Radioactivity levels and health risks due to radionuclides in the soil and sediment of mid-Black Sea: Kızılırmak Deltas-Turkey

2018 ◽  
Vol 106 (11) ◽  
pp. 927-937 ◽  
Author(s):  
Sema Arıman ◽  
Hasan Gümüş
Keyword(s):  
Hazard Index ◽  
Natural Radionuclide ◽  
Nuclear Fission ◽  
Base Line ◽  
Dose Equivalent ◽  
Radium Equivalent Activity ◽  
Anthropogenic Radionuclides ◽  
Lifetime Cancer Risk ◽  
Activity Concentrations ◽  
Soil And Sediment

Abstract Artificial and natural radionuclide pollutants of the marine environment have been recognized as a serious environmental concern. In this study, the activity concentrations of terrestrial and anthropogenic radionuclides in the soil and sediment samples collected from Bafra Kızılırmak Delta were measured by using gamma spectrometry with an NaI (Tl) detector. The average specific of activity concentrations for 238U, 232Th and 40K were found to be 28.59, 17.48 and 150.59 Bq kg−1, respectively. On the other hand, 137Cs was also measured in some samples. 137Cs (t1/2=30.17 years) is a man-made radionuclide released from nuclear fission and activation processes. It has a mean value of 5.32 Bq kg−1. From the activity concentrations, the radium equivalent activity (Raeq), the absorbed gamma dose rates (DR), the annual gonadal dose equivalent, annual effective dose equivalent, internal (Hin), external hazard index (Hex) and excess lifetime cancer risk were estimated. This study can be used as a base line for future investigations and the data obtained in this study may be useful for natural radioactivity mapping and also be used as a reference data for monitoring possible radioactivity pollutions in future.

scholarly journals A review: Natural and artificial radionuclides and radiation hazard parameters in the soil of mountain regions in Serbia

2020 ◽  
Vol 65 (1) ◽  
pp. 1-18
Author(s):  
Branislava Mitrovic ◽  
Dragana Todorovic ◽  
Jelena Ajtic ◽  
Borjana Vranjes
Keyword(s):  
Natural Radionuclides ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Radiation Hazard ◽  
Dose Equivalent ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Lifetime Cancer Risk ◽  
External Hazard Index ◽  
Hazard Parameters

This review paper discusses the content of natural (40K, 238U, 226Ra, and 232Th) and artificial (137Cs) radionuclides in the soil of the mountains of Maljen, Tara and Kopaonik in the Republic of Serbia over 2002-2015. In addition, the paper gives radiation hazard parameters, i.e., radium equivalent activity, absorbed dose rate, annual effective dose equivalent, external hazard index, annual gonadal dose equivalent, and excess lifetime cancer risk outdoors that we calculated from the obtained content of the natural radionuclides in the soil samples. We compared the parameters to previously published results for different parts of the country and looked into the radioecological status of the investigated areas.

scholarly journals Measurement of NORM in Building Materials to Assess Radiological Hazards to Human Health and Develop the Standard Guidelines for Residents in Thailand: Case Study in Sand Samples Collected from Seven Northeastern Thailand Provinces

Atmosphere ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1024
Author(s):  
Phachirarat Sola ◽  
Uthaiwan Injarean ◽  
Roppon Picha ◽  
Chutima Kranrod ◽  
Chunyapuk Kukusamude ◽  
...  
Keyword(s):  
Building Materials ◽  
Hazard Index ◽  
Radium Equivalent Activity ◽  
Lifetime Cancer Risk ◽  
Safety Standards ◽  
Dose Rates ◽  
External Hazard Index ◽  
Activity Concentrations ◽  
Standard Guideline ◽  
Northeastern Thailand

