Characteristics, spatial distribution and vertical profile of gamma-ray emitting radionuclides in the coastal environment of North Sinai

Seddeek, M. K.; Badran, H. M.; Sharshar, T.; Elnimr, Tarek

doi:10.1016/j.jenvrad.2005.03.005

Cited by 59 publications

(31 citation statements)

References 47 publications

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“…This frequently leads to a relatively constant 226 Ra/ 228 Ra ratio in many natural systems. The ratio value may vary, however, if the sample is subjected to physicalchemical processes that affect one disintegration series more than the other (Navas et al 2002;Seddeek et al 2005;Reza Abdi et al 2008).…”

Section: Results Of the Measurementsmentioning

confidence: 99%

Levels of 131I and Six Natural Radionuclides in Sludge from the Sewage Treatment Plant of Valladolid, Spain

Jiménez

Debán

Pardo

et al. 2010

Water Air Soil Pollut

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The levels of 131 I and six natural radionuclides ( 238 U, 226 Ra, 210 Pb, 228 Ra, 224 Ra, and 40 K) were determined in sewage sludge samples obtained from an urban wastewater treatment plant that services a medium-sized town in Spain. Secondary treatment of wastewater consisting of anaerobic, anoxic, and oxic stages is collectively called A2O processing. Radio analytical determinations were performed by gamma spectrometry using a highpurity germanium detector. This technique has proven useful in identifying local radioactive pollution. This type of pollution was consistently detected throughout the year, with several increases associated with authorized discharges from hospitals. Finally, we examined the radiation dose that workers are exposed to due to the presence of 131 I in the sludge. We found inhalation risk to be negligible, with external radiation as the main source of exposure to 131 I.

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Section: Results Of the Measurementsmentioning

confidence: 99%

Levels of 131I and Six Natural Radionuclides in Sludge from the Sewage Treatment Plant of Valladolid, Spain

Jiménez

Debán

Pardo

et al. 2010

Water Air Soil Pollut

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“…42 filter paper [25,26]. The samples were acidified until pH \2 to prevent precipitation or adsorption to the sample container walls [27,28].…”

Section: Measurement Of Gross Alpha and Gross Beta In Watermentioning

confidence: 99%

Natural environmental radioactivity and the corresponding health risk in Johor Bahru District, Johor, Malaysia

Saleh

Ramli

Hamzah

et al. 2014

J Radioanal Nucl Chem

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This study aims to obtain the baseline data on environmental terrestrial radiation and to assess the corresponding health risk in Johor Bahru District, Johor, Malaysia. The mean activity concentrations of 232 Th, 226 Ra and 40 K were 119 ± 6, 51 ± 4 and 158 ± 21 Bq kg -1 , respectively. Primordial radionuclide 232 Th is the main contributor to gamma dose rate and the mean found to be 135 nGy h -1 . Gross alpha and gross beta activity concentrations in water were 0.012 ± 0.003 and 0.234 ± 0.018 Bq L -1 , respectively.

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“…The calculated minimum detectable activities using this experimental setup were 0.2, 0.1, and 0.4 Bq kg −1 for 226 Ra, 232 Th, and 40 K, respectively. Reference materials (IAEA reference materials Soil 6, 326 and 327 and uranium ore GU-1) were used for checking the calibration of the system and for routine monitoring of the performance of the spectrometer [22] and checking the tightness of the containers [7]. For quality control, the measurements were cross-checked for some samples using a 50 % p-type closed-end coaxial HPGe detector (Canberra) with an energy resolution (FWHM) of 1.89 keV for the 1332.5 keV 60 Co γ -line.…”

Section: Methodsmentioning

confidence: 99%

“…All minerals and raw materials contain NORM, of which the most important are the radionuclides in the 238 U and 232 Th decay series and 40 K. The natural addition of heavy mineral sands deposits with their higher contents of radionuclides from 238 U-series and/or 232 Th-series at discrete positions along the shore can raise the background radiation level to few times the safe level. Such areas were found throughout the world; in the North Sea [4,5],Greece [6], Egypt [7], South Africa [8], Iran [9], India [10][11][12], Sri Lanka [13], China [14], Brazil [15,16], and in other counties [17].…”

Section: Introductionmentioning

confidence: 99%

Multivariate Statistical Analysis of High Background Radiation Area on the Hadhramout Coast

2015

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This work focuses on the radiometric characteristics of beach sand along the Hadhramout coast, Gulf of Aden, Yemen. Beach sands samples were collected from 27 locations. The activity concentrations of the terrestrial radionuclides 226 Ra, 232 Th, and 40 K were determined. The results obtained provide pioneering data on the radioactivity levels in the coastal areas of Hadhramout. The radioactivity concentration of 232 Th was found to be a major contributor to the enhanced level of radiation in some beaches. The radiological data were processed using one-way analysis of variance to find out the differences between the elevated and non-elevated 232 Th groups of locations and multivariate statistical analysis, i.e., principal component analysis, discriminant analysis, and clustering analysis, to find similarities and correlation between the various samples and to discriminate between the two groups of locations. From the radiation hazard point of view, the outdoor annual effective dose for the region varied from 5.1 to 155.5 mSv with a mean value of 34.9 ± 31.9 mSv. The highest radiation level was found in Al-Jraf beach, where the highest absorbed dose rate of 126.8 nGy h −1 was recorded and the radiation hazard index exceeded twice the recommended limit of unity.

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Characteristics, spatial distribution and vertical profile of gamma-ray emitting radionuclides in the coastal environment of North Sinai

Cited by 59 publications

References 47 publications

Levels of 131I and Six Natural Radionuclides in Sludge from the Sewage Treatment Plant of Valladolid, Spain

Levels of 131I and Six Natural Radionuclides in Sludge from the Sewage Treatment Plant of Valladolid, Spain

Natural environmental radioactivity and the corresponding health risk in Johor Bahru District, Johor, Malaysia

Multivariate Statistical Analysis of High Background Radiation Area on the Hadhramout Coast

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