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Ali Abid Abojassim - One of the best experts on this subject based on the ideXlab platform.

  • Assessment of Annual Effective Dose for Different Age Groups based on Radon Concentrations in the Groundwater of Qassim, Saudi Arabia
    Iranian Journal of Medical Physics, 2020
    Co-Authors: Atef El-taher, Ali Abid Abojassim, Laith Ahmed Najam, Hussien Abid Ali Mraity
    Abstract:

    Introduction: Given that the groundwater is a radon contaminated and used as a source for drinking water, then measuring the amount contamination is of high necessity. Material and Methods: The measurement was performed using RAD-7 detector. Results: The measured radon concentration values ranged 1.20-15.43 Bq/l with the mean of 5.18±0.39 Bq/l. The estimated total Annual Effective Doses based on radon concentrations in drinking water were within the range of 6.34-81.62 µSv/y for infants, 2.34-30.04 µSv/y for children, and 3.07-39.42 µSv/y for adults. Moreover, the corresponding mean values were estimated at 27.41±2.06, 10.08±0.76, and 13.23±0.99 µSv/y, respectively. Conclusion: The total Annual Effective Dose in all samples were within the global average level of ingestion exposure Dose value (0.1 mSv/y from radon concentrations) reported by the United Nations Scientific Committee on Effects of Atomic Radiations. Therefore, there are no risks for the consumption of these water samples.

  • Annual Effective Dose of gamma emitters in infants, children and adults forfrozen chicken samples consumed in Iraq.
    Current Pediatric Research, 2017
    Co-Authors: Ali Abid Abojassim
    Abstract:

    This work was directed towards finding out the natural radioactivity and Effective Dose due to ingestion of frozen chicken samples that are created regionally and foreign from outside Iraq taking in account different age groups. The samples were collected from markets in Al-Najaf city. This food analyzed in the laboratory using gamma spectrometer. The average of specific activity of 40K, 226Ra and 232Th of the samples under study were found to be 65.40±11.14 Bq/ kg, 4.53±0.89 Bq/kg and 0.87±0.19 Bq/kg respectively. These results were less than the worldwide vary for 40K, 226Ra and 232Th in food according to UNSEAR 2000 that it's four hundred Bq/kg, thirty Bq/kg and thirty two Bq/kg, respectively. While the average total value of Annual Effective Dose for persons eating these samples in different age groups (infant, children and adult) were 112.25±16.98 μSv/y, 165.32±28.00 μSv/y and 93.65±15.25 respectively. The average of the Annual Effective Dose found to be below the limit of (1.0 mSv/y) that is the value that suggested by the International Commission on radiological Protection. In general, it is complete that foodstuffs that were analyzed are safe for human consumption as a result of their natural radioactivity levels are under the utmost permissible level.

  • Annual Effective Dose of Gamma Emitters in Adults and Children for Some Types of Rice Consumed in Iraq.
    Journal of food protection, 2016
    Co-Authors: Ali Abid Abojassim, Dahir Mohammad Dahir, Azhar S. Alaboodi, Abbas H. Abonasria
    Abstract:

    ABSTRACT This work studies the activity concentration of natural radioactivity in 20 different types of rice, including imported rice and that produced locally. The rice samples were collected from markets and farms in Iraq, and then a natural radioactivity investigation was done in the environmental laboratory of the Kufa University, using gamma-ray spectrometer systems. The research focused on measuring the activity concentration of natural radioactivity (238U, 232Th, and 40K) to determine the level of the radium equivalent activity, internal hazard indices, and Annual Effective Dose. The results show that all these parameters are within the permissible limits and that radioactivity is present in almost all foodstuffs at levels ranging from 40 to 600 Bq/kg of food. Radioactivity in foodstuffs is attributed to a natural source, potassium-40, and to artificial sources, which include industrial radioactivity, weapons testing, and accidents involving radioactivity. In this article, radionuclides have been i...

  • Assessment of Annual Effective Dose for Natural Radioactivity of Gamma Emitters in Biscuit Samples in Iraq.
    Journal of food protection, 2015
    Co-Authors: Ali Abid Abojassim, Lubna A. Al-alasadi, Ahmed R. Shitake, Faeq A. Al-tememie, Afnan Ali Husain
    Abstract:

    Biscuits are an important type of food, widely consumed by babies in Iraq and other countries. This work uses gamma spectroscopy to measure the natural radioactivity due to long-lived gamma emitters in children's biscuits; it also estimates radiation hazard indices, that is, the radium equivalent activity, the representative of gamma level index, the internal hazard index, and the Annual Effective Dose in children. Ten samples were collected from the Iraqi market from different countries of origin. The average specific activities for (226)Ra, (232)Th, and (40)K were 9.390, 3.1213, and 214.969 Bq/kg, respectively, but the average of the radium equivalent activity and the internal hazard index were 33.101 Bq/kg and 0.107, respectively. The total average Annual Effective Dose from consumption by adults, children, and infants is estimated to be 0.655, 1.009, and 0.875 mSv, respectively. The values found for specific activity, radiation hazard indices, and Annual Effective Dose in all samples in this study were lower than worldwide median values for all groups; therefore, these values are found to be safe.

