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Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material

The present study aimed to assess the radiological hazards associated with applying the investigated granite in the building materials and the infrastructures applications. The investigated granites are classified into four categories: El-Urf, barren, colourful and opaque. El Urf monzogranite intrud...

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Autores principales: El Dabe, Mohamed M., Ismail, A. M., Metwaly, Mohamed, Taalab, Sherif A., Hanfi, Mohamed Y., Ene, Antoaneta
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8839051/
https://www.ncbi.nlm.nih.gov/pubmed/35161168
http://dx.doi.org/10.3390/ma15031224
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author El Dabe, Mohamed M.
Ismail, A. M.
Metwaly, Mohamed
Taalab, Sherif A.
Hanfi, Mohamed Y.
Ene, Antoaneta
author_facet El Dabe, Mohamed M.
Ismail, A. M.
Metwaly, Mohamed
Taalab, Sherif A.
Hanfi, Mohamed Y.
Ene, Antoaneta
author_sort El Dabe, Mohamed M.
collection PubMed
description The present study aimed to assess the radiological hazards associated with applying the investigated granite in the building materials and the infrastructures applications. The investigated granites are classified into four categories: El-Urf, barren, colourful and opaque. El Urf monzogranite intrudes metagabbro diorite complex with sharp contacts. Based on the activity concentrations, the environmental parameters such as absorbed dose rate (D(air)), annual effective dose (AED), radium equivalent activity (Ra(eq)), external (H(ex)) and internal (H(in)) hazard indices were measured. The mineralized pegmatite is located in the southwestern foothill of the Gabal El Urf younger granite. It displays well-defined zonation of three zones: outer, middle and inner zones represented by potash feldspar, quartz and mica, respectively. The isorad map showed that El Urf monzogranite is barren (Up to 100 cps) surrounding an excavation of the studied pegmatite that exhibits moderate colorful mineralization (phase-I = 500–1500 cps) and anomalous opaque mineralization (phase-II = 1500–3500 cps) pegmatites. The obtained results of radionuclides activity concentrations illustrated that the Opaque granites have the highest values of (238)U (561 ± 127 Bq kg(−1)), (232)Th (4289 ± 891 Bq kg(−1)) and (40)K (3002 ± 446 Bq kg(−1)) in the granites, which are higher than the recommended worldwide average. Many of the radiological hazard parameters were lesser than the international limits in the younger granites and barren pegmatites. All of these parameters were higher in the colorful and opaque mineralized pegmatites. The high activity and the elevated radiological hazard parameters in the mineralized pegmatites are revised to the presence of radioactive and radioelements bearing minerals, such as thorite, meta-autunite, kasolite, phurcalite, columbite, fergusonite, Xenotime and fluorapatite. Other instances of mineralization were also recorded as cassiterite, atacamite, galena, pyrite and iron oxide minerals. Thus, the granites with high radioactivity concentration cannot be applied in the different applications of building materials and ornamental stones.
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spelling pubmed-88390512022-02-13 Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material El Dabe, Mohamed M. Ismail, A. M. Metwaly, Mohamed Taalab, Sherif A. Hanfi, Mohamed Y. Ene, Antoaneta Materials (Basel) Article The present study aimed to assess the radiological hazards associated with applying the investigated granite in the building materials and the infrastructures applications. The investigated granites are classified into four categories: El-Urf, barren, colourful and opaque. El Urf monzogranite intrudes metagabbro diorite complex with sharp contacts. Based on the activity concentrations, the environmental parameters such as absorbed dose rate (D(air)), annual effective dose (AED), radium equivalent activity (Ra(eq)), external (H(ex)) and internal (H(in)) hazard indices were measured. The mineralized pegmatite is located in the southwestern foothill of the Gabal El Urf younger granite. It displays well-defined zonation of three zones: outer, middle and inner zones represented by potash feldspar, quartz and mica, respectively. The isorad map showed that El Urf monzogranite is barren (Up to 100 cps) surrounding an excavation of the studied pegmatite that exhibits moderate colorful mineralization (phase-I = 500–1500 cps) and anomalous opaque mineralization (phase-II = 1500–3500 cps) pegmatites. The obtained results of radionuclides activity concentrations illustrated that the Opaque granites have the highest values of (238)U (561 ± 127 Bq kg(−1)), (232)Th (4289 ± 891 Bq kg(−1)) and (40)K (3002 ± 446 Bq kg(−1)) in the granites, which are higher than the recommended worldwide average. Many of the radiological hazard parameters were lesser than the international limits in the younger granites and barren pegmatites. All of these parameters were higher in the colorful and opaque mineralized pegmatites. The high activity and the elevated radiological hazard parameters in the mineralized pegmatites are revised to the presence of radioactive and radioelements bearing minerals, such as thorite, meta-autunite, kasolite, phurcalite, columbite, fergusonite, Xenotime and fluorapatite. Other instances of mineralization were also recorded as cassiterite, atacamite, galena, pyrite and iron oxide minerals. Thus, the granites with high radioactivity concentration cannot be applied in the different applications of building materials and ornamental stones. MDPI 2022-02-06 /pmc/articles/PMC8839051/ /pubmed/35161168 http://dx.doi.org/10.3390/ma15031224 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
El Dabe, Mohamed M.
Ismail, A. M.
Metwaly, Mohamed
Taalab, Sherif A.
Hanfi, Mohamed Y.
Ene, Antoaneta
Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material
title Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material
title_full Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material
title_fullStr Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material
title_full_unstemmed Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material
title_short Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material
title_sort hazards of radioactive mineralization associated with pegmatites used as decorative and building material
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8839051/
https://www.ncbi.nlm.nih.gov/pubmed/35161168
http://dx.doi.org/10.3390/ma15031224
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