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Results 1 - 10 of 19509.
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AbstractAbstract
[en] Coprecipitation has been studied of beryllium with hydroxides of metals of 2-4,6, and 8 groups of the periodic Table (Zn,Cd,Al,Ga,In,Sc,Y,Th, etc.). It has been shown that the main characteristics of coprecipitation of beryllium (pH of the onset and maximum coprecipitation,pH of the beginning and end of desorption) are affected by the nature of the collectors. It has been stated that sorption ability of the metal hydroxides being studied correlates in respect of beryllium with pH value of the onset of precipitation
Original Title
Radiokhimcheskoe issledovanie soosazhdeniya mikrokolichestv nekotorykh gidrolizuyushchikhsya ehlementov s gidroksidami i oksidami metallov
Primary Subject
Secondary Subject
Source
13 refs.; 7 figs.; 2 tables; for English translation the journal Sov. Radiochem.
Record Type
Journal Article
Journal
Radiokhimiya; v. 19(1); p. 9-15
Country of publication
ALUMINIUM HYDROXIDES, BERYLLIUM HYDROXIDES, CADMIUM HYDROXIDES, COPRECIPITATION, GALLIUM HYDROXIDES, HYDROXIDES, INDIUM HYDROXIDES, LEAD HYDROXIDES, PH VALUE, SCANDIUM HYDROXIDES, TELLURIUM HYDROXIDES, THORIUM HYDROXIDES, TIN HYDROXIDES, TRACE AMOUNTS, TRANSITION ELEMENT COMPOUNDS, YTTRIUM HYDROXIDES, ZINC HYDROXIDES
ACTINIDE COMPOUNDS, ALKALINE EARTH METAL COMPOUNDS, ALUMINIUM COMPOUNDS, BERYLLIUM COMPOUNDS, CADMIUM COMPOUNDS, GALLIUM COMPOUNDS, HYDROGEN COMPOUNDS, INDIUM COMPOUNDS, LEAD COMPOUNDS, OXYGEN COMPOUNDS, PRECIPITATION, SCANDIUM COMPOUNDS, SEPARATION PROCESSES, TELLURIUM COMPOUNDS, THORIUM COMPOUNDS, TIN COMPOUNDS, YTTRIUM COMPOUNDS, ZINC COMPOUNDS
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AbstractAbstract
[en] Studied is the coprecipitation of different quantities of indium (from 1μg to 7.2 mg) with the hydroxides of Sn(4), Fe(3), Th, Be, Cd and Mg depending on solution pH. The coprecipitation of a given element is shown to be described by the same effects which have been previously found in studying coprecipitation of other hydrolizing elements such as berillium, tin(4), iron(3), chromium(3), and cadmium. Basing on the acid-basic nature of the sorbent-sorbate reaction the study finds universal relationships for the above hydrolizing elements with metal hydroxides
Original Title
Radiokhimicheskoe issledovanie soosazhdeniya mikrokolichestv nekotorykh gidrolizuyushchikhsya ehlementov s gidroksidami i oksidami metallov
Primary Subject
Source
For English translation see the journal Soviet Radiochemistry (USA).
Record Type
Journal Article
Journal
Radiokhimiya; ISSN 0033-8311;
; v. 21(4); p. 485-489

Country of publication
ACTINIDE COMPOUNDS, ALKALINE EARTH METAL COMPOUNDS, BERYLLIUM COMPOUNDS, CADMIUM COMPOUNDS, CHEMICAL REACTIONS, DECOMPOSITION, HYDROGEN COMPOUNDS, HYDROXIDES, INDIUM COMPOUNDS, IRON COMPOUNDS, MAGNESIUM COMPOUNDS, OXYGEN COMPOUNDS, PRECIPITATION, SEPARATION PROCESSES, SOLVOLYSIS, THORIUM COMPOUNDS, TIN COMPOUNDS, TRANSITION ELEMENT COMPOUNDS
Reference NumberReference Number
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AbstractAbstract
[en] Coprecipitation of beryllium with hydroxides of amphoteric metals (Zn, Al, Ga, Sn4, Pb2, Te4, Cr3) has been studied upon neutralization of their alkali solutions depending on pH of the solution. Specific features of such coprecipitation have been revealed and compared with a capture of beryllium under conditions of hydrolytic precipitation of the corresponding collectors from acid solutions. In particular, the formation of the stable product of acid-basic interaction has been observed. The product is formed by beryllium with chromium (3) and tin (4) and can be decomposed only upon complete dissolution of the collector in the excess of the acid. The results obtained allow to conclude that the character of coprecipitation of beryllium with metal hydroxides upon neutralization of both acid and alkaline solutions is determined by different acid-basic properties of the microcomponent and the collector
Original Title
Radiokhimicheskoe issledovanie soosazhdeniya mikrokolichestv nekotorykh gidrolizuyushchikhsya ehlementov s gidroksidami i oksidami metallov
Primary Subject
Secondary Subject
Source
For English translation see the journal Sov. Radiochem.
