Radiological assessment of the Bayer process

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dc.contributor"European Union (EU)" and "Horizon 2020"
dc.contributor.authorGoronovski, Andrei
dc.contributor.authorVind, Johannes
dc.contributor.authorVassiliadou, Vicky
dc.contributor.authorPanias, Dimitrios
dc.contributor.authorTkaczyk, Alan Henry
dc.date.accessioned2019-12-24T19:03:12Z
dc.date.available2019-12-24T19:03:12Z
dc.date.issued2019-04-13
dc.description.abstractNaturally occurring radionuclides were studied through the Bayer process by calculating their mass flows. Aluminium of Greece (AoG) provided sample materials and plant data from several process stages. Measurements of radionuclide concentrations were carried out by gamma-ray spectroscopy. The performed measurements show that in the specific case of the AoG plant, the majority of the natural radionuclides were introduced with karst bauxites, which showed higher activity concentrations for nuclides compared to lateritic bauxites. Most of these nuclides accumulated in the bauxite residue, while only a minor portion of uranium isotope 238U was found in alumina, corresponding to 3% of its input value. Uranium was observed to partially dissolve in the process liquors similarly to 40K, whereas the latter was not associated with aluminium hydroxide. All the materials studied in the current research work had radionuclide concentrations well below the exemption limits set by EURATOM Basic Safety Standard, indicating that these naturally occurring radionuclides do not pose a radiological hazard for workers of the AoG plant or the public.et
dc.description.urihttps://doi.org/10.1016/j.mineng.2019.04.016et
dc.identifier.urihttp://hdl.handle.net/10062/66800
dc.language.isoenget
dc.publisherMinerals Engineeringet
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/636876///REDMUDet
dc.rightsinfo:eu-repo/semantics/embargoedAccesset
dc.subjectBayer processet
dc.subjectBauxite residueet
dc.subjectAluminium productionet
dc.subjectNORMet
dc.subjectUraniumet
dc.subjectThoriumet
dc.titleRadiological assessment of the Bayer processet
dc.typeinfo:eu-repo/semantics/articleet

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REDMUD - European Training Network for Zero-Waste Valorisation of Bauxite Residue (Red Mud)