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Article
Purification of Ammonium Molybdate and Tungstate Aqueous Solutions To Remove Phosphate, Arsenate, and Silicate Anions with a Composite Sorbent Based on KU-23 and KM-2p Cation Exchangers
Selectivity sorption of phosphate, arsenate, and silicate anionic impurities from concentrated aqueous solutions of ammonium molybdate and tungstate by a composite sorbent consisting of macroporous KU-23 (or K...
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Article
Acid-Base Properties and Structural Features of Composite Ion Exchangers Based on KU-23 and KM-2p Cation Exchangers and Hydrated Zirconium Oxide
A method for introduction of hydrated zirconium oxide into macroporous cation exchangers KU-23 and KM-2p and the acid-base properties and structural features of the composite ion exchangers are described.
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Article
Composite Ion Exchangers Based on KU-23 and KM-2P Cation Exchangers and Nickel(III) Hydroxide and Their Use for Purification of Nickel Sulfate Solutions To Remove Cobalt(II) Impurity
A method of preparing composite ion exchangers based on macroporous cation exchangers and nickel(III) hydroxide was developed, and their suitability for deep purification of nickel(II) sulfate solutions to rem...
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Article
Sorption Purification of Aqueous Ammonium Molybdate To Remove Tungsten Impurities with a Cation Exchanger Containing Pyrocatechol Functional Groups
The sorption of molybdenum(VI) and tungsten(VI) from weakly alkaline and neutral solutions with PK-S cation exchanger containing pyrocatechol functional groups was studied. The possibility of selective recover...
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Article
Sorption of Rhenium(VII) on Gel and Macroporous Anion Exchangers of Different Basicities from Solutions of Mineral Acids and Their Ammonium Salts
Equilibrium sorption of rhenium on strongly basic gel-like anion exchanger Purolite A600, on weakly acidic anion exchangers Purolite A170 and A172 with macroporous and gel structures and on composite anion exc...
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Article
Prospects for development of a process for recovering technetium from spent fuel of nuclear power plants
Comperative analysis is made of the Tc behavior in different stages of spent fuel reprocessing, to make a decision on the process allowing separation of Tc as an individual product. The electrochemical and sor...
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Article
Ion-exchange recovery of palladium(II) from multicomponent chloride solutions
Ion-exchange sorption of palladium(II) from both concentrated aqueous hydrochloric acid solution containing Fe(III), Sn(II), Zn(II), and Cu(II) and weakly acidic concentrated aqueous ammonium chloride solution...
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Article
Kinetics of platinum(II) and platinum(IV) sorption from hydrochloric acid solutions with a complexing ion exchanger containing thiourea functional groups and with a strongly basic anion exchanger
The kinetics of platinum(II) and platinum(IV) sorption from 2 M HCl with Purolite S920 complexing ion exchanger containing thiourea functional groups and Purolite A500 strongly basic anion exchanger was studie...
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Article
Kinetics of rhenium sorption from weakly basic macroporous and gel anion exchangers Purolite A170 and Purolite A172 from sulfuric acid solutions
Effect of the grain size of anion exchangers, agitation intensity, and temperature on the kinetics of rhenium sorption on weakly basic macroporous and gel anion exchangers Purolite A170 and Purolite A172 from ...
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Article
Specific features of rhenium desorption from weakly basic anion exchangers Purolite A170 and Purolite A172 with ammonia solutions
Equilibrium, kinetics, and dynamics of rhenium desorption from weakly basic macroporous (Purolite A170) and gel anion (Purolite A172) exchangers with ammonia solutions were studied. The effective diffusion coe...
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Article
Institutional framework and economic growth factors in Russia in the long term
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Article
Precise calibration of thickness and composition of epitaxial AlGaAs heterostructures with vertical-cavity optical microresonators
We have studied the possibility of determining the actual thicknesses and compositions of separate layers in AlGaAs heterostructures with vertical-cavity optical microresonators by the combined use of optical ...
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Article
Effect of the photon lifetime on the characteristics of 850-nm vertical-cavity surface-emitting lasers with fully doped distributed Bragg reflectors and an oxide current aperture
The effect of the photon lifetime in an optical microcavity on the characteristics of 850-nm vertical-cavity surface-emitting lasers (VCSELs) with fully doped distributed Bragg reflectors (DBRs) and an oxide c...
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Article
Study of high-speed semiconductor VCSELs based on AlInGaAs heterostructures with large gain-cavity detuning
The effect of the spectral detuning between the spectral gain maximum of an active region based on AlInGaAs nanoheterostructures and vertical microcavity resonance (gain-cavity detuning) on the steady-state- a...
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Article
Use of ion-exchange resins to deal with the effect of preg-robbing of gold in the course of cyanide leaching
Possibility of using strongly basic anion exchange resin of MINIX brand and weakly basic anion exchange resin Purogold S992 brand in the high-temperature- caustic conditioning (HiTeCC) technological process fo...
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Article
The effect of sulfide passivation on luminescence from microdisks with quantum wells and quantum dots
Sulfide passivation has been used to reduce the surface nonradiative recombination rate in micro- disk mesas based on (AlGaIn)As/GaAS heterostructures the active region of which is constituted either by ten Ga...
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Article
Sorption purification of sodium molybdate solutions to remove vanadium(V) impurity
Possibility of performing deep purification of concentrated sodium molybdate solutions to remove vanadium(V) impurity by selective sorption of vanadium(V) from the solutions with fixed pH values on a strong ba...
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Article
Optical properties of InGaAs/InGaAlAs quantum wells for the 1520–1580 nm spectral range
The optical properties of elastically strained semiconductor heterostructures with InGaAs/InGaAlAs quantum wells (QWs), intended for use in the formation of the active region of lasers emitting in the spectral...
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Article
Recovery of economic growth in Russia
The presented paper of the Institute of Economic Forecasting of the Russian Academy of Sciences analyzes key macroeconomic and financial measures of contemporary Russian anticrisis policy, substantiates the ma...
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Article
A study of distributed dielectric bragg reflectors for vertically emitting lasers of the near-IR range
Studies aimed at optimization of the design of a dielectric distributed Bragg reflector (DBR) produced by the reactive magnetron sputtering method for applications in near-IR vertical-cavity surface-emitting l...
