Radon exhalation study of manganese clay residue and usability in brick production

Kovács, Tibor; Shahrokhi, Amin; Sas, Zoltán; Vígh, Tamás; Somlai, J.

doi:10.1016/j.jenvrad.2016.07.014

Cited by 36 publications

(14 citation statements)

References 15 publications

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“…The average of the emanation factor was 2.7 %. This variation of the emanation factor of certain materials can be explained by the different emanation coefficients, which depends on the characteristic of the material matrix (Hegedus et al, 2016;Kovacs et al, 2016;Sas et al, 2015b). The results generally match results that were reported in various publications (International Atomic Energy Agency, 2013).…”

Section: Radon Emanation and Massic Exhalation Features Of The Studiesupporting

confidence: 84%

Radiological characterisation of alkali-activated construction materials containing red mud, fly ash and ground granulated blast-furnace slag

Sas¹,

Sha

Soutsos

et al. 2019

Science of The Total Environment

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This study characterises the Naturally Occurring Radionuclides (NORs) content of a suite of secondary raw materials or industrial residues that are normally disposed of in landfills or lagoons but now are increasingly used in green concretes. This includes ashes from a variety of industrial processes and red mud from aluminium production, as well as air pollution control residue and cement kiln dust. The chemical composition of the samples was determined with X-ray fluorescence spectroscopy (XRF). The Ra-226, Th-232 and K-40 activity concentrations were obtained by gamma spectrometry, and the results were compared with recently published NOR databases. The correlation between the NOR content and the main chemical 2 composition was investigated. The radioactive equilibrium in the U-238 chain was studied based on the determination of progeny isotopes. The most commonly used calculation methods (activity concentration index and radium equivalent concentration) were applied to classify the samples. The radon exhalation rate of the samples was measured, and the radon emanation coefficient was calculated. Significant correlation was found between the NORs and certain chemical components. The massic exhalation demonstrated a broad range, and it was found that the emanation coefficients were significantly lower in the case of the residues generated as a result of high-temperature combustion processes. The results showed that a weak correlation between the Ra-226 concentration and the radon exhalation. This emphasizes that managing the Ra-226 content of recycled material by itself is not sufficient to control the radon exhalation of recycled materials used in building products. The investigated parameters and their correlation behaviour could be used to source apportion materials found during the process of landfill mining and recovery of material for recycling.

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Section: Radon Emanation and Massic Exhalation Features Of The Studiesupporting

confidence: 84%

Radiological characterisation of alkali-activated construction materials containing red mud, fly ash and ground granulated blast-furnace slag

Sas¹,

Sha

Soutsos

et al. 2019

Science of The Total Environment

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“…Consequently, the definition of the dose rates helps to make some preventive measures to be sure that the doses do not exceed the recommended limits. Moreover, the knowledge about gamma radiation is important in the construction industry to be capable to adopt preventative measures and decrease the unhealthy effects of the ionizing radiation (Kovács et al 2017a , b ; Ignjatović et al 2017 ; Lee et al 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Natural radioactivity and radiological risks of common building materials used in Semnan Province dwellings, Iran

Imani

Adelikhah

Shahrokhi

et al. 2021

Environ Sci Pollut Res

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Impact assessment of building materials is a focused topic in the field of radioecology. A radiological survey has conducted to monitor radioactivity of most common building materials in Semnan Province, Iran, and assess the radiation risk. Activity concentrations of 226Ra, 232Th, and 40K were measured in 29 samples including nine commonly used building materials that were collected from local suppliers and manufacturers, using a high purity germanium gamma-ray detector. The activity concentrations of 226Ra, 232Th, and 40K varied from 6.7±1 to 43.6±9, 5.9±1 to 60±11, and 28.5±3 to 1085±113 Bq kg−1 with averages of 26.8±5, 22.7±4, and 322.4±4 Bq kg−1, respectively. By applying multivariate statistical approach (Pearson correlation, cluster, and principal component analyses (PCA)), the radiological health hazard parameters were analyzed to obtain similarities and correlations between the various samples. The Pearson correlation showed that the 226Ra distribution in the samples is controlled by changing the 232Th concentration. The variance of 95.58% obtained from PCA resulted that the main radiological health hazard parameters exist due to the concentration of 226Ra and 232Th. The resulting dendrogram of cluster analysis also shows a well coincidence with the correlation analysis.

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“…The calibrations were conducted using the same method explained in our previous publication [19][20][21].…”

Section: Radiation Dose Calculationsmentioning

confidence: 99%

A brief radiological survey and associated occupational exposure to radiation in an open pit slate mine in Kashan, Iran

Shahrokhi

Adelikhah

Imani

et al. 2021

J Radioanal Nucl Chem

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A comprehensive radiological survey was carried out in an open-cut slate stone quarry. The activity of 226Ra, 228Ra and 40 K in the ore samples were measured as 38 ± 5, 41 ± 6 and 869 ± 52 Bq kg1, respectively. Outdoor radon and indoor radon concentrations were measured from 37 ± 7 to 193 ± 11 Bq m−3 (77 ± 8 Bq m−3), and 49 ± 6 to 253 ± 23 Bq m−3 (131 ± 13 Bq m−3), respectively. The average indoor and outdoor gamma dose were measured as 116 and 84 nSv h− 1, respectively. The annual effective doses were estimated between 1.0 ± 0.1 and 3.3 ± 0.3 mSv year−1. The annual lung cancer risks were calculated in the range of 3.3 × 10−2 to 13.12 × 10−2 % (7.72 × 10−2%).

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Radon exhalation study of manganese clay residue and usability in brick production

Cited by 36 publications

References 15 publications

Radiological characterisation of alkali-activated construction materials containing red mud, fly ash and ground granulated blast-furnace slag

Radiological characterisation of alkali-activated construction materials containing red mud, fly ash and ground granulated blast-furnace slag

Natural radioactivity and radiological risks of common building materials used in Semnan Province dwellings, Iran

A brief radiological survey and associated occupational exposure to radiation in an open pit slate mine in Kashan, Iran

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