Metrological system for?-ray spectrometry measurement of the specific activity and mass fraction of natural radioactive elements in soil and rock samples

Atomic Energy ◽  
1993 ◽  
Vol 75 (5) ◽  
pp. 853-856
Author(s):  
I. M. Khaikovich ◽  
V. I. Fominykh ◽  
�. M. Krisyuk ◽  
Yu. A. Belyachkov
Keyword(s):  
Mass Fraction ◽  
Specific Activity ◽  
Radioactive Elements ◽  
Rock Samples ◽  
Metrological System ◽  
Spectrometry Measurement

GAMMA- RAY SPECTROSCOPIC AND PIXE ANALYSIS OF BEACH ROCK SAMPLES OF SOUTH EAST COAST OF TAMILNADU, INDIA

2007 ◽  
Vol 17 (03n04) ◽  
pp. 193-203 ◽  
Author(s):  
R. RAVISANKAR ◽  
A. RAJALAKSHMI ◽  
P. ESWARAN ◽  
V. MEENAKASHISUNDRAM ◽  
V. GAJENDIRAN ◽  
...  
Keyword(s):  
East Coast ◽  
Gamma Ray ◽  
Radiation Hazard ◽  
Environmental Toxicity ◽  
Radioactive Elements ◽  
Pixe Analysis ◽  
Geochemical Behavior ◽  
Rock Samples ◽  
Beach Rock ◽  
Mev Protons

Beach rock samples collected from South East Coast of Tamilnadu was analyzed by natural radioactive measurements to detect the presence of radioactive elements. PIXE technique was used to obtain elemental composition of beach rocks. The PIXE analysis was carried out using 1.7 MV tandem accelerators with the energy of 2 MeV protons at Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, Tamilnadu, India. The geochemical behavior of the elements in the region is discussed. The occurrence of the radioactive and non-radioactive elements is discussed for their geological significance. The results were used to assess environmental toxicity of heavy metals and radiation hazard in the study area.

Specific activity and hazards of Archeozoic-Cambrian rock samples collected from the Weibei area of Shaanxi, China

2005 ◽  
Vol 118 (3) ◽  
pp. 352-359 ◽  
Author(s):  
L. Xinwei ◽  
W. Lingqing ◽  
J. Xiaodan ◽  
Y. Leipeng ◽  
D. Gelian
Keyword(s):  
Specific Activity ◽  
Rock Samples

scholarly journals Basic Characteristics of Coal Gangue in a Small-Scale Mining Site and Risk Assessment of Radioactive Elements for the Surrounding Soils

Minerals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 647
Author(s):  
Dun Wu ◽  
Yuanyuan Wang ◽  
Meichen Wang ◽  
Chao Wei ◽  
Guangqing Hu ◽  
...  
Keyword(s):  
Specific Activity ◽  
Northern Region ◽  
Coal Gangue ◽  
Small Scale ◽  
Radioactive Elements ◽  
Surrounding Water ◽  
Mining Site ◽  
Modes Of Occurrence ◽  
The Impact ◽  
Surrounding Soil

The accumulation/improper treatment of coal gangue will not only lead to waste of land, but also cause environmental pollution. Especially the impact of radioactive elements on the surrounding ecological environment is widely concerned by many scholars. In this study, the concentration of radioactive elements (uranium (U) and thorium (Th)) of small-scale coal gangue mining site and surrounding soil in the northern region of Xieqiao coal mine were tested, the material composition of coal gangue was analyzed via XRF and XRD, the modes of occurrence of U and Th elements were investigated, and their potential ecological risks and ecological effectiveness were evaluated. The results show that the clay minerals with high content in coal gangue are the key minerals for the adsorption of uranium and thorium in coal gangue. The specific activity of two radioactive elements (U and Th) in soil is much lower than that of coal gangue. With the increase of the distance from the soil collection point to the gangue piles and the depth of the soil profile, the specific activities of the two radioactive elements decrease gradually. On the basis of the concentration curve, the range of the radioactive contamination halo of gangue piles is limited (≤30 m), speculating qualitatively that the gangue dump has no significant influence on the radioactivity of the surrounding water. The modes of occurrence of U and Th in coal gangue and soil are altered. According to the index of geo-accumulation, Th is easier to accumulate in soil environment, but Th and U pollution in soil is not obvious. In contrast to U element, the active state of Th element in soil is generally affected by exogenous (coal gangue) export, which may have a potential environmental effects. This study provides a research idea for the investigation of radioactive element pollution to the surrounding soil in small-scale coal gangue plies.

