural radionuclide γ-ray activities and their respective annual effective dose rates, produced by 40 K, 238 U, 226 Ra, 235 U and 232 Th, were determined for granite samples collected along the road of Idfu -Marsa Alam in eastern desert of Egypt. This subject is important in environmental radiological protection, since granites are widely used as building material. The variation in concentration of radionuclides for thirty granite samples was determined. A HPGe spectrometer was used for quantification of gamma emitting radionuclides in the sediments. All sediments contained radionuclides from the uranium and thorium series as well as 40 K. 238 U concentrations in the samples ranged (from 12.03±0.88 to 19.34±1.41 Bq.kg -1), 235 U (from 1.16±0.11 to 4.83±0.44, Bq.kg -1), 226 Ra (from 9.69±0.82 to 18.97±1.33 Bq.kg -1), 228 Ra ranged (from 10.24±0.70 to 17.35±1.29) 232 Th range (from 9.99±0.67 to l7.65±1.23 Bq.kg -1) and 40 K (from 298.58±21.74 to 955.78±69.58 Bq.kg...
IOSR Journal of Applied Physics
In the present study, The natural radioactivity in soil, phosphate, and building materials (sand,... more In the present study, The natural radioactivity in soil, phosphate, and building materials (sand, granite, marble, and limestone) were determined by using gamma ray spectrometer NaI (Tl) and MCA 1024. AlphaGUARD was used for radon exhalation rate. The data analyses were performed to determine 226Ra, 232Th and 40K activity concentrations as well as 222Rn exhalation rate. The radium equivalent activity (Raeq), external hazard index (Hex), absorbed dose rate and annual effective dose were varied from 71.66 to 9048.94 Bqkg-1, 0.19 to 24.45, 34.48 to 4172.34 nGyh-1 and 0.04 to 5.12 mSvy-1 respectively in all samples. The mass and area exhalation rates were increased from 1.31±0.09 Bqkg-1h-1 and 23.09±0.33 Bqm-2h-1, at 30 0C, to 7.98±0.56 Bqkg-1h-1 and 141.11±1.52 Bqm-2h-1, at 60 0C, respectively, for phosphate samples (grain size<80m).
World Journal of Nuclear Science and Technology, 2014
IOSR Journal of Applied Physics, 2014
IOSR Journal of Applied Physics, 2014
Summary In underground mine-waters of coal-mines precipitation of barium sulfate can occur with c... more Summary In underground mine-waters of coal-mines precipitation of barium sulfate can occur with co- precipitation of the natural radionuclides 226Ra and 228Ra. Although most of the residue re- mains underground, 226Ra and 228Ra are found in the effluents released into rivers and are transported further on. Based on the Basic Safety Standards the river Lippe was choosen as an example
Journal of Medical Physics, 2012
Health Physics, 2003
The paper gives averages of 137Cs deposition densities in soils from three areas in Northern Ukra... more The paper gives averages of 137Cs deposition densities in soils from three areas in Northern Ukraine measured 12 to 15 y following the Chernobyl accident: in an area near Narodici (75 km west of the Chernobyl nuclear power plant in the so-called zone II) heavily contaminated by the Chernobyl fall-out and in areas around Korosten and Zhitomir showing contamination levels to be much lower. The three areas exhibited very different 137Cs deposition densities of 2.2 MBq m(-2), 400 kBq m(-2), and 5 kBq m(-2), respectively. During a 1-y observation, measurements of the 137Cs transfer in the food chain to humans and 137Cs whole body contents dependent on the 137Cs daily intake were carried out under realistic conditions of the rural inhabitants who lived in settlements within zone II. Detailed investigations of components of the daily diet showed that the high 137Cs contamination levels found in soils of zone II do not affect in any way low 137Cs concentrations of all important agricultural products harvested and consumed by villagers. With regard to consumption habits of the population of zone II, mushrooms and wild berries were found to contribute more than 95% of the 137Cs daily intake to the 137Cs whole body content of about 12 kBq (with maximum values up to 760 kBq) measured in a group of inhabitants of zone II during a period from July 1998 to July 1999. The median of the annual dose of these inhabitants from external and internal exposures was 1.2 mSv y(-1) with a geometric standard deviation of 2.6. Excluding extreme habits, the geometric mean of the total exposure was 1.0 mSv y(-1) with a geometric standard deviation of 1.3.
Page 1. On the human radiation exposure as derived from the analysis of natural and man-made radi... more Page 1. On the human radiation exposure as derived from the analysis of natural and man-made radionuclides in soils Vom Fachbereich Physik der Universität Hannover zur Erlangung des Grades Doktor der Naturwissenschaften Dr. rer. nat. genehmigte Dissertation von (M.Sc. ...
