نتایج جستجو برای: 228ra
تعداد نتایج: 109 فیلتر نتایج به سال:
The paper presents the results of research on rare earth elements (REY) and selected radionuclides in barren rocks deposited a heap at mine belonging to Polish Mining Group (the largest producer hard coal EU countries). maximum concentration REEs determined silstones was 261.6 mg/kg sandstones 221.2 mg/kg. average uranium thorium content 6.8 11.6 mg/kg, respectively. On other hand, samples burn...
Distribution of radionuclides in different parts of a mushroom: influence of the degree of maturity.
Mushrooms are known to be bioaccumulators of radionuclides, but little is known about their distribution within the fruiting bodies or the influence of the degree of maturity on uptake. We carried out a series of cultures of the species Pleurotus eryngii under controlled laboratory conditions to analyze these variables. The maximal uptake of 134Cs and 85Sr was found to occur in mature fruiting ...
This study assessed the radiological health hazards to various body organs of workers working within Transnet Precinct in Richards Bay in Kwazulu-Natal, South Africa due to radionuclide content of mineral ores often stored within the facility. Thirty samples were collected from five mineral ores (rock phosphate, rutile, zircon, coal and hematite) and analyzed for 238U, 234U, 226Ra, 210Pb, 235U,...
Phosphate and environmental samples were collected from Abu Tartor phosphate mine and the surrounding region. The activity concentration of 226Ra (238U) series, 232Th series and 40K were measured using a gamma-ray spectrometer. The activities of uranium isotopes (238U, 235U and 234U) and 210Pb were measured using an alpha spectrometer and a low-background proportional gas counting system, respe...
In the absence of permanent rivers or bodies of water half of the Saudi Arabia domestic water consumption is provided through desalination. The other half is derived from groundwater. Groundwater from the Disi aquifer is already used for drinking water in parts of Jordan and, more extensively, in Saudi Arabia, where it is known as the Saq aquifer. Some of the geological analyses of the host san...
The interaction of surface water and groundwater is important in the ecology coastal basins, affecting hydrological conditions, oxygen regime, carbon, nutrient exchange. This study demonstrates a dynamic connection between salt-wedge region its underlying aquifer eutrophic estuary. In winter, this estuary covered with ice, river flow at lowest; that why specific response to discharge best marke...
A vertical pattern of fractionated polycyclic aromatic hydrocarbons (PAH) was studied in the Japan Basin Sea Japan. The highest PAH concentration found mesopelagic realm, possibly resulting from deep convection and/or subduction intermediate water and its biogeochemical setting western Basin. Using 226Ra 228Ra as tracers revealed load open sea coastal polluted water. Dissolved PAHs (DPAH, fract...
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