scholarly journals Non-radioactive scandium oxide receiving out of uranium ISR solutions

2022 ◽  
Vol 2155 (1) ◽  
pp. 012025
Author(s):  
M K Kylyshkanov ◽  
N N Yaroshenko ◽  
I A Khlebnikova
Keyword(s):  
Specific Activity ◽  
Raw Materials ◽  
Activity Level ◽  
Scandium Oxide ◽  
High Price ◽  
Radioactive Elements ◽  
Radioactive Impurity ◽  
Carbonate Solutions ◽  
Insoluble Compounds

Abstract The task of the research was to study and determine an effective method for the preparation of non-radioactive scandium compounds from uranium In-Situ Recovery (ISR) solutions. The widespread use of scandium is restrained by the high price due to its small production volumes, low content in the raw materials (scandium is a scattered element and does not form its own deposits), as well as the complexity of technological schemes for its extraction. Scandium receiving out of uranium reverses ISR solutions technological scheme was experimental tested, including sorption on MTS 9580 (Purolite’s production) ion exchanger with recurrent ballast impurities desorption and receiving concentrate that contains scandium. New radiation cleaning technological sequencing based on different solubility of radioactive elements and scandium in carbonate solutions, that accompanied by insoluble macro components complex formation, that contains in deactivated scandium concentrate and allows to get scandium oxide with desired component maintenance more than 94 % and less than 0,3 kilobecquerels/kg specific activity level was developed. The developed technology is based on the ability to form soluble carbonate complexes of scandium and radioactive elements, while the main macro components of the concentrate - ferrum, aluminum, calcium, silicon and others under the conditions of carbonation of the concentrate are inert or form insoluble compounds. Optimal radioactive impurity removing from concentrate conditions and scandium leaching from deactivated residue of scandium and macro impurity were studied and identified in laboratory conditions and during pilot tests.

scholarly journals KAJIAN KANDUNGAN RADIOISOTOP ALAM DALAM SAMPEL BATUAN DI DESA OBEN BAUN KUPANG BARAT DENGAN TEKNIK ANALISIS RADIOAKTIVITAS LINGKUNGAN

2018 ◽  
Vol 3 (2) ◽  
pp. 147-154
Author(s):  
Maria Selviana Tay ◽  
Albert Z. Johannes ◽  
Laura A. S. Lapono ◽  
Bartholomeus Pasangka
Keyword(s):  
Field Survey ◽  
Specific Activity ◽  
Mineral Deposit ◽  
Tolerance Limit ◽  
Nuclear Radiation ◽  
Contamination Level ◽  
East Part ◽  
Rock Samples ◽  
Activity Area ◽  
Mass Type

