The use of 228Th has seen limited application for determining sedimentation and mass accumulation rates in coastal marine environments. Recent analytical advances have enabled rapid, precise measurements particle-bound using a radium delayed coincidence counting system (RaDeCC). Herein we review the cycle environment revisit historical as tracer sediment vertical accretion light new measurement...

The mean annual effective dose from natural radionuclides for users of drilled wells was estimated to be 0.41 mSv, for users of wells dug in the ground 0.05 mSv and for people using water from waterworks 0.02 mSv. The highest effective dose from drinking water was caused by 222Rn (Fig. 2) constituting 75% and 60% of the total effective dose caused by all natural radionuclides for drilled-well u...

Depth profiles and cumulative deposition of four fallout radionuclides (7Be, 137Cs, 210Pb and 239,240Pu) were determined in presumably undisturbed soils in Taiwan. Inventories of these radionuclides in different areas correlate significantly with each other (except 7Be) and with mean annual rainfall, providing a necessary condition for the development of soil erosion studies in Taiwan. However,...

Flue gas desulfurization (FGD) waste is an industrial by-product generated during the flue process in coal-fired power plants. This contain trace quantities of naturally occurring radionuclides and elements such as As, Ba, Co, Cr, Zn. The characteristics FGD are important for its reuse mainly depend on process. In this work, two types materials collected from three plants using semi-dry wet pro...

In environment radiation measurement, calculation the correction factors are critical, especially for low energy measurement because of self-absorption phenomena. this work main purpose is to determination lead-210 (210Pb) (46.5keV) in various samples (7 sediments, 5 soil) using an experimental method called Spike Method. The were collecting from different places Syrian. They prepared according...

Studies have been made in the rat of the elimination of 210Pb in the bile after the intravenous injection of ioo ,ug. of lead. Four groups of rats were used: in two the bile was drained by cannulation of the bile duct, and in the other two the bile flow to the duodenum was interrupted by ligation or division of the bile duct. The radioactivity of the bile, of the intestinal walls, and of the in...