A total of 223 sand samples collected from seven provinces in Northeastern Thailand were analyzed for their gamma radioactivity from naturally occurring radioactive materials (NORMs), and the data were used to calculate the concentrations of Ra-226, Th-232, and K-40. Radiological safety indicators such as the indoor external dose rates (Din), the annual indoor effective dose (Ein), the activity concentration index (I), the radium equivalent activity (Raeq), the external hazard index (Hex), the internal haphazard index (Hin), and the excess lifetime cancer risk (ELCR) were calculated. The activity concentrations were found to be 36 ± 10 Bq/kg for Ra-226, 2.64 ± 0.58 Bq/kg for Th-232, and 323 ± 168  Bq/kg for K-40. Din is 62 ± 23 nGy/h. The Ein is 0.30 ± 0.11 mSv/y. The activity concentrations and other indicators were reported by each province and compared with the safety standards and are found to be within the safe limits in this study. The results can be used to develop the standard guideline levels for choosing building materials in Thailand.

scholarly journals Using Gamma Spectroscopy to Calculate Radioactive Contaminants in Foreign and Local Tobacco Samples

2020 ◽  
Vol 55 (2) ◽  
Author(s):  
Ahmed F. Mkhaiber ◽  
Auday T. Al-Bayati ◽  
Enas A. Jawad ◽  
Khalid H. Mahdi
Keyword(s):  
Gamma Ray ◽  
Specific Activity ◽  
Gamma Spectroscopy ◽  
Natural Radionuclide ◽  
Germanium Detector ◽  
Average Concentration ◽  
Radium Equivalent Activity ◽  
Lifetime Cancer Risk ◽  
Potassium 40 ◽  
Thorium 232

The normal radioactivity levels of Uranium-238, Thorium-232, and Potassium-40 were calculated for ten types of foreign and local cigarettes available on the Iraqi market using a gamma-ray spectroscopy technique employing the germanium detector system. The results of this study showed that the average specific activity for each of Uranium-238, Thorium-232 and Potassium-40 were 21.689± 4.596, 18.906 ± 4.148, and 430.094 ± 19.449 (Bq/Kg) respectively. The annual effective dose, radium equivalent activity and excess lifetime cancer risk for the studied samples were also calculated, and their rates were 11.582 μsv/y, 81.841 Bq/Kg, and 40.538 people per million per year respectively. The outcomes indicate that the rate of concentration of uranium and thorium is lower than the permissible values, whereas the average concentration of potassium was slightly higher than the permissible values. This research is important because it warns against several types of cigarettes that contain high concentrations of radionuclides, which can lead to infection cancer and then lead to the death of the person who has used it profusely. Therefore, the aim of the current research is to evaluate the radiological risks of radionuclides in tobacco cigarette smoke by evaluating their natural radionuclide concentrations.

Significance of Uranium Series Disequilibrium and Their Radiological Impacts In Abu Garadi Altered Granites.

2021 ◽  
Author(s):  
Mahmoud A. Hussein ◽  
Mahmoud khattab ◽  
Waleed A. El-Said ◽  
Neveen S. Abed ◽  
A. F. Tawfic
Keyword(s):  
Dose Rate ◽  
Hazard Index ◽  
Germanium Detector ◽  
Reduction Zone ◽  
Lifetime Cancer Risk ◽  
External Hazard Index ◽  
Activity Concentrations ◽  
Oxidation Reduction ◽  
Gamma Index ◽  
Radium Equivalent

Abstract Radioactivity of U, Th series and 40K in the collected samples from Abu Garadi area were measured using Hyper Pure Germanium detector Gamma spectrometer (HPGe). 232Th, 226Ra, 40K and 238U contents were determined in the different samples that indicating high uranium high thorium type of these granites. The activity concentrations of 232Th, 238U, 234U/238U activity ratio of the studied altered granites ranged between 1.98 to 4.25 with 2.89 as an average, indicating that the samples passed from the incipience of the oxidation-reduction zone (234U/238U=1.98) to the reduction zone (234U/238U= 4.52). 238U/235U activity ratios showed broad range as a result of the alteration processes. 226Ra and 40K are very important in determination of different environmental hazard impacts. The activity concentrations average of 238U, 232Th, 226Ra and 40K were 6553.7 ± 3.1 Bq kg− 1, 3944 ± 0.9 Bq kg− 1 201.3 ± 1.1 Bq kg− 1 and 619.4 ± 0.02 Bq kg− 1. The absorbed gamma dose rate (D), external hazard index (Hex), annual effective dose rate equivalent, radium equivalent (Raeq), internal hazard index (Hin), gamma index (Iγ) as well as Excess Lifetime Cancer Risk (ELCR) were applied based on the measured radionuclide concentration of the 238U, 232Th, 226Ra and 40K.