  • Estimated the mean of Annual Effective Dose of radon gases for drinking water in some locations at Al-Najaf city
    Journal of Kufa - Physics, 2014
    Co-Authors: Ali Abid Abojassim, Ahmed R. Shitake
    Abstract:

    In this work, Radon concentrations in drinking water were measured at 42 locations in Al- Najaf cities, using RAD-7 radon monitoring system of Durridge company USA. The Annual Effective Dose for all samples of drinking water were estimated by equations depending on UNSCEAR organization. It is found that the radon concentrations in samples in studied area were varied from (2.43±0.879 Bq/m3) to (225.5±12.657 Bq/m3), while the mean Annual Effective Dose of Ingestion and Inhalation varied from (0.017739 μS.y-1) to (1.64615 μS.y-1) and (0.088807 μS.y-1) to (0.704526 μS.y-1) respectively. When the results were compared of radon concentrations with the internationally recommended reference levels (World healthy Organization limit 500 Bq/m3) and the mean Effective Annual Dose for radon in drink water normal limits of world (1 mSv/y), there were no indications of existence of radon problems in the water sources in this survey. therefore the drinking water in Al-Najaf city is safe as far as radon concentration is concerned.

Rohit Mehra - One of the best experts on this subject based on the ideXlab platform.

  • Variation of Annual Effective Dose due to radon level in indoor air in Marwar region of Rajasthan, India
    2015
    Co-Authors: Asha Rani, Sudhir Mittal, Rohit Mehra
    Abstract:

    In the present work, indoor radon and thoron measurements have been carried out from different locations of Jodhpur and Nagaur districts of Northern Rajasthan, India using RAD7, a solid state alpha detector. The radon and thoron concentration in indoor air varies from 8.75 to 61.25 Bq m−3 and 32.7 to 147.2 Bq m−3 with the mean value of 32 and 73 Bq m−3 respectively. The observed indoor radon concentration values are well below the action level recommended by International Commission on Radiological Protection (200-300 Bq m−3) and Environmental Protection Agency (148 Bq m−3). The survey reveals that the thoron concentration values in the indoor air are well within the International Commission on Radiological Protection (2005). The calculated total Annual Effective Dose due to radon level in indoor air varies from 0.22 to 1.54 mSv y−1 with the mean value of 0.81 mSv y−1 which is less than even the lower limit of action level 3-10 mSv y−1 recommended by International Commission on Radiological Protection (2005).

  • estimation of Annual Effective Dose due to radon level in indoor air and soil gas in hamirpur district of himachal pradesh
    Journal of Geochemical Exploration, 2014
    Co-Authors: Rohit Mehra, Pankaj Bala
    Abstract:

    Abstract Indoor air and soil gas radon measurements are simultaneously performed in Hamirpur district of Himachal Pradesh using RAD7, a solid state alpha detector. The study is performed for the estimation of radon level and Annual Effective Dose for indoor air. Different locations are selected and it is found that the variation of radon concentration in indoor air and soil gas in Hamirpur region ranges from 35 Bq m − 3 to 956 Bq m − 3 and 35 to 2280 Bq m − 3 having mean values 189.43 Bq m − 3 and 462.56 Bq m − 3 respectively. From indoor air, the total Annual Effective Dose is calculated and it varies from 0.88 mSv y − 1 to 24.09 mSv y − 1 with mean value of 4.77 mSv y − 1 . In general, it is found that the Annual Effective Dose limit was within the recommended reference level (3 mSv y − 1 to 10 mSv y − 1 ) of the world organisations. A good correlation between radon concentration in air and soil gas is observed.

  • estimation of Annual Effective Dose from indoor radon thoron concentrations and measurement of radon concentrations in soil
    Radiation Protection Dosimetry, 2014
    Co-Authors: Rohit Mehra, Pankaj Bala
    Abstract:

    Radon short-lived decay products generated from the earth is one of the serious indoor air and soil pollutants. The RAD-7 Electronic Radon Detector with a special accessory is used for the purpose of measurement. The radon and thoron concentrations in the houses of the study area are found to vary from 35±0.5 to 315.2±5.35 Bq m(-3) and 66.1±2.3 to 1710±139.36 Bq m(-3) with the average values of 98.65±1.9 and 388.19±11 Bq m(-3), respectively. From indoor air, the total Annual Effective Dose is calculated and it varies from 0.88 to 7.94 mSv y(-1). The preliminary investigation shows that the thoron concentration is higher than the radon concentration in the houses of the study area. In general, the values of the indoor air are within the recommended action level of the International Commission on Radiological Protection, 2009.

