A relationship between the natural radioactivity and mineralogical composition of the Ponnaiyar river sediments, India

Suresh, G.; Ramasamy, V.; Meenakshisundaram, V.; Venkatachalapathy, R.; Ponnusamy, V.

doi:10.1016/j.jenvrad.2011.02.003

Cited by 66 publications

(14 citation statements)

References 16 publications

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“…Th ranged from BDL-140.19 Bq kg À1 with a mean of 55.37 ± 32.74 Bq kg À1 and 40 K ranged from 188.73 to 2401 Bq kg À1 with a mean value of 1023 ± 474 Bq kg À1 . According to the results obtained in this study, mean activity concentrations of the radionuclides increase according to the order 226 Ra < 232 Th < 40 K. Concentration of 232 Th is found to be higher than 226 Ra concentration in the sediment due to the low geochemical mobility and insoluble nature of thorium in water (Suresh, Ramasamy, Meenakshisundaram, Venkatachalapathy, & Ponnusamy, 2011). Profiles of the activity concentration of the measured radionuclides with reference to the sample numbers are presented in Fig.…”

Section: Sample Preparation and Measurementsmentioning

confidence: 52%

Natural radioactivity measurements and evaluation of radiological hazards in sediment of Oguta Lake, South East Nigeria

Isinkaye

Emelue

2015

Journal of Radiation Research and Applied Sciences

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SedimentOguta Lake Excess lifetime cancer risk a b s t r a c tThe distributions of naturally occurring radionuclides 226 Ra, 232 Th and 40 K in sediments of Oguta Lake, Nigeria were determined using gamma ray spectrometry in order to assess the radiological health hazards and excess lifetime cancer risks associated with the use of the sediments. The mean activity concentrations of 226 Ra, 232 Th and 40 K were found to be 47.89 ± 18.67 Bq kg À1 , 55.37 ± 32.74 Bq kg À1 and 1023 ± 474 Bq kg À1 , respectively. The results of the radiological indices and dose rates obtained in this study were all higher than their worldwide mean values but lower than their maximum recommended limits indicating that the use of the sediments as building materials do not constitute any excessive radiological hazards. The area is known to be subjected to environmental degradations due to oil exploration. Therefore, the results of this study could serve as an important radiometric baseline data upon which future epidemiological studies and environmental monitoring initiatives could be based.

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Section: Sample Preparation and Measurementsmentioning

confidence: 52%

Natural radioactivity measurements and evaluation of radiological hazards in sediment of Oguta Lake, South East Nigeria

Isinkaye

Emelue

2015

Journal of Radiation Research and Applied Sciences

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“…Suresh et al (2011) found that  is positively correlated with the concentration of 232 Th (R = 0.603), and the concentration of 40 K (R = 0.483), yet negatively correlated with the concentration of 238 U.…”

Section: 2 S P a T I A L D I S T R I B U T I O Nmentioning

confidence: 98%

“…Recently, in river sediments from southeastern India, Ramasamy et al (2014) reported in Vaigai River significant positive correlations between mass-specific magnetic susceptibility  and the concentration of 232 Th and 238 U. In addition, in Ponnaiyar River, Suresh et al (2011) also reported that  and the content of clay minerals are positively correlated with the concentration of 232 Th and 40 K, but negatively correlated with the concentration of 238 U. They found that the activity concentration depends upon the content of clay minerals (kaolinite).…”

Section: Introductionmentioning

confidence: 98%

Magnetic, chemical and radionuclide studies of river sediments and their variation with different physiographic regions of Bharathapuzha river, southwestern India

et al. 2015

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“…On the other hand, the soil works as a medium for migration for transfer radionuclides to the biological system, and therefore, it is the primary indicator of radioactive contamination in the environment. Natural radionuclides in river sediments generate important elements of background radiation exposure of the population (Suresh, Ramasamy, Meenakshisundaram, Venkatachalapathy, & Ponnusamy, 2011b). Therefore, the knowledge of the concentrations and distribution of radionuclides in the samples deposited is of great importance because it provides useful information on environmental pollution and its effects on human health are associated with the monitoring of natural radioactivity.…”

Section: Introductionmentioning

confidence: 99%

Measurements of natural radioactivity level in black sand and sediment samples of the Temsah Lake beach in Suez Canal region in Egypt

Fares

2017

Journal of Radiation Research and Applied Sciences

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The level of natural radioactivity in 20 black sand and 20 sediment samples collected from Temsah Lake beaches of Suez Canal district, Egypt was investigated. The gamma-ray spectrometry system with hyperpure germanium (HPGe) detector has been used to determined radioactivity concentrations. Mathematical model is used to estimate the activity concentrations of 222 Rn in the air with the activities of 226 Ra. The activity concentrations of the sediment and black sand samples range from 4.29 ± 1.66 to 30.06 ± 8.80 and 4.29 ± 0.68 to 18.52 ± 5.22 Bq/kg) for 226 Ra. The ranges of radioactivity concentration of 232 Th vary from 6.69 ± 1.54 to 39.24 ± 9.80 and 4.56 ± 1.07 to 18.65 ± 5.27 Bq/kg. The effective annual dose rate in the samples under study varies from 0.01 to 0.05 mSv/y for sediment samples and from 0.01 to 0.05 mSv/y for black sand samples. The concentrations of radon gas in the air were determined as well as the activity concentrations of 226 Ra. Radon 222 Rn doses from gas inhalation for humans were estimated to be in the range of 0.13e13.09 msv/y for all samples. The activity concentrations of all samples, which were measured in the present work, were compared with the values in other countries in the world, and it was found they were within the permissible limits, which indicates that the study area was radiologically safe for humans.

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A relationship between the natural radioactivity and mineralogical composition of the Ponnaiyar river sediments, India

Cited by 66 publications

References 16 publications

Natural radioactivity measurements and evaluation of radiological hazards in sediment of Oguta Lake, South East Nigeria

Natural radioactivity measurements and evaluation of radiological hazards in sediment of Oguta Lake, South East Nigeria

Magnetic, chemical and radionuclide studies of river sediments and their variation with different physiographic regions of Bharathapuzha river, southwestern India

Measurements of natural radioactivity level in black sand and sediment samples of the Temsah Lake beach in Suez Canal region in Egypt

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