Radiological characterization of clay mixed red mud in particular as regards its leaching features

Hegedűs, Miklós; Sas, Zoltán; Tóth-Bodrogi, Edit; Szántó, Tamás; Somlai, J.; Kovács, Tibor

doi:10.1016/j.jenvrad.2016.05.002

Cited by 25 publications

(2 citation statements)

References 20 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: 85%

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: 85%

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

View full text Add to dashboard Cite

show abstract

“…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 those reported in various publications (International Atomic Energy Agency, 2013).…”

supporting

confidence: 85%

Radiological evaluation of industrial residues for construction purposes correlated with their chemical properties

Sas

Vandevenne

Doherty

et al. 2019

Science of The Total Environment

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This study characterises the naturally occurring radionuclide (NOR) contents 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 contents 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 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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Correlation between radon release, radioactivity and mineralogy: a case study of Estonian black sands

Tkaczyk

Koch

Ipbüker

et al. 2020

J Radioanal Nucl Chem

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Radiological characterization of clay mixed red mud in particular as regards its leaching features

Abstract: The reuse of industrial by-products such as red mud is of great importance. In the case

Cited by 25 publications

References 20 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

Radiological evaluation of industrial residues for construction purposes correlated with their chemical properties

Correlation between radon release, radioactivity and mineralogy: a case study of Estonian black sands

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