Article
Chemistry, Analytical
A. Pyngrope, A. Saxena, A. Khardewsaw, Y. Sharma, B. K. Sahoo
Summary: The variation of radon mass exhalation rate (J(m)) and thoron surface exhalation rate (J(s)) with soil's porosity and moisture content was studied using a scintillation based monitor-Smart RnDuo. Results showed that there was no convincing trend of variation with porosity, while with respect to moisture content, there was a sporadic increase observed in the values of J(m) and J(s) up to a certain level, beyond which a decreasing trend was observed.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Environmental Sciences
Petr S. Miklyaev, Tatiana B. Petrova, Dmitriy Shchitov, Pavel A. Sidyakin, Murat A. Murzabekov, Dmitriy N. Tsebro, Albert M. Marennyy, Nikolay A. Nefedov, Sakhayaan G. Gavriliev
Summary: The study revealed significant seasonal variations in radon levels in the fault zone at Mt. Beshtau and at the adits mouths, indicating a strong influence of air movement on radon release.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Rui Ding, Qiang Sun, Hailiang Jia, Shengze Xue, Qingmin Shi
Summary: The present study investigates the pore structure characteristics of coal samples from eleven coal mines in northern China and explores its relationship with the radon exhalation rate. It is found that low-rank coals have dominant micropores while medium and high-rank coals have dominant mesopores. The volume of mesopores and micropores in medium and high-rank coal samples is controlled by ash yield. The radon emission rate shows a positive linear correlation with the micropore volumes of the analyzed coal samples.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Filipa P. Domingos, Sergio L. R. Seco, Alcides J. S. C. Pereira
Summary: Terrestrial radionuclides in soil, bedrock, and building materials are considered the main sources of indoor radon (Rn-222) and thoron (Rn-220). This study focused on measuring the exhalation of Rn-222 and Rn-220 in granite samples and found differences in activity concentration and heterogeneities in Ra-226 and Ra-224. Rn-220 exhalation was found to be homogeneous among granite types, potentially exceeding Rn-222 exhalation in certain cases due to higher Ra-224 activity concentration.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Environmental Sciences
S. D. Kanse, B. K. Sahoo, J. J. Gaware, B. K. Sapra
Summary: Research on Rn-220 (thoron) has attracted increasing interest due to its radiological importance in indoor environments, with a new method developed in this study to estimate Rn-220 concentration based on indoor surface exhalation rate, addressing the challenge of accurately measuring its concentration due to its short half-life. The method has been validated in 25 dwellings in India and is suitable for large-scale field surveys due to its fast and easy applicability.
Article
Construction & Building Technology
Borja Frutos, Fernando Martin-Consuegra, Carmen Alonso, Gloria Perez, Joaquin Peon, Alberto Ruano-Ravina, Juan M. Barros, Ana M. Santorun
Summary: The presence of radon in buildings is a growing concern, especially in heritage buildings where high exhalation rates are found in thick elements. This study opens up a new pathway for remedies that should address all emissions, rather than viewing the soil as the sole or primary source of radon gas.