Assessment of Radiological Significance of the Wastes Generated from the Triple Super Phosphate (TSP) Fertilizer Factory, Chittagong, Bangladesh

2012 ◽  
Vol 36 (1) ◽  
pp. 79-88 ◽  
Author(s):  
MA Samad ◽  
MI Ali ◽  
D Paul ◽  
SMA Islam
Keyword(s):  
Gamma Ray ◽  
Hazard Index ◽  
Liquid Waste ◽  
Radiation Hazard ◽  
Gamma Ray Spectrometry ◽  
Radium Equivalent Activity ◽  
Average Value ◽  
Liquid Samples ◽  
Activity Concentrations ◽  
Academy Of Sciences

The activity concentration of 226Ra, 232Th and 40K was determined in solid and liquid samples collected from the TSP Fertilizer Factory, Chittagong, Bangladesh. A total of 18 samples of seven different kinds (including liquid and solid wastes) were collected and analyzed by gamma ray spectrometry technique using a high purity germanium (HPGe) detector of 40% relative efficiency. The analysis of the liquid waste samples showed that the average activity concentrations of 226Ra and 232Th were 6.26 ± 0.63 and 10.01 ± 1.39 Bq/L, respectively and no 40K was detected in any of the liquid samples. In the solid waste samples the average value of activity concentrations of 226Ra, 232Th and 40K were 187.49 ± 4.88, 70.06 ± 11.76 and 655.94 ± 110.24 Bq/kg, respectively. Considering the stored wastes as a part of the ambient environment of the factory, radium equivalent activity, radiation hazard index and external annual effective dose to the worker and public due to these wastes were also calculated and compared with world average values. DOI: http://dx.doi.org/10.3329/jbas.v36i1.10923 Journal of Bangladesh Academy of Sciences, Vol. 36, No. 1, 79-88, 2012

Distribution of naturally occurring radionuclides in soil around a coal-based power plant and their potential radiological risk assessment

2019 ◽  
Vol 107 (3) ◽  
pp. 243-259 ◽  
Author(s):  
Md. Ahosan Habib ◽  
Triyono Basuki ◽  
Sunao Miyashita ◽  
Wiseman Bekelesi ◽  
Satoru Nakashima ◽  
...  
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Dose Rate ◽  
Hazard Index ◽  
Contamination Factor ◽  
Soil Samples ◽  
Radiological Risk ◽  
Radium Equivalent Activity ◽  
Lifetime Cancer Risk ◽  
Naturally Occurring

Abstract Coal-fly-ash is one of the major byproducts of coal-based power plant in which naturally occurring radioactive materials (NORMs) are drastically enriched compared to those of feed coals. Thus, improper management of fly-ash may introduce additional radioactivity to the surrounding environment and cause radiological risk. So, in order to study the distribution of radionuclides in soil around a coal-based power plant and to evaluate their radiological risk, soil, coal and fly-ash samples were analyzed by using a HPGe detector for U-238, Ra-226, Th-232 and K-40 radioactivity concentrations. Furthermore, soil minerals were also studied by X-ray diffractometer to assess the mineralogical provenance of the radionuclides. Mean radioactivity concentrations (in Bq·kg−1) of U-238, Ra-226, Th-232 and K-40 in soil samples are 102.9±41.4, 63.6±7.4, 103.4±13.9 and 494.2±107.5, respectively which are comparatively higher than the typical world mean value. Elevated levels of radioactivity are likely due to the presence of illite, kaolinite, monazite, rutile and zircon minerals in the soil samples rather than technogenic contributions from the power plant. Furthermore, mean soil contamination factor (CF) are close to unity and mean pollution load index (PLI) is below unity while the average radium equivalent activity (Raeq in Bq·kg−1), external hazard index (Hex), absorbed γ dose rate (D in nGyh−1), annual effective dose rate (E in mSv·y−1) and excess lifetime cancer risk (ELCR in Sv−1) are 249.5±21.7, 0.67±0.06, 114.2±9.4, 0.20±0.02, 4.9×10−4±0.4×10−4, respectively, which are within the permissible limit. Thus, in terms of radioactivity concentrations and associated environmental and radiological indices, the effect of the power plant is insignificant.

