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Raw materials policy plays an increasingly important role in the economies of countries all over the world. The development of new technologies grows the demand for resources. The list of critical resources accepted by the European Committee contains rare earth elements, commonly referred to as REEs. A prospective way of obtaining these elements is recovering them from power industry wastes originating...
Pierwiastki ziem rzadkich zostały zaliczone do grupy 20 krytycznych surowców mineralnych dla gospodarki UE. Można spodziewać się, że popyt na surowce oraz metale ziem rzadkich będzie się zwiększał wraz z rozwojem nowych technologii i produktów high-tech. W przyrodzie pierwiastki ziem rzadkich występują najczęściej w postaci bastnaesytu (Ce,La)FCO3, monacytu (Ce,La,Y)PO4 i ksenotymu (YPO4). Największe...
This work concerns a three-step process for the recovery of vanadium from heavy oil and Orimulsion combustion fly ashes. This consisted of acid leaching, oxidation and precipitation of the vanadium pentoxide, followed by washing of the precipitate. Preliminary tests were conducted to investigate the effect of some operating parameters for the various steps of the process. After these preliminary tests,...
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