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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Physics
- نوع مقاله: Journal Article
- کلمات کلیدی: Radiation,Specific activity,Dosage ELCR
- چکیده:
- چکیده انگلیسی: Introduction: Radionuclides found in foods are harmful to human health. Wheat and bean are among the most important food ingredients in the world. Therefore, this study aimed to determine the specific activity of natural radionuclides in wheat and bean produced near the refinery complex plant.
Material and Methods: In order to determine the specific activity of radionuclides, the gamma-ray spectrometry method was used employing a high-purity germanium detector with a relative efficiency of 80%.
Results: Our findings showed that the specific activity of the 226Ra isotope of radium had the ranges 232Th isotope of thorium was in the range of not detected (ND)-4.09 and ND-3.62 Bq/kg with the mean values of 2.19 and 2.69 Bq/kg for wheat and bean samples, respectively.The specific activity of the 40K isotope of potassium was obtained as 103.19-168.94 and 129.22-568.98 Bq/kg with the mean values of 142.21 and 458.37 Bq/kg for wheat and bean samples, respectively. The annual effective dose for wheat and bean intake was 0.11-0.52 and 0.02-0.18 mSv, respectively. Furthermore, the mean of excess lifetime cancer risk for wheat and bean samples was calculated as 1.06×10-3 and 0.11×10-3, respectively. The latter values are lower than the world average for bean samples.
Conclusion: According to the results of this study, the radiological parameters of wheat were higher than the global average and reference value, which may be due to ash dispersion in this area. For bean, these parameters were lower than the mean value. As a result, it could be concluded that bean is not considered as a threat to consumer health.- انتشار مقاله: 04-08-1398
- نویسندگان: Monire Mohebian,Reza Pourimani
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Physics
- نوع مقاله: Journal Article
- کلمات کلیدی: Medicinal Plant Neutron Activation Analysis Elements Gamma,Ray Spectrometry
- چکیده:
- چکیده انگلیسی: Introduction: Nowadays, many people use medicinal plants to manage diseases; therefore, detailed knowledge of the type and level of elements present in these plants is of prominent importance.The present study aimed to determine the weight fraction of 12 elements in the five most common medicinal plants in Iran. The names of these plants are caraway (Carum carvi), savory (Satureja hortensis), purslane (Portulaca oleracea), fenugreek (Trigonella foenum-graecum), and milk thistle (Silybum marianum) which were purchased from herbal pharmacies.
Material and Methods: The neutron activation method was used to determine the elements. In the current study, neutrons from the research reactor core in Tehran, Iran were used and gamma spectra from radionuclides were recorded using a high purity germanium detector. The mass fractions of 12 elements were determined in the five abovementioned plants.
Results: Caraway had the maximum amounts of elements of Fe (8,789 ppm), Cr (8 ppm), and Na (517 ppm) among the selected plants. The savory contained maximum levels of Mn (95 ppm), Cl (3,702 ppm), Ca (18,328 ppm), K (21,562 ppm), and V (2.7 ppm) and the lowest amount of Fe (195 ppm), Zn (13 ppm), Ca (2,243 ppm), Al (99ppm), Mn (26 ppm), and Mg (177ppm) were observed in fenugreek.
Conclusion: The highest levels of Cr and Mg were obtained for caraway (8 ppm) and pursalne (3,915 ppm), respectively. These elements can help to decrease blood cholesterol and triglyceride levels. Furthermore, the results showed that these herbs were rich in essential nutrients for metabolic functions.- انتشار مقاله: 09-05-1398
- نویسندگان: Sedigheh Kashian,Ali Asghar Fathivand,Reza Pourimani
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Physics
- نوع مقاله: Journal Article
- کلمات کلیدی: cancer,Water,Sediment,Dosage,Natural radiation
- چکیده:
- چکیده انگلیسی: Introduction: There are natural and artificial radioactive nuclei in our environment, as well as in the structure of the living organism. Currently, industrial and municipal pollution has also an impact on increasing the level of radiation. The present study investigated the effect of inlet water from Arak Wastewater Treatment Plant on international Meighan Wetland and assessed the radiological indicators of sediments and water samples in this area.
