Radiometric Assay of Hazard Indices in Egyptian Phosphate Profile and Phosphoric Acid Due to Natural Radioactivity


Authors : Dr. Ahmed A. Bekair; Dr. Ashraf A. El-Shennawy

Volume/Issue : Volume 7 - 2022, Issue 10 - October

Google Scholar : https://bit.ly/3IIfn9N

Scribd : https://bit.ly/3ExjcQs

DOI : https://doi.org/10.5281/zenodo.7184142

Abstract : -Radionuclide concentrations in phosphate sediments have always been higher than normal. Using a gamma ray spectrometer's Multi-Channel Analyzer (MCA), radionuclides from phosphate ore are redistributed throughout the environment through the production and enrichment of phosphogypsum and phosphatic acid. Dose evaluation and radiological effects were measured in each of the Nile Valley's sedimentary phosphate ores, domestic phosphoric acid, and insoluble calcium sulfate wastes precipitated during the primary raw materials for the production of phosphatic fertilizers have always been phosphate sediments and phosphatic acid. For Nile Valley low grade phosphate sediment, phosphoric acid, and insoluble calcium, natural radionuclides from the thorium and uranium series, radium equivalent activity (Raeq), external and internal hazards index (Hex&Hin), radioactivity level index (Gamma index) (I), alpha index (I), gamma-absorbed dose rate (DEx), exposure rate (ER), and annual effective dose equivalent (AEDE) were all calculated. East Sebaiya phosphate sediments are suitable for agricultural phosphatic fertilizers due to their high hazards indices. The total annual effective dose equivalent (AEDE) was the only exception, registering 2.96 mSvy-1 indoors and 0.74 mSvy-1 outdoors. The exposure rate (ER) was found to be higher than the world's permissible standard because of the waste's extremely high specific activity for the naturally occurring 226Ra radionuclide. This necessitated specific radiological risk management measures. Keywords:-Phosphate sediment; phosphoric acid; Radionuclides; Radiological effects; Thorium; Uranium; gamma ray spectroscopy; radiation hazard indices; Radioactivity; agriculture fertilizer.

-Radionuclide concentrations in phosphate sediments have always been higher than normal. Using a gamma ray spectrometer's Multi-Channel Analyzer (MCA), radionuclides from phosphate ore are redistributed throughout the environment through the production and enrichment of phosphogypsum and phosphatic acid. Dose evaluation and radiological effects were measured in each of the Nile Valley's sedimentary phosphate ores, domestic phosphoric acid, and insoluble calcium sulfate wastes precipitated during the primary raw materials for the production of phosphatic fertilizers have always been phosphate sediments and phosphatic acid. For Nile Valley low grade phosphate sediment, phosphoric acid, and insoluble calcium, natural radionuclides from the thorium and uranium series, radium equivalent activity (Raeq), external and internal hazards index (Hex&Hin), radioactivity level index (Gamma index) (I), alpha index (I), gamma-absorbed dose rate (DEx), exposure rate (ER), and annual effective dose equivalent (AEDE) were all calculated. East Sebaiya phosphate sediments are suitable for agricultural phosphatic fertilizers due to their high hazards indices. The total annual effective dose equivalent (AEDE) was the only exception, registering 2.96 mSvy-1 indoors and 0.74 mSvy-1 outdoors. The exposure rate (ER) was found to be higher than the world's permissible standard because of the waste's extremely high specific activity for the naturally occurring 226Ra radionuclide. This necessitated specific radiological risk management measures. Keywords:-Phosphate sediment; phosphoric acid; Radionuclides; Radiological effects; Thorium; Uranium; gamma ray spectroscopy; radiation hazard indices; Radioactivity; agriculture fertilizer.

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