الفهرس 
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Abstract
In our work we have investigated the radioactive metals 226Ra (238U) series, 232Th series, 40K and 137Cs radionuclides) and the heavy metals (Zn, Fe, Mn, Ni, Cu, Pb and Cd.) were determined in the collected samples. In The 1st part of the thesis includes the environmental monitoring of ambient gamma radiation levels in Red Sea coast of Egypt. It was found that the results of the radiation hazard indices for soil samples that have the values of 72.05±3.41, 40.01±1.76, 0.20±0.01 and 255.78±11.16 for radium equivalent activity (Raeq) in (Bq/Kg), absorbed dose rate in nSv/h in air (D), external hazard index (Hex) and the annual gonadal dose equivalent (AGDE. μSv/y), respectively in winter. While that values for summer samples were 91.49±3.66, 49.14±1.88, 0.25±0.01 and 312.78±11.86, respectively. and the
results of the radiation hazard indices for shore sediment samples have the values of 50.74±2.04, 29.07±1.09, 0.14±0.01 and 186.51±6.91 for radium equivalent activity (Raeq) in (Bq/Kg), absorbed dose rate in nSv/h in air (D), external hazard index (Hex) and the annual gonadal dose equivalent (AGDE) (μSv/y), respectively in winter. While that values for summer samples were 58.06±2.80, 33.16±1.46, 0.16±0.01 and 212.75±9.23, respectively. The obtained results show that the transfer factor from soil to plant were in the order 40K > 226Ra> 232Th that is consistent with the solubility and mobility of these nuclides in soil. - In The 2nd part includes the results of collected (soil, shore sediment and water samples) and analysis of 7 heavy elements (Zn, Fe, Mn, Ni, Cu, Pb and Cd.). For the soil samples of Red Sea Coast of Egypt, it was found that
the mean concentrations of Zn, Fe, Mn, Ni, Cu, Pb and Cd ions are 137.8,
862.44, 70.75, 23.51, 24.5, 25.54 and 11.15 μg/kg dry weight, respectively. For the shore sediment samples, it was found that the mean concentrations of Zn, Fe,