BUILDING AND ENVIRONMENT
(2021)
Article
Chemistry, Analytical
Supriya Rani, Sandeep Kansal, Amit Kumar Singla, Salik Nazir, Rohit Mehra
Summary: The measurements of radon/thoron exhalation rates from soil are useful for identifying high risk potential areas in terms of health effects. This study found lower radon exhalation rates and higher thoron exhalation rates in the study area.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Environmental Sciences
Xiaolu Liu, Xiangyang Li, Ming Lan, Yong Liu, Changshou Hong, Hong Wang
Summary: The study focused on the effects of dry density, particle size range, and moisture content of overburden soil on gas permeability and radon exhalation, leading to a theoretical model of radon exhalation and experimental setup design. Results showed that with changes in these factors, the permeability of overburden soil and radon exhalation rate were affected accordingly.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Analytical
Pooja Panwar, Mukesh Prasad, Abhishek Joshi, Krishna Pal Singh, Rohit Mehra, R. C. Ramola
Summary: The study aims to evaluate radon gas accumulation in the indoor environment of a test village in Tehri Garhwal, India. Radon gas accumulation was estimated based on radon exhalation rate, radium content in soil, and radon concentration in indoor air. The measured and estimated radon concentrations in the indoor environment varied from 31 ± 25 to 177 ± 56 Bq/m³ (mean = 69 Bq/m³) and from 48 to 272 Bq/m³ (mean = 108 Bq/m³), respectively. The findings of this study contribute to a better understanding of radon transport behavior and its accumulation in enclosed spaces.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Environmental Sciences
Shakuntala Rani, Rajender Singh Kundu, Vinod Kumar Garg, Balvinder Singh, Amanjeet Panghal, Neeraj Dilbaghi
Summary: This study measured the exhalation rates of radon and thoron from surface soil in rural sites of district Hisar, Haryana, India. The results showed that Rn-222 mass exhalation rates in soil samples varied significantly, indicating differences in geological features and topsoil characteristics. The findings also suggested that the usage of study area soil as building material is safe.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Multidisciplinary Sciences
Eka Djatnika Nugraha, Masahiro Hosoda, Kusdiana, Untara, June Mellawati, Nurokhim, Yuki Tamakuma, Abarrul Ikram, Mukh Syaifudin, Ryohei Yamada, Naofumi Akata, Michiya Sasaki, Masahide Furukawa, Shinji Yoshinaga, Masaru Yamaguchi, Tomisato Miura, Ikuo Kashiwakura, Shinji Tokonami
Summary: Mamuju is a unique High Natural Background Radiation Area with an average annual effective dose of 32 mSv. The lifetime cumulative dose calculation suggests that residents could receive as much as 2.2 Sv on average, much higher than atomic bomb survivors. The study results provide new scientific data for understanding health effects related to chronic low-dose-rate radiation exposure and can be used in future epidemiology studies.
SCIENTIFIC REPORTS
(2021)
Article
Construction & Building Technology
Talia Tene, Cristian Vacacela Gomez, Gabriela Tubon Usca, Betzabeth Suquillo, Stefano Bellucci
Summary: Exposure to 222-Radon (Rn) in closed environments from building materials, soil, or water, was investigated in Ecuador. The study measured radon exhalation rates of 40 building materials and found that granite samples had the highest exhalation rate while clay bricks were below the detection level. Effective dose rates in a reference dwelling were found to range from 0.019 to 0.112 mSv/y, with variation depending on exposure time and quantity of granite used.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Environmental
Krishna Pal Singh, Subhash Chandra, Pooja Panwar, Abhishek Joshi, Ganesh Prasad, G. S. Gusain, R. C. Ramola
Summary: The present study focused on measuring radon concentrations in soil gas at various depths, radon exhalation rate from soil samples, and gamma dose rate in Garhwal Himalaya, India. The results showed significant variations in radon concentrations and exhalation rates in the soil gas.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2023)
Article
Environmental Sciences
Khaled F. Al-Shboul
Summary: This research uses machine learning algorithms and multivariate analysis techniques to investigate the complex interplay between soil characteristics and radon surface exhalation rate. Several key factors influencing radon exhalation rate are identified, and contour plots are used to visualize the relationships between these variables. Additionally, cluster analysis and principal component analysis are employed to explore the intricate interactions of soil attributes on radon exhalation. The study highlights the effectiveness of XGBoost and LightGBM algorithms in quantifying the impacts of soil characteristics on radon exhalation rates, providing valuable insights for environmental policies and radon mitigation strategies.
