Evaluation of Natural Radioactivity and Excess Lifetime Cancer Risk Due To Gamma Dose Rates from Egyptian Black Sand and Its Components




Full Length Research Paper I Published August,2016


Journal of Physical Science and Environmental Studies Vol. 2 (2), pp. 30-37


Scientific investigations have long concluded that prolonged exposure to low dose of radioactivity can induce deleterious effects in human. The aim of this work is to investigate the radioactivity in black sand and its components that are suspected to have natural radioactivity radiation risk in Egypt. High-resolution gamma-ray spectrometry (HPGe) detector was used to detect the radioactive elements abundance in "Abu-Khashaba" located at 5 Km east of Rosetta north Nile Delta. It was noticed that, Radium, thorium and potassium are concentrated in black sand and its components especially monazite and zircon. Radium equivalent activity (Raeq), outdoor and indoor external dose and total average annual effective dose were measured. The hazard indices and total excess lifetime cancer risk (ELCR) were measured to be higher than the worlds average values for most samples. The harmful radiation effects are posing to human going to the area under investigation.

Key words: Black sand, HPGe Detector, Activity concentration, Annual effective dose rate, Excess life time cancer risk (ELCR).

Full Text-PDF