In the present study, The natural radioactivity in soil, phosphate, and building materials (sand,... more In the present study, The natural radioactivity in soil, phosphate, and building materials (sand, granite, marble, and limestone) were determined by using gamma ray spectrometer NaI (Tl) and MCA 1024. AlphaGUARD was used for radon exhalation rate. The data analyses were performed to determine 226 Ra, 232 Th and 40 K activity concentrations as well as 222 Rn exhalation rate. The radium equivalent activity (Raeq), external hazard index (Hex), absorbed dose rate and annual effective dose were varied from 71.66 to 9048.94 Bqkg -1 , 0.19 to 24.45, 34.48 to 4172.34 nGyh -1 and 0.04 to 5.12 mSvy -1 respectively in all samples. The mass and area exhalation rates were increased from 1.31±0.09 Bqkg -1 h -1 and 23.09±0.33 Bqm -2 h -1 , at 30 0 C, to 7.98±0.56 Bqkg - 1 h -1 and 141.11±1.52 Bqm -2 h -1 , at 60 0 C, respectively, for phosphate samples (grain size<80m). decay progeny) and the primordial radionuclide 40 K. The samples, were air dried at room temperature in open air to ensure th...
IEEE Transactions on Nuclear Science, 2000
Applied Water Science, 2022
Monitoring groundwater quality and analyzing geochemical processes are very crucial in dry enviro... more Monitoring groundwater quality and analyzing geochemical processes are very crucial in dry environments, especially in areas with intense agriculture and inadequate irrigation management systems. A total of forty-one groundwater samples were collected from the study area and analyzed for major ions chemistry. The results of the geochemical analyses are used to investigate the geochemical processes and make groundwater assessments. The hydrogeochemical characteristics of the groundwater samples revealed a highly mineralized Na+–Cl− water type, implying that the majority of the samples are chemically unfit for human consumption. Based on the water quality parameters analyzed for the groundwater samples collected in this study, such as sodium adsorption ratio (SAR), soluble sodium percentage (SSP), residual sodium carbonate (RSC), magnesium hazard (MH), permeability index (PI), and Kelley's ratio (KR), the suitability of groundwater samples for irrigation purposes is good to modera...
Environmental Forensics, 2020
AlphaGUARD radon gas analyzer and NaI (Tl) spectrometer were used to measure the concentration le... more AlphaGUARD radon gas analyzer and NaI (Tl) spectrometer were used to measure the concentration levels of 222Rn and, 226Ra, 232Th, and 40K respectively in 109 groundwater samples collected from four different districts in Qena governorate, Egypt. The average values of the activity concentration were 3.57 ± 0.08, 0.54 ± 0.03, 0.40 ± 0.03, and 5.10 ± 0.44 Bql−1 for 222Rn, 226Ra, 232Th, and 40K, respectively. The average values of 222Rn, 226Ra, and 232Th are lower than, 100, 1, and 1 Bql−1, respectively, the WHO recommended permissible levels for drinking water. For radiation exposure assessment, the annual effective doses due to ingestion of 226Ra and 232Th and inhalation of 222Rn for adults were determined and compared with the reference limits. The annual effective doses due to ingestion 139.21–201.34 µSvy−1 are higher than the public annual dose limit 100 µSvy−1 recommended by WHO. These indicate that the ingestion of groundwater from the study areas might pose radiological health h...
World Journal of Nuclear Science and Technology, 2014
International Journal of High Energy Physics
Journal of Radioanalytical and Nuclear Chemistry, 2007
Radiation protection dosimetry, 2008
Radionuclides which present in different beach sands are sources of external exposure that contri... more Radionuclides which present in different beach sands are sources of external exposure that contribute to the total radiation exposure of human. In this work, superficial samples of beach sand were collected from the Red Sea coastline (Ras Gharib, Hurghada, Safaga, Qusier and Marsa Alam areas) and at 20 km on Qena-Safaga road. The distribution of natural radionuclides in sand beach samples was studied by gamma spectrometry. The activity concentrations of primordial and artificial radionuclides in samples that are collected from the coastal environment of the Red Sea were 19.2 +/- 3 Bq kg(-1) for (210)Pb, 21.1 +/- 1 Bq kg(-1) for (226)Ra, 22.7 +/- 2 Bq kg(-1) for (238)U, 1.0 +/- 0.1 Bq kg(-1) for (235)U, 11.6 +/- 1 Bq kg(-1) for (228)Ra, 13.0 +/- 1 Bq kg(-1) for (228)Th, 12.4 +/- 1 Bq kg(-1) for (232)Th, 930 +/- 32 Bq kg(-1) for (40)K and 1.2 +/- 0.3 Bq kg(-1) for (137)Cs. The mean external gamma-dose rate was 62.5 +/- 3.2 nSv h(-1), 54.4 +/- 2.8 nGy h(-1) Ra equivalent activity (Ra(e...
