Environmental Radioactivity Monitoring Using High Resolution Gamma-ray Spectrometer for Lake Manzala in Egypt

Abstract

The environmental radioactivity of the Lake Manzala, Egypt, has been investigated to determine the level of the natural radioactivity and the radiological impact for the targeted area. Twenty sediment samples were collected from pre-determined locations, which involve deep springs and lakes, particularly samples taken from places receiving sewage pollutants, fertilizers and disinfection materials used in the agricultural area and fish farms. The gamma-emitting nuclides library has been designed to assess the activity concentration for radionuclides belonging to the natural series of uranium and thorium ( 208 Tl, 212 Bi, 212 Pb, 214 Bi, 214 Pb, 226 Ra, 228 Ac, 234 Th, 235 U), and 40 K gamma-line. The measured overall average value of the radionuclides' activity concentration was 15 Bq/kg, while for 40 K was 286 Bq/kg. The true coincidence summing was corrected using the Genie-2000 software, and LabSOCS was used to calculate the total efficiencies. Most of the resulted values are moderated, indicating normal levels compared to the international and worldwide reference values in this regard.

Correlation Influence and Quantification of Grain Size on Radon Radioactivity for (Ca2SiO4) Ore Rocks

“…The Wadi Feiran-Solaf metamorphic complex constitutes an elongated folded belt in southern Sinai, Egypt, that is about 40 km long and 5-11 km wide, trending NW-SE parallel to the orientation of the Najd fault system as shown in Fig. (1). It has evolved and was exhumed in close connection with the activity of this shear zone system [25,26].…”

“…Calcium silicate rocks were gathered from ore quarries in the Sinai Peninsula, and their most notable use is in building materials such as some forms of pottery, glass, and cement of all types. The chemical composition of investigated samples was measured by using X-ray fluorescence analysis (XRF) and Table (1) gives the oxide content of detected elements. The collected rock samples were dehydrated for 60 min.…”

“…The process of decay is attributed to the effect of nuclear particles or photon emissions, which carry the surplus energy. Because nuclear radiation can occur in a variety of kinds, abundances, and energy that are unique to each radionuclide, radioactivity analysis is a sophisticated process aimed at identifying and quantifying radioactive isotopes [1]. Relying on the geographical and geological aspects of the environment, naturally occurring radionuclide deposits in the sediments and rocks [2].…”

“…There are numerous types of SSNTDs have been enabled to measure radon radioactivity concentration. The cultivated NTD has a distinctive resolution of charged particles [1,[10][11][12][13]. Numerous literature studies accomplished to explore the encompasses of some physical and chemical factors, for example, bulk etching and optical properties of the NTDs [8,[14][15][16].…”

Evaluation of Radon Radioactivity and Radiological Impact by Using Solid-State Nuclear Track Detector for Erediya younger granites of Central Eastern Desert in Egypt

“…Solid-State Nuclear Track Detectors (SSNTDs) are used widely in technical applications for numerous investigations of environmental radioactivity and geophysics studies. Environmental radiation is due to various radioactive nuclides present in the sediment and rocks distributed depending on the region's geological and geographical features, so radionuclides have been present on the earth's surface [11][12][13][14][15]. Among the different isotopes of radon, the study was carried to determine the concentration of 222 Rn, which decays with a half-life of 3.82 days into many short-lived but highly alpha emitter daughter progenies like 218 Po and 214 Po [16][17][18][19][20].…”