scholarly journals Radioactivity, Metals Pollution and Mineralogy Assessment of a Beach Stretch from the Ionian Coast of Calabria (Southern Italy)

2021 ◽  
Vol 18 (22) ◽  
pp. 12147
Author(s):  
Francesco Caridi ◽  
Giuseppe Paladini ◽  
Valentina Venuti ◽  
Vincenza Crupi ◽  
Salvatore Procopio ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Gamma Ray ◽  
Specific Activity ◽  
Natural Radionuclides ◽  
Absorbed Dose ◽  
Contamination Factor ◽  
Chemical Pollution ◽  
Absorbed Dose Rate ◽  
X Ray ◽  
Metals Pollution

In the present article, a case study is reported regarding an investigation carried out in order to assess radioactivity concentration, heavy metals pollution and mineralogy of a beach stretch extending from Soverato to Squillace municipalities of the Ionian coast of Calabria, South of Italy, a popular tourist destination, especially in summer. The analysis of radionuclides contents was performed by using a High Purity Germanium (HPGe) gamma-ray detector, in order to quantify the average specific activity of 226Ra, 232Th and 40K natural radionuclides and 137Cs anthropogenic radioisotope. The absorbed dose rate and the annual effective dose equivalent radiological hazard indices were also estimated. Furthermore, X-ray Fluorescence (XRF) spectrometry measurements were carried out for the quantitative elemental analysis of the sand, in order to investigate any possible chemical pollution by heavy metals. For this aim, different indices such as Enrichment Factor (EF), Geoaccumulation Index (Igeo), Contamination Factor (CF) and Pollution Load Index (PLI) were applied to estimate the level of toxicity imposed on the ecosystem by the detected heavy metals. Finally, in order to identify the crystalline mineral components of the investigated sand samples, X-ray Diffraction (XRD) and Micro-Raman Scattering (MRS) measurements were carried out.

ESTIMATION OF RADIOLOGICAL HAZARDS DUE TO NATURAL RADIONUCLIDES FROM THE ROSTERMAN GOLD MINE TAILINGS, LURAMBI, KAKAMEGA, KENYA

2020 ◽  
Vol 190 (3) ◽  
pp. 324-330
Author(s):  
C K Wanyama ◽  
F W Masinde ◽  
J W Makokha ◽  
S M Matsitsi
Keyword(s):  
Gamma Ray ◽  
Natural Radionuclides ◽  
Absorbed Dose ◽  
Spectrometric Analysis ◽  
Gold Mine ◽  
Absorbed Dose Rate ◽  
Radiological Hazards ◽  
Naturally Occurring Radionuclides ◽  
Gold Mine Tailings ◽  
Radiological Health

Abstract Radiological hazards associated with naturally occurring radionuclides in materials from Rosterman gold mine were assessed by analysis of 30 samples. The gamma-ray spectrometric analysis of tailing samples reported an average activity concentration of 263 ± 13, 123 ± 6 and 84 ± 4 Bq kg−1 for 40K, 232Th and 226Ra, respectively. The average absorbed dose rate was 124 ± 6 nGy h−1, while the annual effective dose of 0.4 ± 0.02 mSv y−1 for indoor and 0.3 ± 0.01 mSv y−1 for outdoor were reported. The mean and range of radiological parameters (external and radium equivalent) calculated from the tailing samples were within the permissible limits and hence mining of gold at Rosterman has no significant radiological health implication on the miners and the surrounding population.

scholarly journals Physicochemical and radiological characterization of kaolin and its polymerization products

2018 ◽  
Vol 68 (330) ◽  
pp. e155
Author(s):  
M. Ivanović ◽  
Lj. Kljajević ◽  
M. Nenadović ◽  
N. Bundaleski ◽  
I. Vukanac ◽  
...  
Keyword(s):  
Dose Rate ◽  
Photoelectron Spectroscopy ◽  
Specific Activity ◽  
Physicochemical Characterization ◽  
Natural Radionuclide ◽  
Absorbed Dose ◽  
Raw Material ◽  
Absorbed Dose Rate ◽  
X Ray