ENVIRONMENTAL POLLUTION
(2023)
Article
Chemistry, Analytical
D. R. Rangaswamy, S. Suresh, E. Srinivasa, J. Sannappa
Summary: This study examines the Rn-222, Rn-220, and their progeny concentration in Shivamogga district using SSNTD's based pin hole dosimeters and deposition-based progeny sensor. The average indoor concentrations of Rn-222 and Rn-220 range from 8.14 to 146 Bq m(-3) and 13.01 to 157 Bq m(-3) respectively, with mean values of 60.61 and 61.77 Bq m(-3). The EEC for Rn-222 and Rn-220 range from 1.55 to 19 Bq m(-3) and 0.44 to 6 Bq m(-3) respectively, with mean values of 7.29 and 2.66 Bq m(-3). The annual average equilibrium factor for Rn-222 is within the global mean values of 0.4, while the thoron is slightly higher than the specified global mean value of 0.02. The annual effective dose ranges from 0.31 to 2.5 mSvy(-1), with a mean value of 1.1 mSvy(-1).
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Engineering, Environmental
Salik Nazir, Shakeel Simnani, B. K. Sahoo, Irfan Rashid, Sajad Masood
Summary: The research assessed radioactivity in groundwater of Srinagar City using uranium and radon as proxies. While uranium concentration was found to be below globally accepted levels, radon concentration exceeded the permissible limits set by the USEPA in 32% of groundwater samples. This information could be vital for health professionals in Kashmir studying lung cancer incidence, as radon is the second leading cause of lung cancer worldwide.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2021)
Article
Environmental Sciences
S. D. Kanse, B. K. Sahoo, J. J. Gaware, B. K. Sapra
Summary: Research on Rn-220 (thoron) has attracted increasing interest due to its radiological importance in indoor environments, with a new method developed in this study to estimate Rn-220 concentration based on indoor surface exhalation rate, addressing the challenge of accurately measuring its concentration due to its short half-life. The method has been validated in 25 dwellings in India and is suitable for large-scale field surveys due to its fast and easy applicability.
Article
Construction & Building Technology
Mukesh Kumar, Pankaj Kumar, Anshu Agrawal, B. K. Sahoo
Summary: Radon, thoron, and their progeny concentrations were measured in dwellings around a nuclear power plant using solid-state nuclear track detectors. The study found equilibrium factors of 0.44 for radon and 0.015 for thoron indoors, and an annual inhalation dose of 0.97 mSv for the public living around the plant.
INDOOR AND BUILT ENVIRONMENT
(2022)
Article
Chemistry, Analytical
Salik Nazir, B. K. Sahoo, Supriya Rani, Sajad Masood, Rosaline Mishra, Nissar Ahmad, Irfan Rashid, Sheikh Zahoor Ahmad, Shakeel Simnani
Summary: Radiation exposure is an inescapable part of our everyday life, primarily coming from terrestrial or cosmic sources, with humans receiving an average of 2.4 mSv y(-1) of natural background radiation. In this study, attempts were made to quantify groundwater radon-222 and indoor radon, thoron, and their progeny using both active and passive techniques.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Analytical
Tarun K. Agarwal, B. K. Sahoo, Mukesh Kumar, B. K. Sapra
Summary: In this study, a Computational Fluid Dynamics (CFD) code was used to simulate the behavior of aerosols and decay products indoors, and its reliability was confirmed by comparing simulated results with well-known cases reported in literature, showing a good agreement within +/- 3.5%.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Analytical
Supongtoshi Jamir, B. K. Sahoo, Rosaline Mishra, Parimal Chandra Bhomick, Dipak Sinha
Summary: The study found varying concentrations of indoor radon, thoron, and their progeny in Mokokchung district of Nagaland, India, with inhalation doses within recommended values. Equilibrium factors for indoor radon and thoron also showed variability within the measured range.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Chemistry, Analytical
Mukesh Kumar, Pankaj Kumar, Anshu Agrawal, B. K. Sahoo
Summary: The dissolved radon concentration in drinking water from hand pumps around the Harduaganj thermal power plant and Narora atomic power plant in India was measured using a continuous radon monitor. The results showed that all collected water samples had radon concentrations well below the limit set by the World Health Organization. The total annual effective dose due to radon inhalation and ingestion from water was also found to be well below the safe limit recommended by the European Commission and World Health Organization.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Chemistry, Analytical