Material and Methods: In this study, the specific activity of radionuclides in water and sediment samples taken from the water entry areas of the international Meighan wetland was determined using a high purity germanium detector (Baltic Scientific Instrument LTD, 005- Latvia). Radiological indices for collected samples were calculated, and the topographical maps of radiation dose distribution were plotted using Surfer software (version 13).
Results: Specific activities of 226Ra, 232Th, 40K, and 137Cs in sediment samples were in the range of 14.44-26.58, 22.78-34.56, 360.84-447.79, and 0.7-13.03 , respectively. The average values of the external hazard index for sediment samples were calculated at 0.25.
Conclusion: According to the obtained results, it can be concluded that pollution is more embedded in the Treatment Plant's basin, and a small amount goes to the wetlands. Radioactivity in the research area is normal, and topographic maps show that the distance from the entrance reduces the activity of radium and increases the activity of cesium. Assessment of hazard indicators showed that radiation levels in this area are not dangerous to human health.- انتشار مقاله: 22-12-1397
- نویسندگان: Reza Pourimani,Ramin Fardad,Hasan Khalili
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Physics
- نوع مقاله: Journal Article
- کلمات کلیدی: Dosage,Radionuclides,Radiation hazard,Construction material
- چکیده:
- چکیده انگلیسی: Introduction: Although travertine is now widely used as a building material, the effects of its radiological hazards to public health should be a matter of concern. Therefore, this study aimed to determine its radiological parameters with regard to human health.
Material and Methods: In this research 10 travertine samples were collected from exploitation zone in Haji Abad Mine in Mahallat, Iran. Specific radionuclide activities were determined by gamma spectrometry using a high purity germanium detector. In addition, radiological parameters, such as radium equivalent, air doses, internal and external risk factors (Hin, Hex), yearly gonadal dose equivalent (AGDE), and additional cancer risk (ELCR) throughout life were calculated.
Results: The specific activities of 226Ra, 232Th, and 40K radionuclides ranged within 3.08-9.16, 1.22-6.45, and 20.15-91.04 Bq/kg, respectively. The obtained means of internal and external annual effective dose of samples were 0.03 and 0.007 mSv/y. External and internal hazard indices for samples were within the range of 0.003-0.01 and 0.01-0.03, respectively.
Conclusion: The results of this study show that the amount of radionuclides in travertine rocks is very small compared to its global average in soil and rock. Therefore, it is suggested to use travertine as a building material, which is not a threat to public health.- انتشار مقاله: 04-05-1397
- نویسندگان: Reza Pourimani,Roshanak Ghorbani
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Physics
- نوع مقاله: Journal Article
- کلمات کلیدی: natural radioactivity,Radionuclides Dosage Radiation Health Risk
- چکیده:
- چکیده انگلیسی: ntroduction: The purpose of this study was to measure the radioactivity in the agricultural soil of south-east of Shazand Refinery Complex to determine both reliable baseline data on the radiation level and the radiation dose exposure to the farmers and inhabitants of the studied area.
Material and Methods: This study was conducted on 21 soil samples collected from two different lands. Sampling spots in each land were selected for the assessment of specific activities of radionuclides of 226Ra, 232Th, 40K, and137Cs by using high purity germanium detector setup. Standards of International Atomic Energy Agency references material gamma ray uranium, reference gamma-ray thorium, and reference gamma-ray potassium were used for quality control and determining efficiency calibration. All samples were examined for radium equivalent, absorbed gamma dose rate, internal hazard index, external radiation hazard, annual gonadal dose equivalent, indoor and outdoor annual effective dose equivalent, and excess lifetime cancer risk.
Results: The specific activities of radionuclides 226Ra, 232Th, 40K, and 137Cs varied from13.12 to 33.03, 11.3 to 35.86, 257.82 to 605.5, and 1.28 to 13.36 Bq/kg, respectively. Moreover, the results of this study were compared with those reported from other countries and worldwide average.