The aim of this study was determination of physical-chemical and radiological characteristics of kaolin and products of alkali-activated thermally treated kaolin (geopolymer). Also, the objective of presented research was to investigate the possibility of kaolin application as a pigment or as a raw material for obtaining geopolymer materials as a relatively new ones in a building material industry. Physicochemical characterization of one set of samples was conducted using X-ray diffraction (XRD), Fourier transform infra - red (FTIR) and X-ray photoelectron spectroscopy (XPS). Activity concentration of naturally occurring radionuclides in kaolin, metakaolin and geopolymer were determined. The absorbed dose rate (D) and the annual effective dose rate (EDR), calculated in accordance with the UNSCEAR 2000 report, are also presented in this paper. Kaolin was heat-treated on 750oC and specific activity of natural radionuclide in metakaolin increased up to 1.6, while measured specific activities in geopolymer were the lowest.

scholarly journals Measurement of Natural and Artificial Radioactive Elements in Soil  at the Southern Al-Dora Region, Baghdad Governorate, Iraq: حساب تركيز النظائر المشعة الطبيعية والصناعية لنماذج تربة جنوب منطقة الدورة  في محافظة بغداد، العراق

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Basim Khalaf Rejah, Afrah Hassoon Oraibi, Abdalrahman Al-Sal
Keyword(s):  
Gamma Ray ◽  
Specific Activity ◽  
Absorbed Dose ◽  
Radiological Hazard ◽  
Radioactive Elements ◽  
Hazard Indices ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Gamma Ray Detector ◽  
Radiological Hazard Indices

The specific activity of natural and artificial radioactive elements in nine soil samples at different locations of southern Al-Dora region, Baghdad governorate, Iraq were measured and analysed by using a gamma ray detector NaI (Tl). The average activity concentrations of 238U, 232Th, 40K and 137Cs are found to be 38.22 Bq/Kg, 42.99 Bq/Kg, 16.64 Bq/Kg and 2.92 Bq/Kg, respectively. Several radiological hazard indices including radium equivalent activity (Raeq), absorbed dose rate (D), internal (Hin) and external (Hex) hazard indices, internal (AEDEin) and external (AEDEex) annual effective dose equivalent and gamma ray index (Iγr) are calculated. The findings of all radiological hazard indices are lower than their international values. This study discloses that most locations in study area are safe from any radiological risks.

scholarly journals Assessment of nuclear radiation pollution in uranium mining-impacted soil

2019 ◽  
Vol 11 (22) ◽  
pp. 40-50
Author(s):  
Raad Obid Hussein Houmady
Keyword(s):  
Dose Rate ◽  
Gamma Ray ◽  
Specific Activity ◽  
Ground Surface ◽  
Absorbed Dose ◽  
Nuclear Radiation ◽  
Uranium Mine ◽  
Radiological Protection ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity

Activities associated with mining of uranium have generated significant quantities of waste materials containing uranium and other toxic metals. A qualitative and quantitative study was performed to assess the situation of nuclear pollution resulting from waste of drilling and exploration left on the surface layer of soil surrounding the abandoned uranium mine hole located in the southern of Najaf province in Iraq state. To measure the specific activity, twenty five surface soil samples were collected, prepared and analyzed by using gamma- ray spectrometer based on high counting efficiency NaI(Tl) scintillation detector. The results showed that the specific activities in Bq/kg are 37.31 to 1112.47 with mean of 268.16, 0.28 to 18.57 with mean of 6.68 and 132.25 to 678.33 with mean of 277.49 for 238U, 232Th and 40K respectively. Based on these values, radium equivalent activity in Bq/kg and absorbed dose rate one meter above the ground surface nGy/h were calculated and found to be vary 52.72 to 1189.84 and from 25.02 to 553.01. The indoor and outdoor annual effective dose rate in mSv/y ranged from 0.12 to 2.71 and from 0.03 to 0.67 respectively. To evaluate the dangerous of the study area, the external (Hex) and internal (Hin) hazard indexes are calculated and found to be ranged 0.14 to 3.21 and from 0.24 to 6.22. For the purpose of assessing the seriousness of the study area, results were compared with the world wide average. This comparison indicated that the study area is not safe from the radiological protection point view.

scholarly journals Specific activities and radiation hazard parameters calculations of natural radionuclides in AL-Mustansiriyah university soils using NaI(Tl) detector

2019 ◽  
Vol 14 (30) ◽  
pp. 172-179
Author(s):  
Nada Farhan Kadhim
Keyword(s):  
Gamma Ray ◽  
Natural Radionuclides ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Soil Samples ◽  
Radiation Hazard ◽  
Absorbed Dose Rate ◽  
External Hazard Index ◽  
Specific Activities ◽  
Hazard Parameters

