Feasibility of ZrSiO4 as reference signature in naturally-occurring radioactive elements for the application of radioactivity monitoring

Chemosphere ◽  
2021 ◽  
pp. 131942
Author(s):  
Deepankara V. Shastri ◽  
John Donald Raj J ◽  
Kantha D. Arunachalam
Keyword(s):  
Radioactive Elements ◽  
Naturally Occurring ◽  
Radioactivity Monitoring ◽  
Reference Signature

scholarly journals Measurement and Analysis of Natural Radioactive Elements in Salty Sediments from Central and Southern Iraq

2021 ◽  
pp. 3911-3920
Author(s):  
Mahdi Hadi Jasim ◽  
Afrah Essa Ramadan ◽  
Nessrian Ali Hussain
Keyword(s):  
Structural Characteristics ◽  
Radiation Hazard ◽  
Radioactive Elements ◽  
X Ray Diffraction ◽  
Radioactive Materials ◽  
Dose Rates ◽  
Naturally Occurring ◽  
Measurement And Analysis ◽  
South Of Iraq ◽  
Southern Iraq

Purification of fifteen NaCl samples from natural and different area in the middle and south of Iraq are prepared  and studied the structural characteristics of samples by powder X-ray diffraction analysis at 𝛌=1.542Ã…. The present work considered the specific activities of naturally occurring radioactive materials in salt samples, which are measured and analyzed using high resolution HPGe system. Also, the radiological parameters have been considered in this work. The average specific concentration (in Bq.kg-1) of the salt samples is found 16.864.92 for 226Ra, 5.972.05 for 232Th and 9.852.8 for 40K, respectively, which are below the national levels, 40Bq.kg-1, 30Bq.kg-1 and 400Bq.kg-1, respectively (UNSCEAR, 2000). Similarly the absorb dose rates are in the range3.71 nGy.h-1 to 12.591nGy.h-1.The measured radiation hazard indices show that the concentrations of these radionuclides in all samples are within the allowable limits.

scholarly journals Assessment of Trace Elements in Soils and Sediments in the Abandoned Mercury Mine Site in Puerto Princesa City, Philippines

2021 ◽  
Vol 38 (2) ◽  
Author(s):  
Jessie Samaniego ◽  
Cris Reven Gibaga ◽  
Alexandria Tanciongco ◽  
Rasty Rastrullo
Keyword(s):  
Heavy Metals ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Contamination Factor ◽  
Area Measurement ◽  
Open Pit ◽  
Radioactive Elements ◽  
Mercury Mine ◽  
Naturally Occurring ◽  
Soil And Sediment

An abandoned mercury mine area in Puerto Princesa City, which was previously operated by Palawan Quicksilver Mines, Inc. (PQMI) from 1953 to 1976, is known for its unrehabilitated open-pit of mercury-rich rocks and exposed mine waste calcine stockpiles in the vicinity. In order to establish an understanding on the geology of the abandoned mercury mine deposit and to obtain clues in determining the possible metal pollutants in the area, measurement of trace element concentrations of soil and sediments collected from the PQMI vicinity were conducted. Soil and sediment samples were analyzed for heavy metals, rare-earth elements and naturally occurring radioactive elements and determined its contamination factor as part of risk assessment. Analytical results showed that aside from mercury, several heavy metals (nickel, chromium, manganese) were found to be anomalous due to the geology of the area. Statistical analyses show that chromium, nickel and antimony present the highest contamination factor among the sampling groups. Mercury is found to have negative bias with higher rare earth elements concentration but positively correlated with arsenic, antimony, and thallium. In general, there is low concentration of rare earth elements (except for scandium) in comparison with its respective average crustal concentration. Due to the nature of geology in the area, naturally occurring radioactive elements influence is also minimal. The results of this study, especially on the assessment of soil and sediment pollutants, are recommended as guidance to its mine rehabilitation.

An overview on radiometric assessment and excess lifetime cancer risk of soil in Pakistan by using High Purity Germanium (HPGe) detector

2020 ◽  
Vol 35 (4) ◽  
pp. 531-543
Author(s):  
Jalil ur Rehman ◽  
Iftikhar Alam ◽  
Nisar Ahmad ◽  
Aslam Hameed ◽  
Alia Nazir ◽  
...  
Keyword(s):  
Cancer Risk ◽  
Gamma Rays ◽  
Human Body ◽  
Natural Radioactivity ◽  
High Purity ◽  
Hpge Detector ◽  
Permissible Limit ◽  
Radioactive Elements ◽  
Naturally Occurring ◽  
High Purity Germanium

