Examination of the parameters affecting of < sup > 222 < /sup > Rn emanation for some industrial and environmental samples using gamma-spectroscopy

Appl Radiat Isot. 2022 May 6;186:110272. doi: 10.1016/j.apradiso.2022.110272. Online ahead of print.ABSTRACTThe present work aims to radiologically characterize five samples (monazite, zircon, scale waste originating from petroleum production, black sands and phosphate rocks) from different industrial applications and environments in the Egyptian territory. The first section of the present work discusses the measurement and analysis of 226Ra, 232Th and 40K concentrations. Moreover, the assessment of the hazard indices is given in terms of radium equivalent (Raeq), external hazard index (Hex), internal hazard index (Hin), gamma-activity index (Iγ) and alpha-activity index (Iα). The second section deliberates the 222Rn gas emanated from the samples and studies the physical parameters affecting the emanation process. The results found that the monazite sample has the highest concentration of 226Ra, 232Th and 40K; however, it reached 54435, 442105 and 583 Bq.kg-1, respectively, between the studied samples. Furthermore, black sands and phosphate rock samples exhibit the lowest concentration of 226Ra, 232Th and 40K. Results also show that the radon emanation coefficients decrease while the density of materials increases.PMID:35567935 | DOI:10.1016/j.apradiso.2022.110272
Source: Applied Radiation and Isotopes - Category: Radiology Authors: Source Type: research