  • Estimation of Annual Effective Dose from indoor radon/thoron concentrations and measurement of radon concentrations in soil.
    Radiation protection dosimetry, 2013
    Co-Authors: Rohit Mehra, Pankaj Bala
    Abstract:

    Radon short-lived decay products generated from the earth is one of the serious indoor air and soil pollutants. The RAD-7 Electronic Radon Detector with a special accessory is used for the purpose of measurement. The radon and thoron concentrations in the houses of the study area are found to vary from 35±0.5 to 315.2±5.35 Bq m(-3) and 66.1±2.3 to 1710±139.36 Bq m(-3) with the average values of 98.65±1.9 and 388.19±11 Bq m(-3), respectively. From indoor air, the total Annual Effective Dose is calculated and it varies from 0.88 to 7.94 mSv y(-1). The preliminary investigation shows that the thoron concentration is higher than the radon concentration in the houses of the study area. In general, the values of the indoor air are within the recommended action level of the International Commission on Radiological Protection, 2009.

  • Analysis of uranium concentration in drinking water samples using ICPMS.
    Health Physics, 2013
    Co-Authors: Asha Rani, Rohit Mehra, Vikas Duggal, Vysetti Balaram
    Abstract:

    Uranium concentration in drinking water samples collected from some areas of Northern Rajasthan has been measured using inductively coupled plasma mass spectrometry. The water samples were taken from hand pumps. The uranium concentration in water samples varies from 2.54-133.0 μg L with a mean value of 38.48 μg L. The uranium concentration in most of the drinking water samples exceeds the safe limit (30 μg L) recommended by the World Health Organization. The Annual Effective Dose associated with drinking water due to uranium concentration is estimated from its Annual intake using dosimetric information based on ICRP 72. The resulting value of the Annual Effective Dose from drinking water sources is in the range of 2.11-110.45 μSv. The Annual Effective Dose in one of the samples was found to be greater than WHO-recommended level of 100 μSv y.

Tibor Kovács - One of the best experts on this subject based on the ideXlab platform.

  • Assessment of 232 Th, 226 Ra, 137 Cs, and 40 K concentrations and Annual Effective Dose due to the consumption of Vietnamese fresh milk
    Journal of Radioanalytical and Nuclear Chemistry, 2021
    Co-Authors: Van-hao Duong, Edit Tóth-bodrogi, Thanh-duong Nguyen, Miklós Hegedűs, Tibor Kovács
    Abstract:

    Vietnam has little data on radionuclide concentrations in milk, despite steadily increasing domestic consumption. Eight milk brands were investigated by gamma-spectrometry, and the resulting ingestion Dose was calculated. The 232Th, 226Ra, 137Cs, and 40K concentrations varied from 0.60 ± 0.19 to 1.21 ± 0.24, 1.45 ± 0.18 to 2.45 ± 0.24, below detection limit to 0.13 ± 0.06, and 341 ± 6 to 387 ± 7 Bq/kg (dry w.t). The total average Annual Effective Dose for all age groups were similar for all brands, and concentrations are far less than the WHO guidance level. All brands are safe for consumption.

  • Assessment of ^232Th, ^226Ra, ^137Cs, and ^40 K concentrations and Annual Effective Dose due to the consumption of Vietnamese fresh milk
    Journal of Radioanalytical and Nuclear Chemistry, 2021
    Co-Authors: Van-hao Duong, Edit Tóth-bodrogi, Thanh-duong Nguyen, Miklós Hegedűs, Tibor Kovács
    Abstract:

    Vietnam has little data on radionuclide concentrations in milk, despite steadily increasing domestic consumption. Eight milk brands were investigated by gamma-spectrometry, and the resulting ingestion Dose was calculated. The ^232Th, ^226Ra, ^137Cs, and ^40K concentrations varied from 0.60 ± 0.19 to 1.21 ± 0.24, 1.45 ± 0.18 to 2.45 ± 0.24, below detection limit to 0.13 ± 0.06, and 341 ± 6 to 387 ± 7 Bq/kg (dry w.t). The total average Annual Effective Dose for all age groups were similar for all brands, and concentrations are far less than the WHO guidance level. All brands are safe for consumption.