The specific activities of the natural radionuclides U-238 and Th-232 and K-40 in 14 soil samples collected from different sites fromAL-Mustansiriyah university at two depths (topsoil "surface" and20cm depth) were be investigated using gamma ray spectrometer3"x3" NaI(Tl) scintillation detector.The analysis of the energy spectra of the soil samples show thatthese samples have specific activities ranging with (16.08-51.11)Bq/kg for U-238, (14.79-52.29) Bq/kg for Th-232 and (191.08-377.64) Bq/kg for K-40, with an average values of 29.37, 34.14 and289.62 Bq/kg for U-238, Th-232, k-40 respectively. The radiationhazard parameters of the natural radionuclides; radium equivalentactivity (Raeq), gamma absorbed dose rate (Dγ), annual effective doserate (Eγ), internal and external hazard index (Hin, Hex) have also beencalculated. The maximum value of specific activities and hazardparameters was found in the sample of the soil gathered from theLiterature college center. All the calculated specific activates valueswere be in the ranges of worldwide averages, and below than theglobal permissible limits, this would indicate that the soils of theUniversity is safety for both students and staff.

scholarly journals NATURAL RADIATION ABSORBED DOSE RATE AND RADIATION TRANSFER FACTOR FROM SOIL TO VEGETABLE IN SOME SELECTED AREAS OF CHITTAGONG, BANGLADESH

2021 ◽  
Vol 56 (4) ◽  
pp. 659-672
Author(s):  
Sk. A. K. Arafin ◽  
Md. Sapan Bhuiyan ◽  
Jannatul Ferdous ◽  
M. Ashraful Hoque ◽  
A. K. M. Rezaur Rahman ◽  
...  
Keyword(s):  
Dose Rate ◽  
Natural Radioactivity ◽  
Transfer Factor ◽  
Gamma Ray ◽  
Natural Radionuclides ◽  
Absorbed Dose ◽  
Gamma Ray Spectrometry ◽  
Absorbed Dose Rate ◽  
Anthropogenic Radionuclides ◽  
Transfer Factors

The study aimed to investigate natural radioactivity levels and Transfer Factors of natural radionuclides from soil to some plants in Chittagong, Bangladesh. The concentrations of naturally occurring and anthropogenic radionuclides in soil and plants were measured in this work to determine the absorbed dose rate and the transfer factors of radionuclides from soil to plant. Plants (Spinach and Vegetables) and corresponding soil samples were collected from three different locations in Chittagong (Nasirabad, Sitakunda, and Halda Agrotechnology), and the concentrations of activity of natural radionuclides were measured using gamma-ray spectrometry. The average absorbed dose rate in the soil of Nasirabad, Sitakunda, and Halda Agrotechnology are 49.84 nGyh-1, 37.4 nGyh-1, and 45.6 nGyh-1. The average transfer factor from soil to plants, recorded for 238U, 232Th, and 40K of these study areas, are 0.461, 0.400, and 3.10, respectively. The ratio of soil to plant transfer factor for the present study compared with some previous work. The Transfer Factor of 40K gives some high value but does not exceed the limit of the different published values. Because there are no existing databases for the natural radioactivity in soil and plants from Chittagong, Bangladesh, our results are establishing a database for the Chittagong, Bangladesh soil and plants. This data may be used as a database for further investigation for the betterment of public health.

Radioactivity concentrations and dose assessments of therapeutic peloids from some Turkish spas

Clay Minerals ◽  
2015 ◽  
Vol 50 (2) ◽  
pp. 221-232 ◽  
Author(s):  
Muazzez Çelik Karakaya ◽  
Mahmut Doğru ◽  
Necati Karakaya ◽  
Hasibe Cingilli Vural ◽  
Fatih Kuluöztürk ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Natural Radionuclides ◽  
Absorbed Dose ◽  
Absorbed Dose Rate ◽  
Gamma Ray Spectrometer ◽  
Activity Concentrations ◽  
Gonadal Dose ◽  
Radium Equivalent ◽  
Average Activity ◽  
Dose Assessments