Record Type
Journal Article
Journal
Radiokhimiya; v. 19(1); p. 16-19
Country of publication
ALKALINE EARTH METAL COMPOUNDS, ALUMINIUM COMPOUNDS, BERYLLIUM COMPOUNDS, CHROMIUM COMPOUNDS, GALLIUM COMPOUNDS, HYDROGEN COMPOUNDS, HYDROXIDES, INORGANIC ACIDS, LEAD COMPOUNDS, NITROGEN COMPOUNDS, OXYGEN COMPOUNDS, PRECIPITATION, SEPARATION PROCESSES, TELLURIUM COMPOUNDS, TIN COMPOUNDS, TRANSITION ELEMENT COMPOUNDS, ZINC COMPOUNDS
Reference NumberReference Number
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AbstractAbstract
[en] Studied is the coprecipitation of different cadmium quantities (from 10 μg to 7.05 mg) with Snsup((4)), Fesup((3)), Th, Be and Mg hydroxides depending on solution pH. The pH value of the initial coprecipitation of the microcomponent with the hydroxides of Snsup((4)), Fe((3)), Tn, and Be, was shown to be coincident with the disappearence from the solution of a positively-charged hydroxocomplex of relevant element. It was also shown that the capture of large cadmium quantities (500 μg, 7.05 mg) by tin(4) hydroxide was greatly enhanced when hydrolized microcomponent elements emerged in the solution at pH>5.2. The coincidence of the pH values of the initial cadmium coprecipitation with magnesium hydroxide with the pH initial precipitation value is caused by the fact that for cadmium at pH>8 it is typical to form its principle coprecipitate species, the neutral hydroxocomplex Cd(OH)20, in the solution. An explanation is offered for the controversy existing in literary data. Specifically, it is shown that the competing effects of the macroquantities of indium and aluminium for the capture of cadmium microquantities by iron(3) hydroxide are caused by the presence in the solution of their positively-charged hydroxocomplexes
Original Title
Radiokhimicheskoe issledovanie soosazhdeniya mikrokolichestv nekotorykh gidrolizuyushchikhsya ehlementov s gidroksidami i oksidami metallov
Primary Subject
Source
For English translation see the journal Soviet Radiochemistry (USA).
Record Type
Journal Article
Journal
Radiokhimiya; ISSN 0033-8311;
; v. 21(4); p. 480-484

Country of publication
ACTINIDE COMPOUNDS, ALKALINE EARTH METAL COMPOUNDS, BERYLLIUM COMPOUNDS, CADMIUM COMPOUNDS, CHEMICAL REACTIONS, DECOMPOSITION, HYDROGEN COMPOUNDS, HYDROXIDES, IRON COMPOUNDS, MAGNESIUM COMPOUNDS, OXYGEN COMPOUNDS, PRECIPITATION, SEPARATION PROCESSES, SOLVOLYSIS, THORIUM COMPOUNDS, TIN COMPOUNDS, TRANSITION ELEMENT COMPOUNDS
Reference NumberReference Number
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Kochetkov, V.L.; Plotnikov, V.I.; Taurbaeva, T.I.