Conclusion: Although all samples were polluted by the 137Cs fission product, the measured values were within the global reported safety limits. Therefore, there is no risk for farmers and inhabitants in this region.- انتشار مقاله: 03-05-1397
- نویسندگان: Monire Mohebian,Reza Pourimani
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Physics
- نوع مقاله: Journal Article
- کلمات کلیدی: Soil,Dose Rate,Gamma Ray Spectrometry Radionuclides
- چکیده:
- چکیده انگلیسی: Introduction: Nuclear radiation is potentially harmful to humans and soil contamination with radionuclides is the main source of human radiation exposure. These radionuclides can., enter to human body through the food chain. In this study, 34 soil samples were collected from between Arak city and Shazand Power Plant over 20 km length and analyzed.
Materials and Methods: The specific activities of 226Ra, 232Th, 40K, and 137Cs were measured in soil samples, using gamma-ray spectrometry and a high-purity germanium (HPGe) detector. For all the samples, we calculated radiological hazards such as radium equivalent (Raeq), dose rate in air (D), internal and external hazard indices (Hin, Hex), annual gonadal dose equivalent (AGDE), and excess lifetime cancer risk.
Results: The specific activities of 226Ra, 232Th, 40K, and 137Cs in the soil samples varied from 18.92 to 43.11, 25.31 to 54.27, 230.17 to 728.25, and from in and Hex wereless than unity. Excess lifetime cancer risk of the samples ranged from 0.21×10-3 to 0.31×10-3, which are close to the mean world value (0.29×10-3) butlower than the acceptable value (10-3).
Conclusion: The radiological parameters estimated from the specific activities of the radionuclides in soil were within the acceptable range, and therefore, radiation exposure poses no significant risks to the resident population in the vicinity of the power plant.- انتشار مقاله: 22-07-1396
- نویسندگان: Reza Pourimani,Tayebeh Davoodmaghami
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Physics
- نوع مقاله: Journal Article
- کلمات کلیدی: Soil,Wheat,Barley,Radionuclides,Dose
- چکیده:
- چکیده انگلیسی: Introduction: Artificial and natural radionuclides exist in the environmental materials, such as water, soil, rocks, and plant as well as in animals and human body tissues. Therefore, human being and environment are at constant radiation exposure. Regarding this, the present study aimed to determine the specific activities of radionuclides and perform the risk assessment wheat and barley samples in Karbala, Iraq. Materials and Methods: In this study, natural and artificial radioactivity concentrations were determined in wheat and barley samples, as well as their surrounding soil, using gamma ray spectrometrymethod by means of a high-purity germanium (HPGe) detector with 88% relative efficiency. According to the measured specific activities of radionuclides in food samples and according to annual consumption of wheat and barley by adult person excess lifetime cancer risk due to ingestion of radionuclides was calculated. Results: Specific activities of 226Ra, 232Th, 40K, and 137Cs in the soil samples varied within the ranges of 29.37-38.86, 23.24-45.70, 291.15-549.78, and 1.25-10.82Bq/kg, respectively. The excess lifetime cancer risk due to the ingestion of wheat and barley were calculated as 0.013×10-3 and 0.006×10-3, respectively, which are lower than the maximum acceptable value (10-3). Conclusion: As the findings of the present study indicated, the specific activities of natural radionuclides in the soil were close to that of the world average. The observation of artificial radiocaesium, which is released by nuclear accidents or weapon test, in all soil samples was indicative of the pollution of the studied regions by radioactive dust.
- انتشار مقاله: 27-03-1396
- نویسندگان: Reza Pourimani,Seyed Mohsen Mortazavi Shahroudi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Physics
- نوع مقاله: Journal Article
- کلمات کلیدی: Cancer risk,mushroom,Radionuclide,Foodstuff
- چکیده:
- چکیده انگلیسی: Introduction
Artificial and natural radionuclides are found in diverse environmental compartments, such as water, soil, rocks, vegetables, animals, and human body tissues. As such, humans and environments are at constant exposure of these radiation types. In this research investigated specific activities of radionuclide and dose assessment of some species of mushrooms.
Materials and Methods
In this study, natural and artificial radioactivity concentrations were determined in Agaricus bispora (nourished mushrooms), Cantharellus cibarius, Coprinus micaceus (wild fungi species) and their composts through gamma-ray spectrometryusinga high-purity germanium (HPGe) detector with 30% relative efficiency.