Abstrak Masalah pokok yang dikaji dalam penelitian ini adalah pemetaan dan analisis aktivitas jenis massa kandungan radioisotop dalam deposit mineral di Desa Oben Baun Kupang Barat. Tujuan Penelitian meliputi: menentukan kisaran cacah radiasi radioisotop alam di beberapa titik pengukuran di lapangan dan pengukuran di laboratorium, menentukan kisaran aktivitas jenis  massa (C) kandungan radioisotop dalam sampel batuan, memetakan sebaran cacah dan aktivitas jenis massa radioisotop pada luasan daerah  tertentu yang terjangkau survei di lapangan, dan mengestimasi tingkat kontaminasi radioaisotop pada lingkungan. Metode penelitian meliputi: observasi/ survei, mapping, sampling, analisis, interpretasi. Hasil-hasil penelitian: Kisaran cacah radiasi nuklir radioisotop di lapangan dan dilaboratorium dalam deposit mineral di Oben Baun Kupang Barat berturut-turut berkisar antara 15 cpm sampai dengan 93 cpm dan 28 cpm sampai dengan 92 cpm. Kisaran aktivitas jenis massa (C) kandungan radioisotop dalam 45 cuplikan sampel batuan di Oben Baun Kupang Barat berkisar antara 0,099 x 10-5 µCi/gram sampai dengan 0,316 x 10-5 µCi/gram. Sebaran atau distribusi kandungan radioisotop di Desa Oben Baun Kupang Barat yang dapat dijangkau survei terdistribusi lebih tinggi dari arah timur dan cenderung menurun ke arah barat. Distribusi tersebut masih cenderung tinggi ke arah utara di bagian timur lokasi survei. Kontaminasi radioisotop pada lingkungan masih tergolong kontaminasi rendah untuk radiasi alpha dan beta, dan secara umum cacah radiasi radioisotop di lapangan masih bersesuaian dengan  batas toleransi, walaupun perlu diwaspadai beberapa titik ukur dengan cacah radiasi melebihi standar. Kata Kunci: Radioisotop, Aktivitas Jenis Massa, Daerah Kontaminasi.                                                                        Abstract The main problem studied in this research was mapping and analizing of mass specific activity of radioisotope content in mineral deposit at Oben Village Baun West Kupang. The aims of research comprise of: to determine radiation counts range of natural radioisotope at several measurement points at field and Laboratory, to determine counts and massa specific activity range of radioisotope content in rocks sample,  to map distribution of counts and  mass specific activity on area which was reached of field survey, and to estimate contamination level of radioisotope on environment. The methods of research consists of: Observatlion/ surveying, mapping, sampling, analyis, and interpretation. The results of research: The counts range of nuclear radiation of radioisotope at field and laboratory in mineral deposit at Oben Baun West Kupang in succession revolved between 15 cpm up to 93 cpm and 28 cpm up to 92 cpm. The range of mass speciific activity of radioisotope content in 45 rock samples at Oben Baun West Kupang revolved berween 0,099 x 10-5µCi/gram up to 0,316 x 10-5 µCi/gram. The distribution of radioisotope content at Oben Village Baun West Kupang which can be reached survey higher distributed from east direction and inclined decrease to west direction. These distribution still high inclined to nort direction at east part of survey location. Radioisotope contamination on environment still classified low contamination for alpha and beta radaition, and generally radiation counts of radioisotope at the field still to be appropriated with tolerance limit, although was necessary waried several measurement points with radiastion counts exceed of standard.                      Keywords : Radioisotope, Mass Type Activity, Area Contamination.

scholarly journals Study on natural radioactive elements in soil and rock samples around Mandya district, India

2012 ◽  
Vol 35 (1) ◽  
pp. 29 ◽  
Author(s):  
L Paramesh ◽  
TS Shashikumar ◽  
BC Shivakumara ◽  
MS Chandrashekara
Keyword(s):  
Radioactive Elements ◽  
Rock Samples

scholarly journals Distribution of radionuclides in modern sediments of the rivers flowing into the Dnieper-Bug Estuary

2021 ◽  
Vol 280 ◽  
pp. 11003
Author(s):  
Tetiana Alokhina ◽  
Vadym Gudzenko
Keyword(s):  
Large Scale ◽  
Granulometric Composition ◽  
Specific Activity ◽  
Natural Radionuclides ◽  
Baseline Data ◽  
Water Bodies ◽  
Radioactive Elements ◽  
Granulometric Analysis ◽  
Pelitic Fraction

The article presents the results of large-scale studies of the content and distribution of natural and man-made radionuclides in the sediments of the rivers flowing into the Dnieper-Bug estuary. The article also presents the results of the granulometric analysis of the surveyed water bodies. The data about natural radioactive elements in the sediments rivers flowing into the Dnieper-Bug estuary obtained in this research are demonstrated moderate specific activity, which, however, clearly correlates with the granulometric composition of sediments. The 137Cs determined by us is contained in the sediments of all studied water bodies and the places of it greatest concentration coincide with the areas in which the sediment is represented mainly by the pelitic fraction. The data obtained in this research can serve as a baseline data in natural radionuclides concentration in sediments rivers flowing into the Dnieper-Bug estuary. The obtained data can also be used for further monitoring of the specific activity of man-made radionuclides, in particular 137Cs.

scholarly journals KAJIAN KANDUNGAN RADIOISOTOP ALAM DALAM SAMPEL BATUAN DI DESA OBEN BAUN KUPANG BARAT DENGAN TEKNIK ANALISIS RADIOAKTIVITAS LINGKUNGAN