The distribution of natural radionuclide γ-ray activities and their respective annual effective d... more The distribution of natural radionuclide γ-ray activities and their respective annual effective dose rates, produced by 40 K, 238 U, 226 Ra, 235 U and 232 Th, were determined for granite samples collected along the road of Idfu -Marsa Alam in eastern desert of Egypt. This subject is important in environmental radiological protection, since granites are widely used as building material. The variation in concentration of radionuclides for thirty granite samples was determined. A HPGe spectrometer was used for quantification of gamma emitting radionuclides in the sediments. All sediments contained radionuclides from the uranium and thorium series as well as 40 K. 238 U concentrations in the samples ranged (from 12.03±0.88 to 19.34±1.41 Bq.kg -1), 235 U (from 1.16±0.11 to 4.83±0.44, Bq.kg -1), 226 Ra (from 9.69±0.82 to 18.97±1.33 Bq.kg -1), 228 Ra ranged (from 10.24±0.70 to 17.35±1.29) 232 Th range (from 9.99±0.67 to l7.65±1.23 Bq.kg -1) and 40 K (from 298.58±21.74 to 955.78±69.58 Bq.kg...
IOSR Journal of Applied Physics
In the present study, The natural radioactivity in soil, phosphate, and building materials (sand,... more In the present study, The natural radioactivity in soil, phosphate, and building materials (sand, granite, marble, and limestone) were determined by using gamma ray spectrometer NaI (Tl) and MCA 1024. AlphaGUARD was used for radon exhalation rate. The data analyses were performed to determine 226Ra, 232Th and 40K activity concentrations as well as 222Rn exhalation rate. The radium equivalent activity (Raeq), external hazard index (Hex), absorbed dose rate and annual effective dose were varied from 71.66 to 9048.94 Bqkg-1, 0.19 to 24.45, 34.48 to 4172.34 nGyh-1 and 0.04 to 5.12 mSvy-1 respectively in all samples. The mass and area exhalation rates were increased from 1.31±0.09 Bqkg-1h-1 and 23.09±0.33 Bqm-2h-1, at 30 0C, to 7.98±0.56 Bqkg-1h-1 and 141.11±1.52 Bqm-2h-1, at 60 0C, respectively, for phosphate samples (grain size<80m).
World Journal of Nuclear Science and Technology, 2014
IOSR Journal of Applied Physics, 2014
IOSR Journal of Applied Physics, 2014
Summary In underground mine-waters of coal-mines precipitation of barium sulfate can occur with c... more Summary In underground mine-waters of coal-mines precipitation of barium sulfate can occur with co- precipitation of the natural radionuclides 226Ra and 228Ra. Although most of the residue re- mains underground, 226Ra and 228Ra are found in the effluents released into rivers and are transported further on. Based on the Basic Safety Standards the river Lippe was choosen as an example
Journal of Medical Physics, 2012
Health Physics, 2003
The paper gives averages of 137Cs deposition densities in soils from three areas in Northern Ukra... more The paper gives averages of 137Cs deposition densities in soils from three areas in Northern Ukraine measured 12 to 15 y following the Chernobyl accident: in an area near Narodici (75 km west of the Chernobyl nuclear power plant in the so-called zone II) heavily contaminated by the Chernobyl fall-out and in areas around Korosten and Zhitomir showing contamination levels to be much lower. The three areas exhibited very different 137Cs deposition densities of 2.2 MBq m(-2), 400 kBq m(-2), and 5 kBq m(-2), respectively. During a 1-y observation, measurements of the 137Cs transfer in the food chain to humans and 137Cs whole body contents dependent on the 137Cs daily intake were carried out under realistic conditions of the rural inhabitants who lived in settlements within zone II. Detailed investigations of components of the daily diet showed that the high 137Cs contamination levels found in soils of zone II do not affect in any way low 137Cs concentrations of all important agricultural products harvested and consumed by villagers. With regard to consumption habits of the population of zone II, mushrooms and wild berries were found to contribute more than 95% of the 137Cs daily intake to the 137Cs whole body content of about 12 kBq (with maximum values up to 760 kBq) measured in a group of inhabitants of zone II during a period from July 1998 to July 1999. The median of the annual dose of these inhabitants from external and internal exposures was 1.2 mSv y(-1) with a geometric standard deviation of 2.6. Excluding extreme habits, the geometric mean of the total exposure was 1.0 mSv y(-1) with a geometric standard deviation of 1.3.