Neorganical chemistry and technology of neorganic substances. Radiochemistry. Analytical chemistry. Coordination chemistry1981
Neorganical chemistry and technology of neorganic substances. Radiochemistry. Analytical chemistry. Coordination chemistry1981
AbstractAbstract
No abstract available
Original Title
Issledovanie sorbtsii radioruteniya-103 gidroksidami nekotorykh metallov
Source
AN SSSR, Moscow; p. 190; 1981; p. 190; 12. Mendeleev's conference on general and applied chemistry; Moscow, USSR; 1981; Short note.
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
ALUMINIUM COMPOUNDS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, CHEMICAL REACTIONS, DAYS LIVING RADIOISOTOPES, EUROPIUM COMPOUNDS, EVEN-ODD NUCLEI, GADOLINIUM COMPOUNDS, HYDROGEN COMPOUNDS, HYDROXIDES, INTERMEDIATE MASS NUCLEI, IRON COMPOUNDS, ISOTOPES, NITROGEN COMPOUNDS, NUCLEI, OXYGEN COMPOUNDS, PRECIPITATION, RADIOISOTOPES, RARE EARTH COMPOUNDS, RUTHENIUM ISOTOPES, SEPARATION PROCESSES, TITANIUM COMPOUNDS, TRANSITION ELEMENT COMPOUNDS, YTTRIUM COMPOUNDS, ZIRCONIUM COMPOUNDS
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AbstractAbstract
[en] Sorption of thorium microquantities by hydroxides of bi-, tri-, and tetravalent metals in coprecipitation conditions is investigated. It is shown that sorptive ability of of metal hydroxides relative to thorium decreases with increase of pH value of precipitation beginning, that is with decrease of acidic properties of the collectors in a row Sn(1.1)>Ti(1.1)>Zr(0.8)>Fe(2.0)>Ga(2.8)>In(3.4)>Al(4.0)>Cr(5.)>Be(6.0). It is determined that thorium sorption by metal hydroxides takes place as a result of acid-base interaction between micro- and macrocomponents through heterohydroxocomplex formation type
[ru]
Изучена сорбция малых количеств тория гидроксидами двух-, трех-, и четырехвалентных металлов в условиях соосаждения. Показано, что сорбционная способность гидроксидов металлов по отношению к торию понижается с возрастанием значений pH начала их осаждения, то есть с уменьшением кислотных свойств коллекторов в ряду Sn(1.1)>Ti(1.1)>Zr(0.8)>Fe(2.0)>Ga(2.8)>In(3.4)>Al(4.0)>Cr(5.)>Be(6.0). Установлено, что сорбция тория гидроксидами металлов происходит в результате кислотно-основного взаимодействия между микро- и макрокомпонентом по типу образования гетерогидроксокомплексовOriginal Title
Sorbtsiya toriya gidroksidami metallov
Primary Subject
Source
10 refs.; 5 figs.
Record Type
Journal Article
Journal
Country of publication
ACTINIDE COMPLEXES, ACTINIDE COMPOUNDS, ALKALINE EARTH METAL COMPOUNDS, ALUMINIUM COMPOUNDS, ANTIMONY COMPOUNDS, BERYLLIUM COMPOUNDS, CHROMIUM COMPOUNDS, COMPLEXES, GALLIUM COMPOUNDS, HYDROGEN COMPOUNDS, HYDROXIDES, INDIUM COMPOUNDS, IRON COMPOUNDS, KINETICS, OXYGEN COMPOUNDS, PRECIPITATION, REACTION KINETICS, SEPARATION PROCESSES, TRANSITION ELEMENT COMPOUNDS, ZIRCONIUM COMPOUNDS
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AbstractAbstract
[en] Element atom electronegativities are used when evaluating the relative ability of oxo anions to interact with metal hydroxides M(OH)2 with the production of M2(OH)3X composition basic salts, where M=Mg, Cd, Co(2), Ni(2), Zn and Cu(2); X-oxo anion. The ability of basic salts to resist electrolytic and hydrolytic dissociation in aqueous solutions, which is considerably defined by the character of oxo anion chemical bond in the composition of basic salts and protonated forms, is taken for evaluation. Basic salt resistance to electrolytic and hydrolytic dissociation in characterized by opposite dependences on the values of average oxo anion electronegativity
Original Title
Otsenka otnositel'noj sposobnosti oksoanionov vzaimodejstvovat' s gidroksidami metallov(2)
Primary Subject
Source
12 refs., 1 fig.
