scholarly journals External radiation exposure of the Angolan population living in adobe houses

2019 ◽  
Vol 323 (1) ◽  
pp. 353-364 ◽  
Author(s):  
Judith Salupeto-Dembo ◽  
Zsuzsanna Szabó-Krausz ◽  
Péter Völgyesi ◽  
Zoltán Kis ◽  
Csaba Szabό
Keyword(s):  
Building Material ◽  
Gamma Ray ◽  
Radiation Risk ◽  
Radiation Hazard ◽  
External Radiation ◽  
Hazard Indices ◽  
Remote Areas ◽  
Activity Concentrations ◽  
Radiation Hazard Indices ◽  
Geological Formations

AbstractThis study aims to investigate the radioactivity of adobe in Angola, where it is a widely used building material. Sixty samples have been collected from three remote areas of the country with different geological backgrounds (Cabinda, Huambo, Menongue). Activity concentrations of 226Ra, 232Th and 40K have been determined by gamma-ray spectroscopy and radiation hazard indices were also calculated. The area Huambo shows elevated 226Ra and 232Th values which can be explained by its older geological formations. 40K concentrations are low in general. Regarding external radiation risk, adobe from Angola is safe to use as building material.

scholarly journals Radiation hazard indices in the application of phosphogypsum mixtures as a building material: proposal for a Brazilian regulation

2019 ◽  
Vol 7 (3) ◽  
Author(s):  
Marcelo Francis Máduar ◽  
Barbara Paci Mazzilli ◽  
Marcelo Bessa Nisti
Keyword(s):  
Environmental Impact ◽  
Building Material ◽  
Total Concentration ◽  
Natural Radionuclides ◽  
Final Concentration ◽  
Radiation Hazard ◽  
Radiological Protection ◽  
Hazard Indices ◽  
Activity Concentrations ◽  
Radiation Hazard Indices

Phosphogypsum (PG), a by-product from the phosphoric acid industry, is being worldwide stockpiled, posing environmental problems. Viability of the PG safe re-use in civil construction has been studied, as PG can contain natural radionuclides in significant concentrations. We propose a policy for using PG as a building material, limiting the total concentration of 226Ra plus 228Ra by mixing PG with natural gypsum. It was concluded that PG from the largest Brazilian deposits could be used without any dilution, when the sum of the activity concentrations of 226Ra and 228Ra does not exceed 150 Bq kg-1. For higher values, the approach is to mix PG with increasing amounts of natural gypsum, so that the final concentration does not exceed 1000 Bq kg-1. We show that PG re-use in such a way is feasible in terms of radiological protection and recommended to minimize PG piles environmental impact

scholarly journals Elemental Analysis and Natural Radioactivity Levels of Clay by Gamma Ray Spectrometer and Instrumental Neutron Activation Analysis

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
W. R. Alharbi ◽  
A. El-Taher
Keyword(s):  
Elemental Analysis ◽  
Building Materials ◽  
Gamma Ray ◽  
Raw Materials ◽  
Natural Radionuclides ◽  
Radiation Hazard ◽  
Hazard Indices ◽  
Gamma Ray Spectrometer ◽  
Radium Equivalent ◽  
Effective Doses

Due to increased global demand for clay, the present work involves the use of INAA for elemental analysis and pollutants concentration in clay. The samples were collected from Aswan in South Egypt. The samples were irradiated using the thermal neutrons “at the TRIGA Mainz research reactor” and at a neutron flux “of 7 × 10 n/cm s”. Twenty-six elements quantitatively and qualitatively were specified for the first time upon studying the samples. The elements determined are U, Th, Ta, Hf, Lu, Eu, Ce, Ba, Sn, Nb, Rb, Zn, Co, Fe, Cr, Sc, Sm, La, Yb, As, Ga, K, Mn, Na, Ti, and Mg. The concentrations of natural radionuclides232Th,226Ra, and40K were also calculated. Based on these concentrations, to estimate the exposure risk for using clay as raw materials in building materials, the radiation hazard indices such as radium equivalent activities, effective doses rate, and the external hazard indices have been computed. The obtained results were compared with analogous studies carried out in other countries and with the UNSCEAR reports.

Estimation of radiation hazard indices from natural radioactivity of some rocks

2006 ◽  
Vol 17 (2) ◽  
pp. 118-122 ◽  
Author(s):  
A ABBADY ◽  
N AHMED ◽  
A ELARABI ◽  
R MICHEL ◽  
A ELKAMEL ◽  
...  
Keyword(s):  
Natural Radioactivity ◽  
Radiation Hazard ◽  
Hazard Indices ◽  
Radiation Hazard Indices
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