Assessment of Natural Radioactivity and Some Heavy Metals Contamination along Aqaba Gulf, Egypt
Journal Title: International Journal of Engineering and Science Invention - Year 2018, Vol 7, Issue 6
Abstract
Aqaba Gulf is an economically important marine environment in Egypt. Its coastal area was subjected to anthropogenic impact of urbanization and economic development during the last decades. The study was oriented to investigate the natural radioactivity levels as well as assess the physicochemical properties of marine water and heavy metal pollution in selected some environmental samples like shore sediment, water and algae samples collected from 18 sites along the Egyptian coastline of the Gulf of Aqaba. The samples were prepared and the activity concentrations of 226Ra, 232Th and 40K in the samples were measured using Hyper Purity Germanium detector. The results for the measurements of natural radioactivity revealed that, the mean average of absorbed dose rate (D), annual effective dose rate (AEDE), radium equivalent (Raeq), external and internal hazard indices and the total hazard index (Hex+Hin) fall within the worldwide averages. The Transfer Factor (TF) average values were 0.19, 0.13, and 2.65 for 238U, 232Th and 40K, respectively. The TF for 40K was greater than unity, which means that 40K was bio accumulated in algae and available in marine environment. The recorded and calculated values were lower than the acceptable limits published in the different localities around the world. The investigations of the physicochemical properties of the surface water indicated that there no significant change was observed in the water temperature, TDS, salinity, pH levels and well-oxygenated seawater. In general, the concentrations levels of heavy elements in seawater and shore sediments in northern part of the Gulf were higher than the concentrations in southern part for most of the elements where there are human activities. The results also suggest that the majority of the Egyptian coast is not polluted or seriously affected by human activities in spite of rapid recreational and residential developments in the area during the past period.
Authors and Affiliations
Abou Bakr Ramadan, Hanan M. Diab, E. A. Saad, Amir E. A. El Hassan, M. Shahin
Keywords
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