Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Naturally occurring radionuclides"”.
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Towards establishing a fit-for-purpose regulatory framework for radiation protection in Western Australia's mining industry: Evaluating mine worker exposures to naturally occurring radionuclides
… development, and high levels of activity are occurring in the state’s nascent critical minerals sector, with 168 WA-based companies pursuing rare earths-bearing minerals, 51 of which are actively drilling on their tenements. WA’s mineral deposits typically contain levels of the naturally …
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Development of techniques for high-resolution spatially-resolved elemental analysis in materials of interest in luminescence dating
… sample heterogeneity, with respect to naturally occurring radionuclides, may significantly reduce the levels of accuracy associated with experimentally determined luminescence dates. The aim of this thesis is to develop a series of high-resolution, spatially resolved techniques to …
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Applications of phytase-mediated phosphate biomineralizaton for the remediation of uranium mine tailings
… the mobilisation of contaminants, including naturally occurring radionuclides.;Phosphate mineral phases have been researched as a method of immobilising contaminants including lead, radium, and uranium as natural analogues demonstrate that these metals can be stably incorporated into …
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Phosphorous cycling in the Gulf of Maine : a multi-tracer approach
… within the southwestern Gulf of Maine using the naturally occurring radionuclides phosphorus-32 (t_= 14.3 d), phosphorus-33 (t_ = 25.3 d), thorium-234 (t_ = 24.1) and beryllium-7 (t_ = 53.3 d). New techniques were developed for the extraction, purification and measurement of 32p and 33p in …
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Marine thorium and protactinium distributions: Tools for past and present chemical flux
… is an oceanographic exploration of the naturally-occurring radionuclides 230Th, 232Th and 231Pa aimed to better understand how their scavenging behavior can be utilized to trace chemical flux in the modern and the past ocean. While 230Th and 231Pa are produced by the radioactive decay of …
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Natural radioactivity in soils of the Walvis Bay - Henties Bay coastal area, Namibia
Naturally occurring radionuclides such as 238U, 232Th and 40K are present in the soil where they disintegrate spontaneously releasing ionizing radiation which could pose health hazards to the inhabitants of a given location especially when the concentrations of the radionuclides are high. In …
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Assessment of natural radioactivity in the soils of the Ohorongo Cement plant and the town of Otavi, Namibia
The activity concentrations of the naturally occurring radionuclides 238U, 232Th, and 40K in soil samples collected from the Ohorongo Cement plant and the town of Otavi, Namibia have been determined using a High-Purity Germanium (HPGe) detector. In addition, an assessment of the radiological …