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Article
Gas Phase Conversion of Cation Exchange Resin KU-2×8-M (M = Cs, Ni, Cu, Fe, Nd, U) in a Nitrating Atmosphere
A new approach to the destructive processing of the cation exchange resin KU-2×8-M (M = Cs, Ni, Cu, Fe, Nd, U) is considered based on the gas phase treatment in a nitrating atmosphere with subsequent chemical ...
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Article
Electrochemical Oxidation in Aqueous Solutions of Organic Complexing Agents and Surfactants
The electrochemical oxidation (ECO) of aqueous solutions of organic complexing agents [ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), diethylenetriaminepentaacetic acid (DTPA)] and surfac...
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Article
Gas-Phase Treatment of Dump Tailings from Metallurgical Plants in Nitrating Media to Enhance Nickel Extraction
A new approach to the processing of the dump waste product stored in the tailings dumps of the nickel production enterprise Punda Gourda (Cuba) has been proposed to increase the yield of Ni obtained from it. T...
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Article
Gas-Phase Treatment of Metallurgical Fly Ash in Nitrating Media to Increase the Recovery of Valuable Components Using the Example of Fly Ash Produced by MMC Norilsk Nickel
A new approach is proposed to increase the recovery of Ni and Cu from the fly ash formed by roasting the copper–nickel matte in the production of nickel at PAO MMC Norilsk Nickel. This approach is based on the...
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Article
Organization of Counter-Mixing of Ozone Flows and Aqueous Solutions
The dissolution of concentrated ozone in water at liquid and gas counter-flows has been studied. It was shown that the ozone flow rate can be increased from 0.042 cm3/s cm2 (flotation treatment of water with ozon...
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Article
Cleaning of Industrial Waters Containing Cyanides by Using a Combination of Ozone and Hydrogen Peroxide
We study the process of oxidation of cyanides, thiocianates, and complex cyanides by a combination of ozone with hydrogen peroxide (peroxone reagent) in model solutions and sorption tails of a gold recovery pl...
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Article
Assessment of the Applicability of an Iron-Containing Composite for the Purification of Transformer Oils
The possibility of using a composite material (hereinafter referred to as composite) based on silica gel modified with particles of Fe(III) compounds for the highly efficient purification of contaminated trans...
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Article
Recycling of polyethylene terephthalate wastes under the action of a gaseous nitrating mixture
A new method for recycling of polyethylene terephthalate (PET) wastes, which is based on their processing under the action of a nitrating atmosphere and a subsequent utilization of the conversion products, is ...
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Article
Electrochemical, Structural, and Thermogravimetric Studies of Activated Supercapacitor Electrodes Based on Carbonized Cellulose Cloth
The high–temperature reagentless activation of carbonized cellulose cloth is used to manufacture supercapacitor (SC) electrodes with different fast times of activation t. It is established by means of the standar...
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Article
Extraction of Organic Compounds from Aqueous Solutions by the Nanofiltration Method
Extraction from aqueous solutions of oxalate and ethylenediaminetetraacetate (EDTA) ions, anionic (ASF) and nonionogenic (NSF) surfactants, and a complex of Co(III) with EDTA by the nanofiltration (NF) method ...
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Article
Solubility of Ozone in Aqueous Solutions of Oxalic Acid and Potassium and Sodium Nitrates: Determination of the Anion-Specific Parameter for the Oxalate Ion in a Model for the Solubility of Gases in Electrolyte Solutions
The solubility of ozone in solutions of oxalic acid H2C2O4 and potassium nitrate at concentrations up to 1 and 2 M, respectively, is studied at 25°C. The Sechenov constants for these electrolyte solutions are fou...
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Article
Inorganic Sorbents Modified with Iron Compounds for Absorption of As(V) from Water
Granulated inorganic sorbents based on KSKG silica gel and aluminum oxide modified with Fe(III) compounds were developed for water purification from As(V). Physicochemical properties of synthesized sorbents we...
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Article
Changes in the Physicochemical Characteristics of Cellulose upon Its γ-Irradiation and the Subsequent Mercerization
Changes in the molecular-weight distributions of low-molecular-weight and alkali cellulose after the processes of γ-irradiation and mercerization of cellulose have been studied. The features of the dissolution...
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Article
Effect of γ-Irradiation of Cellulose on the Molecular-Weight Characteristics of Nitro Esters Produced from It
The effect of γ-irradiation of cotton cellulose on the molecular-weight distribution (MWD) of the nitro esters prepared from the irradiated cellulose has been studied. It has been established that the degradat...
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Article
Oxidative decomposition of oxalate ion with ozone in aqueous solution
The oxidation of oxalate ions with ozone in aqueous solution has been studied, and the effects of pH, temperature, and reactant concentrations on the reaction rate and efficiency have been estimated. The oxida...
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Article
Sorption of arsenic onto inorganic sorbents modified with iron compounds
Granulated inorganic sorbents based on silica gel of KSKG grade and aluminum oxide and modified with Fe(III) compounds were developed for water treatment to remove As(V). The influence of the particle size of ...
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Article
Photo-oxidative degradation of oxalate ions with concentrated ozone using high-intensity pulsed continuum UV radiation
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Article
Measuring the specific surface area of carbon nanomaterials by different methods
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Article
Photodecomposition of dodecyltrimethylammonium bromide in aqueous solutions in presence of hydrogen peroxide
It is established that the cationic surfactant (dodecyltrimethylammonium bromide, DTAB) efficiently decomposes in an aqueous solution in the presence of H2O2 upon exposure to UV radiation. The presence of bicarbo...
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Article
Recovery of 60Co from EDTA-containing aqueous solutions
The possibility of recovering radioactive cobalt from EDTA-containing aqueous solutions using oxidation (O3) and photooxidation (UV/H2O2) methods was examined. The optimal amounts of reagents ensuring complete de...