Results
Radioactivity concentrations of 238U and 232Th in edible mushroom samples were lower than the minimum detectable activity (MDA). For 40K and 137Cs, these concentrations were within the ranges of 1895.24-1920.24and <0.45-0.72Bq/kg, respectively. Moreover, specific activities of 238U, 232Th, 40K, and 137Cs in the composts varied within the ranges of < 0.47 - 3.40, 6.59-7.82, 1166.12-1428.27, and 0.75-1.97±Bq/kg, respectively. Excess lifetime cancer risk due to the ingestion of nourished mushrooms was calculated as 1.28×10-4, which is lower than the maximum acceptable value.
Conclusion
Results of this study showed that the radioactivity concentrations of edible mushrooms are close to or lower than MDA. In addition, radioactivity concentrations of the composts were indicative of the low pollution of the studied regions by radiocesium. Annual consumption rate threshold was calculated as 26.7 kg in dry weight (fresh weight: 267 kg). Therefore, it could be concluded that consumption of these mushrooms is associated with no health consequences for consumers.- انتشار مقاله: 23-04-1395
- نویسندگان: Reza Pourimani,Sana Rahimi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Physics
- نوع مقاله: Journal Article
- کلمات کلیدی: Iron ore,Radionuclide,Natural radiation,Dose assessment
- چکیده:
- چکیده انگلیسی: Introduction
Iron ore is one of the most important natural raw materials that is widely used for manufacturing iron and steel. This type of ore contains various amounts of radionuclides; thus, exposing workers handling their extraction, transportation, and processing to radiation.
Materials and Methods
In this study, 12 ore samples (each mass weighing about 2 kg) were collected from the iron ore mining areas of Arak region, Iran. The specific activities of 226Ra, 232Th, and 40K were determined usinggamma-ray spectrometry method employing high-purity germanium (HPGe) detector.
Results
The specific activities of 226Ra, 232Th, and 40K in samples were 9.39-271.70 Bq/kg, -3 Sv/y) suggested in International Commission of Radiological Protection (ICRP) Publication 82.
Conclusion
The gamma ray spectrometric analysis showed that the specific activities of natural radionuclides in samples, except for limonite ore, were within the worldwide range. The effective dose received by workers was much lower than the maximum acceptable value (1000 μSv/y); therefore, the level of radiations in this mine had no adverse consequences for public health.- انتشار مقاله: 01-05-1395
- نویسندگان: Reza Pourimani,Hamid Reza Azimi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Physics
- نوع مقاله: Journal Article
- کلمات کلیدی: Medicinal plant,Radionuclide,Natural radiation
- چکیده:
- چکیده انگلیسی: Introduction
Natural and artificial radionuclides are the main sources of human radiation exposure, which enter the food chain from the environment. Radionuclides can affect human health by transferring from soil to plants and entering the human body. In this research study, we aimed to determine the activity concentrations of radionuclides and calculate the average annual committed effective dose (AACED) due to the ingestion of some medicinal and edible plants from Shazand, Markazi Province, Iran.
Materials and Methods
The specific activities of 226Ra, 232Th, 40K, and 137Cs in eight medicinal and edible plant species and their surrounding soils were determined, using gamma-ray spectrometry and a high-purity germanium (HPGe) detector. The samples were collected from Shazand, situated in Markazi Province, Iran.
Results
The maximum soil-to-plant transfer factor (TF)for 226Ra, 232Th, 40K, and 137Cswas estimated at 0.13, 0.13, 3.17, and 0.09, respectively. Based on the findings, the AACED for 1kg of edible plants varied from 0.63±0.16 to 13.71±0.14μSv/y. The annual gonadal dose Equivalent (AGDE) varied from 556 to 717 µSv/y for the soil samples (mean: 642µSv/y). The threshold consumption rate for edible plants ranged between21.86and 82.63 kg/y.
Conclusion
In this study, AACED due to the ingestion of radionuclides was lower than the global average (0.3 mSv/y). Therefore, the present results indicated no radiation health risks, associated with the use of these medicinal plants for disease treatment. However, it should be noted that all soil samples and some plants were polluted by radiocesium.- انتشار مقاله: 15-12-1394
- نویسندگان: Reza Pourimani,Mitra Noori,Maryam Madadi
- مشاهده