Measurement of natural radioactivity and evaluation of radiation hazards in coastal sediments of east coast of Tamilnadu using statistical approach

Sivakumar, S.; Chandrasekaran, A.; Ravisankar, R.; Ravikumar, S.M.; Jebakumar, J. Prince Prakash; Vijayagopal, P; Vijayalakshmi, I.; Jose, M.T.

doi:10.1016/j.jtusci.2014.03.004

Cited by 93 publications

(51 citation statements)

References 23 publications

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“…It is the sum of the weighted activities 226 Ra, 232 Th and 40 K based on the estimation that 10 Bq kg À1 of 226 Ra, 7 Bq kg À1 of 232 Th and 130 Bq kg À1 of 40 K produced the same gamma dose rate (SureshGandhi et al, 2014;Tripathi et al, 2013). In terms of the radiological health safety assessment, the maximum permissible limit of Ra eq 370 Bq kg À1 had been set for materials to be used as component of building construction (Berekta & Matthew, 1985;Sivakumar et al, 2014). The formula used for the calculation is given as:…”

Section: Radium Equivalent Activity (Ra Eq )mentioning

confidence: 99%

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: Radium Equivalent Activity (Ra Eq )mentioning

confidence: 99%

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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“…Various multivariate statistical techniques have been used on collected data set from sediment samples, to formulate classifications of environmental variables without losing much information and it is an efficient tool to display complicated relationship among many variables [1,14,39]. The data sets of 111 observations including activity concentrations of 232 U, 238 Th, and 40 K as well as their radiological parameters were processed for multivariate statistical analysis, such as Correlation Matric (CM), and Cluster Analysis (CA) [3,4,29,53,59] using statistical software "Statistical Programme for Social Science" SPSS 19.0.…”

Section: Discussionmentioning

confidence: 99%

“…As per the survey, 87% of the dose received by human beings is due to natural radiation sources [32]. The study on distribution of the natural radionuclides is quite helpful in understanding about dredging dispersal, accumulation rate, sediment logical composition, and also the relation between grain size and density of the sediments [24,36,52,53,67]. In addition to this, it plays a major role in the adsorption studies with mineralogical, geochemical, and physicochemical parameters [11,20].…”

Section: Introductionmentioning

confidence: 99%

Application of multivariate technique to evaluate spatial distribution of natural radionuclides along Tamil Nadu coastline, east coast of India

et al. 2019

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The study focuses on the spatial mapping of naturally occurring radionuclides along entire Tamil Nadu coast, which constitute nearly 30% of the east coast of India. In view of this, a total of 37 beach sediment samples are collected, and spectral measurement was carried out by High Purity Germanium detector. The average activity concentrations were found to be in the range of 34.33 ± 32.94 Bq kg −1 for 238 U, 51.55 ± 40.39 Bq kg −1 for 238 Th and 282.59 ± 84.45 Bq kg −1 for 40 K. The contour maps showed the spatial distributions of each radionuclide and were drawn using the kriging method. Box-whisker plot shows the variation of activity concentrations of radionuclides, which follows the order 40 K > 232 Th > 238 U in all the sediment samples. To understand the complex relationships among the radioactive variables and its environmental classifications, a multivariate statistical technique such as correlation matrices, and cluster analysis were applied to the radioactive data sets.

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“…The distribution of radionuclides measured in Arabian and Turkish coffees and the radiological hazards using SPSS, version16.0 for Windows (Sivakumar et al, 2014). Figures 6 and 7 shows the distribution of radionuclides ( 226 Ra,232 Th, 40 K, and 238 U) with respect to sample code numbers in the Arabian and Turkish coffee.…”

Section: Descriptive Statisticsmentioning

confidence: 99%

Radiological hazard of coffee to humans: a comparative study of Arabian and Turkish coffees

Alharbi¹,

Alamoudi²

2017

Afr. J. Agric. Res.

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Thirty-nine Arabian and Turkish coffee powder samples purchased from various markets in SaudiTh were found to be 2.57 to 10.63 Bq/kg and nondetectable to 8.01 Bq/kg for Arabian coffee and nondetectable to 10.09 Bq/kg and nondetectable to 9.75 Bq/kg for Turkish coffee, respectively. Based on these values, we estimated the potential radiological hazards to consumer health from coffee powder. We determined the radium equivalent, annual effective dose rate, and external and internal hazard for each element, and all were found to be below the limit recommended by the United Nations Scientific Committee on the Effects of Atomic Radiation. However, absorbed dose rate values for some samples were higher than the permissible limit. In all samples, the 137 Cs concentration was below the detection limit. The average annual committed effective dose values reported in this study were far below the world average value of 0.30 mSv/yr for an individual. In addition, the limit for the threshold consumption rate was calculated. The statistical methods were applied to study the relationship between all the calculated natural radionuclides and their hazard parameters. Results indicated that the use of these types of coffee had no significant radiological health risks. This study may contribute data on coffee powder for formulating regulations related to radiological health care.

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Measurement of natural radioactivity and evaluation of radiation hazards in coastal sediments of east coast of Tamilnadu using statistical approach

Cited by 93 publications

References 23 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

Application of multivariate technique to evaluate spatial distribution of natural radionuclides along Tamil Nadu coastline, east coast of India

Radiological hazard of coffee to humans: a comparative study of Arabian and Turkish coffees

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