T. Thuamthansanga, B. K. Sahoo, Ramesh Chandra Tiwari
Summary: The paper demonstrates a causal relationship between thoron anomaly and earthquakes along the Indo-Burman subduction line. The thoron anomaly at the monitoring station specifically responds to earthquakes along the subduction line, with an average precursory time of around 7 days.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Analytical
A. Pyngrope, A. Saxena, A. Khardewsaw, Y. Sharma, B. K. Sahoo
Summary: The variation of radon mass exhalation rate (J(m)) and thoron surface exhalation rate (J(s)) with soil's porosity and moisture content was studied using a scintillation based monitor-Smart RnDuo. Results showed that there was no convincing trend of variation with porosity, while with respect to moisture content, there was a sporadic increase observed in the values of J(m) and J(s) up to a certain level, beyond which a decreasing trend was observed.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Chemistry, Analytical
Mukesh Kumar, Pankaj Kumar, Rama Prajith, Anshu Agrawal, B. K. Sahoo
Summary: In this study, the radon and thoron exhalation rates, as well as the specific activities of certain isotopes, were measured in soil samples collected from the surrounding area of a power station. The aim was to investigate if there was any excess radioactivity in the soil due to the accumulation of fly ash. The study also aimed to demonstrate the applicability of a radon exhalation-based model in estimating indoor radon concentration. The results showed that the radon and thoron exhalation rates and activities were within normal ranges, indicating no significant excess radioactivity compared to the adjoining region.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Environmental Sciences
Mukesh Kumar, Pankaj Kumar, Anshu Agrawal, B. K. Sahoo
Summary: Radon concentration in household water collected from hand pumps in 25 villages surrounding the NTPC Dadri was measured using a continuous radon monitor. The measured radon concentration was within the limit set by WHO. The annual effective dose due to ingestion and inhalation of radon released from water was found to be higher than the reference dose level recommended by WHO and UNSCEAR.
JOURNAL OF WATER AND HEALTH
(2022)
Article
Engineering, Environmental
T. Thuamthansanga, B. K. Sahoo, Ramesh Chandra Tiwari
Summary: The study examined radon and thoron concentrations in soil and water at a notable fault in Mizoram state, India. The data from the isotopes were used to estimate the uranium and thorium content in the region. A locally developed and calibrated ZnS(Ag) alpha based scintillation counter was used to assess the radon and thoron data. It was found that the thoron concentration was higher than the radon concentration in both soil and water, and the uranium and thorium content were higher in water than in soil.
ENVIRONMENTAL ENGINEERING RESEARCH
(2023)
Article
Environmental Sciences
Supongtoshi Jamir, B. K. Sahoo, Rosaline Mishra, Dipak Sinha
Summary: Concentrations of indoor radon, thoron, and their progeny were detected in several homes in Dimapur district, Nagaland. The study found that different types of housing with varying ventilation levels contribute to the levels of indoor radon, thoron, and their progeny. The survey showed that the inhalation dose is within the reference value suggested by the International Commission on Radiological Protection (ICRP), 2018.
RADIATION PROTECTION DOSIMETRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Supongtoshi Jamir, B. K. Sahoo, Rosaline Mishra, Dipak Sinha
Summary: This study conducted an indoor radon and thoron survey in 50 dwellings in Kohima district, Nagaland, India. The concentrations of radon and thoron, as well as their progeny, showed a predictable pattern with higher levels in winter and lower levels in summer. Concrete housing had higher radon and thoron concentrations compared to bamboo and semi-wood/bamboo homes. The study also examined the equilibrium factor (E.F.) and inhalation dose from radon, thoron, and their progeny.
ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES
(2023)
Article
Engineering, Environmental
Supongtoshi Jamir, B. K. Sahoo, Rosaline Mishra, Dipak Sinha
Summary: This study analyzed the radon content in groundwater and its exhalation rates in soil at 19 selected locations in Mokokchung district, Nagaland, India. The results showed that the radon exhalation rates in soil varied but were generally low. The radon concentration in drinking water was below international standards, and the total effective dose range was also within recommended levels.
GROUNDWATER FOR SUSTAINABLE DEVELOPMENT
(2023)
