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000000516 037__ $$aROMDOC-THESIS-2010-006
000000516 041__ $$arum
000000516 100__ $$aPopescu, Vasile
000000516 245__ $$aContribuţii la separarea prin flotaţie a speciilor LaIII şi YIII din sisteme apoase şi valori 
000000516 260__ $$c2007-01-01
000000516 520__ $$aThe original contributions of this work refers to the separation and concentration by flotation of YIII and LaIII ions from aqueous solutions in mono- MIII-STA, di- MIII-CuII-STA and tri-component MIII-BaII-CuII-STA systems; the ion separation is simultaneously and quantitative, with applications in environmental protection and separatology science. The obtained sublate, containing the complex insoluble species, was transformed in oxidic compounds. The process schemes, which can be also applied on other systems, were proposed. For a correct evaluation of the research results in the tricomponent system MIII-BaII-CuII-STA, an alternative way was the forced hydrolysis; with this method, polynuclear complex combinations mixed-oxides precursors are obtained. The study of interaction and the formulation of the separated complex combinations in mono-, di- and tri-component systems are based on the results of elemental analysis, UV-VIS, FT-IR and reflexion electronic spectroscopy, ICP and thermal analysis. The characterization of the oxide powders obtained by thermal treatments was done by undistructive physico-chemical techniques: X-ray diffraction, scanning electronic microscopy (SEM) and electrical conductivity in the range 75-300 K.      
000000516 8560_ $$fmihagabi@gmail.com
000000516 8564_ $$uhttp://romdoc.upb.ro/record/516/files/$$zAccess to Fulltext
000000516 909CO $$ooai:romdoc.upb.ro:516$$pglobal
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000000516 980__ $$aTHESIS