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Solution Purification
Published in C. K. Gupta, T. K. Mukherjee, Hydrometallurgy in Extraction Processes, 2017
However, it is not essential for the amine to extract uranium only by the exchange of anionic metal species. It can as well extract uranium through neutral uranyl sulfate species as per the following addition reaction () UO2SO4aq+(R3NH)2SO4org⇄(R3NH)2.UO2(SO2)2org
Emission and Absorption, ca. 1800-1870
Published in John C.D. Brand, Lines of Light, 2017
Edmond’s son, Henri Becquerel (1852-1908), was trained as an engineer, though his research interest followed that of his father. His doctoral work included an attempt to use phosphorescence stimulated by infrared illumination as an infrared detector (it was too insensitive). Roentgen’s discovery of X-rays prompted Becquerel, now familiar with lumi nescence phenomena of many kinds, to determine if visible phosphors emitted similar penetrating radiation. Tests of the properties of potassium uranyl sulfate led to the discovery of radioactivity. Becquerel shared the 1903 Nobel Prize for physics with Pierre and Marie Curie.
The Other Energy Markets
Published in Anco S. Blazev, Global Energy Market Trends, 2021
Yellowcake is a coarse powder which has a pungent odor, is insoluble in water and contains about 80% uranium oxide (U3O8), which melts at approximately 5212.4°F. It contains, among other things; uranyl hydroxide, uranyl sulfate, sodium para-uranate, and uranyl peroxide, and some uranium oxides.
Development of practical decontamination process for the removal of uranium from gravel
Published in Environmental Technology, 2018
Ilgook Kim, Gye-Nam Kim, Seung-Soo Kim, Jong-Won Choi
The extraction of uranium from soil can be achieved through ex situ soil washing or in situ soil flushing. Soil washing approach is the most common way for the remediation of soil polluted with radionuclides. Soil washing entails the extraction of contaminants from soil with solutions, where the contaminants are extracted from the soil matrix and transferred to the washing solution and then the washing solution is separated from the soil [2]. There have been a large number of investigations showing that the extraction efficiency of soil washing can be improved by using inorganic (i.e. H2SO4, HCl, HNO3, and NaOH) or organic (i.e. EDTA, citric acid, and oxalic acid) reagents with distinctive features. The objective of adding these reagents is the formation of weakly anionic metal complexes, which are easily separated from the soil matrix [3–7]. In particular, sulfuric acid has been commonly used for uranium leaching from concentrated ores or for the decontamination of uranium-polluted soil [8]. Uranium trioxide is relatively easily dissolved in sulfuric acid, resulting in conversion into uranyl sulfate.