Spatio-temporal variability of natural radioactivity as tracer of beach sedimentary dynamics

Arriola-Velásquez, A.C.; Tejera, A.; Guerra, Jonay González; Bilbao, Ignacio Alonso; Aguilera, Héctor; Arnedo, M.A.; Rubiano, J.G.; Martel, P.

doi:10.1016/j.ecss.2019.106476

Cited by 11 publications

(9 citation statements)

References 41 publications

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“…After this, samples were taken to the laboratory, they were dried at 80 •C for 24 h. They were then sieved through a 1 mm mesh size to homogenise them and kept inside PVC-trunk conical containers, filled to 40 cm 3 . They were sealed with aluminium strips, because they are impermeable to radon gas [4]. Finally, the samples were stored for a duration of approximately one month before measurement to allow secular equilibrium between 226 Ra and 222 Rn and its short-lived progenies (as 214 Pb is used for determining 226 Ra).…”

Section: Methodsmentioning

confidence: 99%

“…A cluster analysis (CA) [13] and a principal component analysis (PCA) [16] were carried out in order to evaluate the spatial distribution of the activity concentrations of the radionuclides studied [4]. For the temporal analysis a one-way ANOVA test was performed to evaluate the presence of significant difference among the difference groups.…”

Section: Methodsmentioning

confidence: 99%

“…Regarding the sand composition of Las Canteras beach, different sources can be identified: basic volcanic rocks from La Isleta, in the northeast of El Confital bay, phonolitic lava flow from the southwestern side of the bay, basic rocks and magnetite from the mouth of La Ballena ravine in the south part of the beach, submerged sandbars located between the bathymetric curve of 50 m and the beachfront and the natural offshore calcarenite rocky bar Figure 1 -Location of the study region and the sampling points in Las Canteras beach. Coordinates are in the UTM system [4]. [6], [14].…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the results obtained could be expected to be applied in other parts of the world. In this framework, a spatio-temporal analysis of the activity concentrations of natural radionuclides was performed in Las Canteras beach during 2016 and 2019 [4], [5] and it is described in this work. These studies evaluated the role of gamma emitting radionuclides 226 Ra, 228 Ra, 40 K, 210 Pbex and the ratio 226 Ra/ 228 Ra as tracers of erosion and accumulation periods in beach areas.…”

Section: Introductionmentioning

confidence: 99%

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Beach sediment dynamics from natural radionuclides point of view

Arriola-Velásquez

Cruz

Vega

et al. 2022

Ninth International Symposium “Monitoring of Mediterranean Coastal Areas: Problems and Measurement Techniques”

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This work assesses the use of natural radionuclides as tracers of marine sediment dynamic in a heterogeneous beach in Spain. Multivariant statistics was used to evaluate the spatial variability of the activity concentration of natural radionuclides. The statistics applied for the temporal variability showed that some erosion agents influence the activity concentration found for various natural radionuclides during erosion and accumulation periods. The results of the different analysis suggested that the radionuclides studied could be used as tracers of marine sediment dynamic in beaches.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Beach sediment dynamics from natural radionuclides point of view

Arriola-Velásquez

Cruz

Vega

et al. 2022

Ninth International Symposium “Monitoring of Mediterranean Coastal Areas: Problems and Measurement Techniques”

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“…Several studies have been conducted to determine the magnitude concentration of the radionuclides in beach sand, such as in Thailand (10), in the Canary Islands (11), in India (12), and Las Canteras, Spain (13). The total radiation dose has received by humans does not only come from natural radionuclides such as the combination of 40 K, 232 Th, and 226 Ra.…”

Section: Introductionmentioning

confidence: 99%

The Natural Radionuclide Activity and the Risk of Potential Radiation in Health Effect: A Study on Beach Sand in Madura, Bali, and Lombok

Priasetyono

Makmur

Prihatiningsih

et al. 2021

JKL

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Introduction: Beach sand is one of the widely used aggregates in construction, especially in coastal areas. However, beach sand contains a hidden risk, namely radioactive hazards. This research will analyze the radioactive activity of nuclides 226Ra, 232Th, and 40K on beach sand and calculate the health risk potential in radiation exposure to the household. Methods: Beach sands sampling was carried out on Madura Island, Bali, and Lombok in 2016. All samples were ovensifted and then put into Marinelli to be chopped using high-purity germanium (HPGe) gamma-ray detectors for three days. Results and Discussion: The average of 226Ra, 232Th, and 40K radionuclide activity on the beach sand in Madura were respectively 31.46 Bq/kg, 40.12 Bq/kg, and 334.04 Bq/ kg; in Bali were 25.10 Bq/kg, 7.71 Bq/kg, and 165.15. Bq/kg; and in Lombok the amount is 25.88 Bq/kg, 8.25 Bq/kg and 171.99 Bq/kg. The calculation of the radium equivalent (Raeq) value on beach sand in Madura, Bali, and Lombok has the highest value of 132.72 Bq/kg, 54.06 Bq/kg, and 55.92 Bq/kg. The gamma index (I) in Madura, Bali, and Lombok was 1.02; 0.39; and 0.40. For the calculation of Hex and Hin in Madura, Bali, and Lombok, the highest were 0.38; 0.15; 0.15; and 0.48; 0.23; 0.24. Conclusion: The activity of the three types of natural radionuclides from the three regions is still below the threshold value. Analysis of potential health risks showed in the gamma index value (I) indicator, which exceeds the safe threshold in the Madura beach sand sample.

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