Studies on the dependence of natural radioactivity on clay minerals of soils in Davanagere district of Karnataka, India

Kavasara, Malleshi; Vinutha, P R; Kaliprasad, C. S.; Narayana, Y.

doi:10.1007/s10967-021-07920-8

Cited by 12 publications

(4 citation statements)

References 27 publications

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“…Likewise, 232 Th (19.39 Bq kg −1 ) is higher than those from China [46] and Iraq [14]. On the other side, 40 K (277.16 Bq kg −1 ) is higher than those from Brazil [21], India [36], Jordan [49], Nigeria [10], and Saudi Arabia [34].…”

Section: Activity Concentrationsmentioning

confidence: 89%

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Distributions and Risk Assessment of the Natural Radionuclides in the Soil of Shoubra El Kheima, South Nile Delta, Egypt

et al. 2022

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Due to heightening concern about radiation hazards protection, activity concentrations of 226Ra, 232Th, 40K in forty soil samples collected from Shoubra El Kheima in the South Nile Delta were measured using gamma-ray spectrometry. The mean activity concentrations of 226Ra and 40K were higher in 20% of the considered samples than the world average values. A comprehensive comparison with up-to-date data was carried out. Spatial distribution maps of the measured radionuclides and radiological parameters were generated. The distributions of natural radionuclides were influenced by the soil organic matter, clay content, and scavenger metals oxides, as well as differences in the physical and chemical attributes and solubility of these radionuclides. The results revealed that industrial activity and agricultural practices in the study area caused an incremental increase in 226Ra and 40K activity concentrations. It can be deduced that although there are intensive industrial activities in this area, the natural radiation that comes from the soil is normal and does not pose a significant radiological hazard to the public. The natural radioactivity of soil in this area needs to be monitored periodically to prevent unnecessary radiation exposure to inhabitants.

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Section: Activity Concentrationsmentioning

confidence: 89%

“…Energy calibration of the detector was performed using standard point sources ( 137 Cs and 60 Co). Each sample was counted for 1000 s. Further details for precisely calculating activity concentration can be obtained elsewhere [9,[34][35][36].…”

Section: Sample Treatment and Analysismentioning

confidence: 99%

Distributions and Risk Assessment of the Natural Radionuclides in the Soil of Shoubra El Kheima, South Nile Delta, Egypt

et al. 2022

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“…The primordial radionuclides (naturally occurring radioactive materials, NORM) such as 226 Ra, 232 Th, and 40 K have spanned throughout the earth's crust, rocks, and soils at various concentrations during the nucleosynthesis process, which have half-lives of more than 10 9 years, equivalent to the earth's half-life (1)(2)(3) . The offspring radionuclides in 238 U series are disregarded as 226 Ra and its offsprings provide approximately 98.5 % of the external gamma radiation (4,5) . These natural radionuclides cause alpha, beta, and gamma-ray exposure to every living creature on earth.…”

Section: Introductionmentioning

confidence: 99%

Gamma Ray Spectroscopy Analysis of Sediments of Coastal Areas in Ennore, Tamil Nadu

Rajendiran,

Karthikayini,

Veeramuthu

et al. 2024

IJST

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Objectives: This research focuses on the determination of the natural radionuclides radium, thorium, and potassium in the twenty-six sediment samples collected at the sea, beach, and creek regions of Ennore Port. Methods: The activity concentrations of 226Ra, 232Th, and 40K were determined using gamma ray spectrometry with a high-purity germanium (HPGe) detector. Findings: The average activity concentrations of 226Ra, 232Th, and 40K were in the descending order of 40K (397.58 Bq kg-1) > 232Th (65.83 Bq kg-1) > 226Ra (18.28 Bq kg-1). The estimated average values of radiological parameters such as radium equivalent activity (143.04 Bq kg-1), absorbed dose rate (64.91 nGy h-1), annual effective dose equivalent (0.32 mSv y-1), and external hazard index (0.39) were lower than the respective world average values, reported by United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR, 2000). Moreover, the representative level index and annual gonadal dose equivalent were slightly higher than the world average value. Hence, this research proved that the study area is radiologically safe for humans and the environment. Novelty: A location and sample collection-based novelty is approached to carried out the work. Sea sediments were also collected along with samples from creek and beach regions in order to examine the dispersion of natural radionuclides from land to marine environments. The samples from the beach and creek regions were collected using a Peterson grab sampler. Especially in the sea region, the samples were collected using a Van Veen grab sampler at a depth of 4 m and a distance of 10 m parallel to the shoreline. Keywords: Natural radioactivity, Sediment, Ennore, Gamma ray spectrometry, HPGe detector, Radiological parameters

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“…In addition, soil is a raw resource for construction and agricultural endeavours. Bricks are the primary construction material in India, which contains 80% of soil with natural radionuclides [9][10][11]. On the other side, local brick makers are continuously extracting the soil for brick production and distributing it for building construction to various places of Tamil Nadu.…”

Section: Introductionmentioning

confidence: 99%

Mineralogical characterization and environmental radiation health assessment in brick samples of Tamil Nadu

Karthikayini

Chandrasekaran

2023

Preprint

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Natural radioactivity due to 238U, 232Th, and 40K in brick samples from Tamil Nadu was determined using gamma-ray spectrometry. The calculated mean activity concentrations of 238U, 232Th, and 40K, 69 ± 6, 62 ± 6, and 462 ± 23 Bq kg− 1, are higher than the world recommended limits of 35, 45, and 420 Bq kg− 1, respectively, and they are compared with the other countries. The calculated radiological parameters radium equivalent activity (193 ± 17 Bq kg− 1), internal hazard index (0.71 ± 0.06), activity utilization index (1.43 ± 0.13) were lower, while absorbed dose rate (89 ± 8 nGy h− 1), annual effective dose equivalent (0.43 ± 0.04 mSv y− 1) and excess lifetime cancer risk (1.52 ± 0.13 mSv y− 1), which are slightly higher than the world’s recommended limits. The minerals presented in the soil samples were identified using FT-IR and XRD techniques. Both techniques revealed that the presence of quartz, orthoclase, kaolinite, microcline, albite, illite, calcite, montmorillonite and organic carbon in the samples. Bi-variate statistical analysis was estimated to corroborate the relationship between radionuclides and radiological hazards.

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Studies on the dependence of natural radioactivity on clay minerals of soils in Davanagere district of Karnataka, India

Cited by 12 publications

References 27 publications

Distributions and Risk Assessment of the Natural Radionuclides in the Soil of Shoubra El Kheima, South Nile Delta, Egypt

Distributions and Risk Assessment of the Natural Radionuclides in the Soil of Shoubra El Kheima, South Nile Delta, Egypt

Gamma Ray Spectroscopy Analysis of Sediments of Coastal Areas in Ennore, Tamil Nadu

Mineralogical characterization and environmental radiation health assessment in brick samples of Tamil Nadu

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