Record Type
Journal Article
Journal
Country of publication
ALKALINE EARTH METAL COMPOUNDS, CADMIUM COMPOUNDS, CHARGED PARTICLES, COBALT COMPOUNDS, COPPER COMPOUNDS, HYDROGEN COMPOUNDS, HYDROXIDES, IONS, MAGNESIUM COMPOUNDS, MOLYBDENUM COMPOUNDS, NICKEL COMPOUNDS, OXYGEN COMPOUNDS, TRANSITION ELEMENT COMPOUNDS, TUNGSTEN COMPOUNDS, VANADIUM COMPOUNDS, ZINC COMPOUNDS
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AbstractAbstract
[en] The present report concerns the vibrational spectra and assignments of Ln(OH)3 (Ln = La, Nd, Tm, Eu, Gd, Tb, Dy, and Y). (author)
Primary Subject
Record Type
Journal Article
Journal
Journal of Inorganic and Nuclear Chemistry; ISSN 0022-1902;
; v. 40(4); p. 694-696

Country of publication
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AbstractAbstract
[en] A study was made on sorption of uranium(6) small quantities by hydroxides of some bivalent metals during coprecipitation in the absence of carbonate ions, as well as by cryogranulated hydroxides of bivalent metals and mixed hydroxides of different-valent metals from weakly carbonate solutions depending on pH. It is shown that sorption ability of hydroxides of bivalent metals decreases with respect to uranium(6) with growth of pH of the beginning of their precipitation, that is with decrease of acidic properties of collector in Be>Zn>Cd>Sr series. The same dependence preserves during sorption by cryogranulated hydroxides from weakly carbonate solutions at pH 9.5-10.0 in Zn?>Cu>Pb>Ni>Co series. Uranium(6) sorption is presented as a result of acid-base interaction between micro- and macrocomponents according to the type of formation of heterohydroxocomplexes. 9 refs., 6 figs
Original Title
Sorbtsiya urana(6) gidroksidami metallov. 3. Sorbtsiya urana(6) gidroksidami dvukhvalentnykh i smeshannymi gidroksidami raznovalentnykh metallov
Record Type
Journal Article
Journal
Country of publication
ACTINIDE COMPOUNDS, ALKALINE EARTH METAL COMPOUNDS, BERYLLIUM COMPOUNDS, CADMIUM COMPOUNDS, COBALT COMPOUNDS, COPPER COMPOUNDS, HYDROGEN COMPOUNDS, HYDROXIDES, KINETICS, LEAD COMPOUNDS, NICKEL COMPOUNDS, OXYGEN COMPOUNDS, PRECIPITATION, REACTION KINETICS, SEPARATION PROCESSES, SORPTION, STRONTIUM COMPOUNDS, TRANSITION ELEMENT COMPOUNDS, ZINC COMPOUNDS
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AbstractAbstract
[en] Boron sorption with metal hydroxides, prepared in the form of granulated material, has been realized when using the regime of repeating cycles of sorption and desorption. Bivalent metal hydroxides with the structure of brucite (Mg, Mn, Fe, Co, Ni and Cd) adsorb B4O72- ions from solutions due to the exchange with OH- ions. The adsorption depends on the value of hydroxide basicity constant. Using Ni(OH)2 as an example, it is shown that the sorption products present basic salt of nonstoichiometric composition with the structure of nickel hydroxinitrate type. Desorption of boron ions is exercised with the NaOH solution
Original Title
Sorbtsiya bora iz rastvorov gidrookisyami dvukhvalentnykh metallov
Primary Subject
Source
For English translation see the journal Journal of Applied Chemistry of the USSR (USA).
Record Type
Journal Article
Journal
Zhurnal Prikladnoj Khimii; ISSN 0044-4618;
; v. 56(4); p. 767-772

Country of publication
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