DOSE ASSESSMENT OF NATURAL TERRESTRIAL RADIONUCLIDES IN COMMONLY CONSUMED FOODS IN NORTH INDIA

2020 ◽  
Vol 189 (3) ◽  
pp. 362-370
Author(s):  
Sarabjot Kaur ◽  
Poorvi Maheshwari ◽  
Rohit Mehra
Keyword(s):  
Hazard Index ◽  
Natural Radionuclide ◽  
Food Samples ◽  
Dose Assessment ◽  
North India ◽  
Cereal Grains ◽  
Lifetime Cancer Risk ◽  
Radium Equivalent ◽  
Effective Doses ◽  
Indian Diet

Abstract The present study aimed to record natural radionuclide content in branded food samples representative of a typical North Indian diet. Forty samples of various food items falling into three categories namely, cereal grains, pulses and beverages were collected from the local markets of Punjab. The radiometric analysis was performed using NaI(Tl) scintillator detector. The activity concentrations ranged between 10 ± 1 and 20 ± 5 Bq kg−1 for 226Ra, Below Detectable Limit (BDL) and 10 ± 2 Bq kg−1 for 232Th and 440 ± 56 and 562 ± 70 Bq kg−1 for 40K. The radium equivalent (Raeq) varied from 55 Bq kg−1(corn) to 70 Bq kg−1 (tea) with an average of 62 Bq kg−1. Internal hazard index (HI) was also calculated (0.18–0.24), which was well below the prescribed threshold of one (24). Age-specific annual effective doses were estimated for infants, children and adults. Children were the most sensitive group of population to radionuclide doses from cereal grains. The annual effective doses were further used to calculate the lifetime cancer risk which exceeded the world average of 2.9$\times$10−4 (24). However, the overall results showed that the intake of these dietary products by the general public did not pose any serious health risk.

Natural Radioactivity of Topsoil in Two Granite Areas of Guangzhou, South China

2014 ◽  
Vol 955-959 ◽  
pp. 3691-3695
Author(s):  
Gang Song ◽  
Min Xing Lu ◽  
Qiu Ping Zhu ◽  
Di Yun Chen ◽  
Yong Heng Chen
Keyword(s):  
Effective Dose ◽  
Annual Effective Dose ◽  
Natural Radionuclides ◽  
Hazard Index ◽  
Natural Radionuclide ◽  
Soil Samples ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
External Hazard Index ◽  
Radium Equivalent

The natural radionuclide (238U, 226Ra, 232Th and 40K) concentrations in 152 soil samples were determined from two major granite areas in Guangzhou, using high resolution γ-ray spectroscopic system based on the characteristic spectral peaks. The mean activity values for 238U, 226Ra, 232Th and 40K were found to be 156.6±98.8, 160.9±96.5, 184.8±101.5 and 832.5±493.1 Bq kg–1 dry mass, respectively. The absorbed dose rate (D) calculated from activity concentration of 226Ra, 232Th and 40K ranged from 53.2 to 497.1 nGy h–1 with a mean of 220.7 nGy h–1. The Radium equivalent activity (Raeq), the outdoor annual effective dose and the external hazard index (Ir), which resulted from the natural radionuclides in soil, were also calculated and found to vary from 119.7 to 1117.2 Bq kg–1, from 0.07 to 0.61 mSv and from 0.33 to 3.07, respectively. The radium equivalent activities and the external hazard index in all the soil samples were same as 64.5% higher than the limit of 370 Bq kg–1 and 1.0, respectively. The outdoor annual effective dose was higher than the worldwide mean value of 0.07 mSv.