  • 210PO IN SOIL AND TOBACCO LEAVES IN QUANG XUONG, VIETNAM AND ESTIMATION OF Annual Effective Dose TO SMOKERS
    Radiation protection dosimetry, 2020
    Co-Authors: Hao Van Duong, Duong Thanh Nguyen, Anita Peka, Edit Tóth-bodrogi, Tibor Kovács
    Abstract:

    210Po is the main radiotoxic chemical in tobacco smoke and one of the primary causes of lung cancer. Investigating 210Po concentration in tobacco is important in estimating the Annual Effective Dose (AED) due to smoking. In this study, the 210Po concentrations in tobacco leaves and soil in Quang Xuong, Vietnam were measured using a high-resolution passivated and implanted planar silicon detector. Based on these data the AEDs to smokers were estimated. The 210Po activity concentration in tobacco varied significantly from 28.7 to 254.0 mBq g-1, whereas its variation in soil was insignificant. The AED due to smoking fresh tobacco leaves in Vietnam (average 565 μSv y-1) was significantly higher than the values reported for other countries (36-361 μSv y-1).

D J Adeyemo - One of the best experts on this subject based on the ideXlab platform.

  • Annual Effective Dose associated with radon gross alpha and gross beta radioactivity in drinking water from gold mining areas of shanono and bagwai kano state nigeria
    Microchemical Journal, 2020
    Co-Authors: Suleiman Bello, Nuraddeen Nasiru Garba, Rabiu Nasiru, D J Adeyemo
    Abstract:

    Abstract Artisanal gold mining activities in Shanono and Bagwai local governments of Kano state Nigeria is a serious threat to the quality of drinking water in the area. This work was carried out to assess the radon, gross alpha and gross beta radioactivity in drinking water sources from artisanal gold mining villages in Shanono and Bagwai local government areas of Kano state, Nigeria. Water samples were collected and analysed for gross α and β radioactivity using a non-gas proportional counter with model protean instrument corporation MPC 2000DP single channel and for 222Rn using liquid scintillation counter (Tri-Carb-LSA1000). 222Rn, gross α and β radioactivity had average concentrations of 36.101, 0.142 and 0.285 Bq/L respectively. The Annual Effective Dose for the ingestion of 222Rn, gross α and β radioactivity were 0.264, 0.228, 0.457mSv/year for adults; 0.395, 0.114, 0.229mSv/year for children and 0.461, 0.057 and 0.114mSv/year for infants respectively. These values were higher than the ICRP, WHO, UNSCEAR and USEPA recommended safety limits, indicating that the water is not safe for drinking and domestic purposes in terms of radiological consequences.

Mahmut Doğru - One of the best experts on this subject based on the ideXlab platform.

  • Micro-chemical and radiological characterization using γ-spectrometry and WDXRF spectrometry and Annual Effective Dose of cigarette tobaccos
    Microchemical Journal, 2014
    Co-Authors: Ö. Söğüt, A.f. Kocaer, Ö. Selçuk Zorer, Y. Özdemir, Mahmut Doğru
    Abstract:

    Abstract Several kinds of cigarette tobacco were analyzed to determine contents of essential elements, natural and artificial radioactivity. The contents of essential elements and radionuclides were determined by WDXRF and gamma spectrometry, respectively. Samples were analyzed by WDXRF technique for the following elements: Al, P, S, Cl, K, Ca, Ti, Mn, Fe, Ni, Cu, Zn, As, Br, Sr and In in cigarette tobaccos. In the contents of essential elements, the mean amounts of K (48.891%) and Ca (38.358%) have the highest contents in the cigarette tobaccos. The radionuclide activity concentrations of 137Cs, 238U, 232Th, 40K and 90Sr were measured in cigarette tobaccos. According to radioactivity concentration results, 238U ranged between 0.549 and 6.181 Bq/kg; 232Th between 0.160 and 3.748 Bq/kg; 137Cs between 0.023 and 2.355 Bq/kg; 90Sr between 0.019 and 2.305 Bq/kg and 40K between 2.894 and 56.333 Bq/kg. It was concluded that the Annual Effective Dose due to inhalation for adults (smokers) for 238U varied from 4.97 to 55.94 μSv/y (average 28.04 μSv/y), while for 232Th from 12.48 to 292.41 μSv/y (average 138.65 μSv/y) and for 40K from 18.97 to 370.45 nSv/y (average 139.83 nSv/y). The Annual Effective Dose from 137Cs and 90Sr of Chernobyl origin varied from 0.70 to 71.29 nSv/y (average 29.86 nSv/y) and from 9.49 to 1150.93 nSv/y (average 415.29 nSv/y), respectively.