AbstractObjectivesThe aim of this study is to compare the natural radioactivity and excess life time cancer risk (ELCR) factor of soil in different regions of Pakistan during last decade. Soil contains various elements and compounds including naturally occurring radioactive elements (238U, 232Th, 40K and 137Cs). Human being, animals and plants are in health risk by contaminations of natural radioactivity in soil and environmental radiometric pollution. Transferring of large amount of the natural radioactive elements in human body by nutrients may cause carcinogenic effects in human body. Pakistani soil has six types as Indus Basin Soil, Bongar Soil, Khaddar Soil, Indus delta soil, Mountainous soil and Sandy Desert Soil. In some northern region of Pakistan, naturally occurring radioactive rocks like uranuium-238 and iridium concentrations present in Gharwandi, Aram, Kingri S, Vitakri Fort Munro, Dera Bugti, Kohlu and Sibbi districts.MethodsIn this reviewed data, gamma rays spectroscopy used to determine the concentrations of 238U, 232Th and 40K with the help of High Purity Germanium (HPGe) detectors. Only the data of HPGe detector collected because of comparisons of different regions of Pakistan.Results and conclusionsMostly, different gamma rays energy peaks of relevant daughter radionuclides of radioactive element were used such as the energy peak lines of daughter radionuclides 214Pb (295.21 and 352 KeV) and 214Bi (609 and 1,120 KeV) used for calculating the 226Ra concentration in soil. In the recent study, it is concluded that average values of concentrations of natural radioactivity in soil in central and north regions of Pakistan are higher than permissible limit but found permissible range in south region of Pakistan. Mean values of ELCR factor were found higher, equal and lower in central, north and south regions than permissible limit, respectively. Generally, no serious health hazard due to natural radioactivity in soil were found.

A Progress Report on the Dating of Archaeological Sites by Means of Radioactive Elements

1948 ◽  
Vol 13 (4Part1) ◽  
pp. 281-286 ◽  
Author(s):  
Robert S. Merrill
Keyword(s):  
Large Field ◽  
Archaeological Sites ◽  
Archaeological Remains ◽  
Radioactive Elements ◽  
Naturally Occurring ◽  
Dating Methods ◽  
Archaeological Materials ◽  
Recent Developments ◽  
Ancient Rock ◽  
Rock Strata

The importance of being able to date accurately the remains of past societies has long been recognized by archaeologists. The problem has always been to find methods that work in the absence of historical records. Recent developments, such as tree-ring dating, have been great contributions, but they are not applicable everywhere. There is still a great need for new methods to supplement and extend the range of present dating procedures.A large field of knowledge so far largely unexplored for possible dating methods is the physics and chemistry of archaeological remains. One area in this field is the study of naturally occurring radioactive elements. Some of these elements have been used by geologists to date ancient rock strata, but applications to archaeological materials have not been made. Recently, however, two possible methods for using radioactive elements to date archaeological remains have been proposed on theoretical grounds. It is not yet definitely known whether they will work, or how well. Further research is necessary.

scholarly journals RADON: GEOINFORMATION FOR THE PLANNING OF URBAN – SUBURBAN REGIONS. THE CASE OF NAFPLION CITY, GREECE

2017 ◽  
Vol 43 (3) ◽  
pp. 1457
Author(s):  
A. Koukoulis ◽  
D.E. Karageorgiou
Keyword(s):  
Soil Depth ◽  
Health Hazard ◽  
Radioactive Elements ◽  
Tectonic Structures ◽  
Γ Radiation ◽  
Naturally Occurring ◽  
Geophysical Surveys ◽  
Survey Results ◽  
Radiation Measurements ◽  
Of Greece

Radon is trapped in the terrestrial cover as a transmutation product of natural radioactive elements. It is directly related to the geotectonic environment and the atmosphere contains traces of radon near the ground, as a result of emanations from soil and rocks, both of which contain minute quantities of radium; it also infiltrates into the ground and circulates in groundwater. Because naturally occurring radon gas has come to be recognised as a potentially serious health hazard, especially in the built environment, a radon and radiometric (α- and γ-radiation) survey was carried out in the urban and suburban region of Nafplion, using the same grid of 500 x 500 m that was used by other methods, i.e., urban geochemical and geophysical surveys. Radon was measured down to a soil depth of 50 cm, and at each site α- and γ-radiation measurements were taken. The survey results have shown that these concentrations are low compared to other regions of Greece. However, potential accumulations of radon in closed underground spaces cannot be excluded. The isoradon contours of these concentrations form anisotropy axes of main NW to NE and N-S direction related to geological-tectonic structures.

Naturally occurring heavy radioactive elements in the geothermal microcosm of the Los Azufres (Mexico) volcanic complex

2015 ◽  
Vol 139 ◽  
pp. 33-42 ◽  
Author(s):  
W.A. Abuhani ◽  
N. Dasgupta-Schubert ◽  
L.M. Villaseñor ◽  
D. García Avila ◽  
L. Suárez ◽  
...  
Keyword(s):  
Volcanic Complex ◽  
Radioactive Elements ◽  
Naturally Occurring
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