scholarly journals The Activity Concentrations and Radium Equivalent Activity in Soil Samples Collected from the Eastern Part of Basrah Governorate in Southern Iraq

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Rasha S. Ahmed ◽  
Raghad S. Mohammed ◽  
Rana O. Abdaljalil
Keyword(s):  
Hazard Index ◽  
Soil Samples ◽  
Radiation Hazard ◽  
Radium Equivalent Activity ◽  
Radioactivity Level ◽  
Normal Limits ◽  
Activity Concentrations ◽  
Normal Ranges ◽  
Radium Equivalent ◽  
Southern Iraq

Clay soil samples (0, 30, and 60 cm depths) were collected from two districts (Abu Al Khasib and Ad Dayr) in Basrah governorate in southern Iraq for gamma-ray spectroscopy. The activity concentrations for natural existing radionuclides in 18 soil samples were measured using high-purity germanium detector HPGe. From the obtained results of γ-ray spectroscopy, the 238U activity concentrations were found to be ranging from 2.4 to 5.6 ppm with an average of 3.5 ppm in Abu Al Khasib and ranging from 2.1 to 4.5 ppm with an average of 2.9 ppm in Ad Dayr. 232Th concentrations were ranging from 3.6 to 7.5 ppm with an average of 4.7 ppm in Abu Al Khasib and ranging from 3.7 to 7.9 ppm with an average of 5.0 ppm in Ad Dayr. 40K concentration was ranging from 0.1% to 2.0% with an average of 1.2% in Abu Al Khasib and ranging from 0.9% to 1.8% with an average of 1.3% in Ad Dayr. High 238U and 226Ra concentration levels were recorded in both study regions. The concentrations of 232Th are within the normal limits in both regions. High levels of 40K were recorded in some locations. Generally, in most locations, 40K activity was within normal ranges. The radium equivalent activity, the external hazard index, the internal hazard index, and the radioactivity level index were calculated to estimate the radiation hazard in Basrah. The estimated radiation hazard indices were within normal limits, except the radioactivity level index, which shows elevated values. The obtained results were compared with other countries and with the worldwide median certified values.

scholarly journals Assessment of Environmental Radioactivity in Soil Samples from Kathmandu Valley, Nepal

2021 ◽  
Vol 7 (2) ◽  
pp. 89-96
Author(s):  
P. Lamichhane ◽  
B. Rijal ◽  
P. Shrestha ◽  
B. R. Shah
Keyword(s):  
Hazard Index ◽  
Mean Value ◽  
Northern Region ◽  
Soil Samples ◽  
Radiation Hazard ◽  
Kathmandu Valley ◽  
Hazard Indices ◽  
Radium Equivalent Activity ◽  
Naturally Occurring ◽  
Activity Concentrations

This study was conducted to determine the amount of naturally occurring radioactivity in the soil of Nepal's Kathmandu valley. The activity of naturally occurring radionuclides was determined in these soil samples using a sodium iodide detector. Activity concentrations of 238U, 232Th, and 40K were found in the range: 32.00-111.38 Bq kg-1, 33.52-130.04 Bq kg-1, and 342.50-897.71 Bq kg-1, respectively. These values are well within the permissible range as recommended by UNSCEAR. The soil samples with the highest activity concentrations were primarily found in the valley's northern region. The activity concentrations were also used to calculate the radiation hazard indices: the mean value obtained were 96.63 nGy hr-1 for Absorbed Gamma Dose Rate in Air, 200.04 Bq kg-1 for Radium Equivalent Activity, the 0.12 mSv yr-1 for Annual Effective Dose, and 0.55 for External Hazard Index. These calculated hazard indices were used to estimate the potential radiological health risk from the soil, and the dose rates associated with it were significantly less than their permissible limit. The overall findings indicate no radiological threat to the population's health in the study area. Additionally, the findings of this study provide baseline information on potential radionuclides that contribute mostly for radiation exposure from natural sources.

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