AbstractThe activity concentrations of natural radionuclides in peloids were studied to assess the radiologic hazard from 18 Turkish spas. The peloids are mainly used for therapeutic treatments, rheumatic diseases and aesthetic purposes. The concentrations of the natural radionuclides 226Ra, 232Th, 40K and 137Cs were determined with a gamma ray spectrometer using a HPGe detector. The average activity concentrations of 226Ra, 232Th, 40K, and 137Cs in the peloids studied were 110.69, 71.52, 576.48 and 0.447 Bq/kg, respectively. The radium equivalent activities in the peloid samples ranged from 63.3 to 766.77 Bq/kg. The absorbed dose rate (Dout) varied between 37.52 and 330.67 nGy/h and most of the observed spa doses are greater than the worldwide recommended values. The annual effective dose values range from 0.26 to 2.78 μSv/y. The annual gonadal dose equivalents of the samples vary from 224.07 to 2283.55 with a mean of 821.99 μSv/y.

Natural radioactivity in some building materials and assessment of the associated radiation hazards

2018 ◽  
Vol 106 (1) ◽  
pp. 79-86
Author(s):  
Amira Kasumović ◽  
Ema Hankić ◽  
Amela Kasić ◽  
Feriz Adrović
Keyword(s):  
Building Materials ◽  
Gamma Ray ◽  
Absorbed Dose ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Radiation Hazards ◽  
Eu Member States ◽  
Gamma Ray Spectrometer ◽  
Radioactive Nuclides ◽  
Specific Activities

AbstractThe results of the specific activities of232Th,226Ra and40K measured in samples of commonly used building materials in Bosnia and Herzegovina are presented. Measurements were performed by gamma-ray spectrometer with coaxial HPGe detector. The surface radon exhalation and mass exhalation rates for selected building materials were also measured. The determined values of specific activities were in range from 3.16±0.81 Bq kg−1to 64.79±6.16 Bq kg−1for232Th, from 2.46±0.95 Bq kg−1to 53.89 ±3.67 Bq kg−1for226Ra and from 28.44±7.28 Bq kg−1to 557.30±93.38 Bq kg−1for40K. The radium equivalent activity, the activity concentration index, the external and internal hazard indices as well as the absorbed dose rate in indoor air and the corresponding annual effective dose, due to gamma-ray emission from the radioactive nuclides in the building material, were evaluated in order to assess the radiation hazards for people. The measured specific activities of the natural radioactive nuclides in all investigated building materials were compared with the published results for building materials from other European countries. It can be noted that the results from this study are similar to the data for building materials from neighbouring countries and for building materials used in the EU Member States. The radiological hazard parameters of the building materials were all within the recommended limits for safety use.

scholarly journals Improvement of Spatial Modeling of Cr, Pb, Cd, As and Ni in Soil Based on Portable X-ray Fluorescence (PXRF) and Geostatistics: A Case Study in East China

2019 ◽  
Vol 16 (15) ◽  
pp. 2694 ◽  
Author(s):  
Xia ◽  
Hu ◽  
Shao ◽  
Xu ◽  
Zhou ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Hot Spots ◽  
Ordinary Kriging ◽  
Eastern China ◽  
Indicator Kriging ◽  
Polluted Water ◽  
X Ray ◽  
Soil Heavy Metals ◽  
Metals Pollution ◽  
Heavy Metals Pollution

To verify the feasibility of portable X-ray fluorescence (PXRF) for rapidly analyzing, assessing and improving soil heavy metals mapping, 351 samples were collected from Fuyang District, Hangzhou City, in eastern China. Ordinary kriging (OK) and co-ordinary kriging (COK) combined with PXRF measurements were used to explore spatial patterns of heavy metals content in the soil. The Getis-Ord index was calculated to discern hot spots of heavy metals. Finally, multi-variable indicator kriging was conducted to obtain a map of multi-heavy metals pollution. The results indicated Cd is the primary pollution element in Fuyang, followed by As and Pb. Application of PXRF measurements as covariates in COK improved model accuracy, especially for Pb and Cd. Heavy metals pollution hot spots were mainly detected in northern Fuyang and plains along the Fuchun River in southern Fuyang because of mining, industrial and traffic activities, and irrigation with polluted water. Area with high risk of multi-heavy metals pollution mainly distributed in plain along the Fuchun River and the eastern Fuyang. These findings certified the feasibility of using PXRF as an efficient and reliable method for soil heavy metals pollution assessment and mapping, which could contribute to reduce the cost of surveys and pollution remediation.

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.

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