2018 ◽  
Vol 3 (3) ◽  
pp. 147-154
Author(s):  
Maria Selviana Tay ◽  
Albert Z. Johannes ◽  
Laura A. S. Lapono ◽  
Bartholomeus Pasangka
Keyword(s):  
Field Survey ◽  
Specific Activity ◽  
Mineral Deposit ◽  
Tolerance Limit ◽  
Nuclear Radiation ◽  
Contamination Level ◽  
East Part ◽  
Rock Samples ◽  
Activity Area ◽  
Mass Type

Abstrak Masalah pokok yang dikaji dalam penelitian ini adalah pemetaan dan analisis aktivitas jenis massa kandungan radioisotop dalam deposit mineral di Desa Oben Baun Kupang Barat. Tujuan Penelitian meliputi: menentukan kisaran cacah radiasi radioisotop alam di beberapa titik pengukuran di lapangan dan pengukuran di laboratorium, menentukan kisaran aktivitas jenis  massa (C) kandungan radioisotop dalam sampel batuan, memetakan sebaran cacah dan aktivitas jenis massa radioisotop pada luasan daerah  tertentu yang terjangkau survei di lapangan, dan mengestimasi tingkat kontaminasi radioaisotop pada lingkungan. Metode penelitian meliputi: observasi/ survei, mapping, sampling, analisis, interpretasi. Hasil-hasil penelitian: Kisaran cacah radiasi nuklir radioisotop di lapangan dan dilaboratorium dalam deposit mineral di Oben Baun Kupang Barat berturut-turut berkisar antara 15 cpm sampai dengan 93 cpm dan 28 cpm sampai dengan 92 cpm. Kisaran aktivitas jenis massa (C) kandungan radioisotop dalam 45 cuplikan sampel batuan di Oben Baun Kupang Barat berkisar antara 0,099 x 10-5 µCi/gram sampai dengan 0,316 x 10-5 µCi/gram. Sebaran atau distribusi kandungan radioisotop di Desa Oben Baun Kupang Barat yang dapat dijangkau survei terdistribusi lebih tinggi dari arah timur dan cenderung menurun ke arah barat. Distribusi tersebut masih cenderung tinggi ke arah utara di bagian timur lokasi survei. Kontaminasi radioisotop pada lingkungan masih tergolong kontaminasi rendah untuk radiasi alpha dan beta, dan secara umum cacah radiasi radioisotop di lapangan masih bersesuaian dengan  batas toleransi, walaupun perlu diwaspadai beberapa titik ukur dengan cacah radiasi melebihi standar. Kata Kunci: Radioisotop, Aktivitas Jenis Massa, Daerah Kontaminasi.                                                                        Abstract The main problem studied in this research was mapping and analizing of mass specific activity of radioisotope content in mineral deposit at Oben Village Baun West Kupang. The aims of research comprise of: to determine radiation counts range of natural radioisotope at several measurement points at field and Laboratory, to determine counts and massa specific activity range of radioisotope content in rocks sample,  to map distribution of counts and  mass specific activity on area which was reached of field survey, and to estimate contamination level of radioisotope on environment. The methods of research consists of: Observatlion/ surveying, mapping, sampling, analyis, and interpretation. The results of research: The counts range of nuclear radiation of radioisotope at field and laboratory in mineral deposit at Oben Baun West Kupang in succession revolved between 15 cpm up to 93 cpm and 28 cpm up to 92 cpm. The range of mass speciific activity of radioisotope content in 45 rock samples at Oben Baun West Kupang revolved berween 0,099 x 10-5µCi/gram up to 0,316 x 10-5 µCi/gram. The distribution of radioisotope content at Oben Village Baun West Kupang which can be reached survey higher distributed from east direction and inclined decrease to west direction. These distribution still high inclined to nort direction at east part of survey location. Radioisotope contamination on environment still classified low contamination for alpha and beta radaition, and generally radiation counts of radioisotope at the field still to be appropriated with tolerance limit, although was necessary waried several measurement points with radiastion counts exceed of standard.                      Keywords : Radioisotope, Mass Type Activity, Area Contamination.

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.

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