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Influence of Coagulation–Filtration Processes on the Turbidity Dynamics of Natural Water 混凝-过滤工艺对天然水浊度动态的影响
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S004057952670065X
O. M. Rosenthal, A. G. Sambursky
{"title":"Influence of Coagulation–Filtration Processes on the Turbidity Dynamics of Natural Water","authors":"O. M. Rosenthal,&nbsp;A. G. Sambursky","doi":"10.1134/S004057952670065X","DOIUrl":"10.1134/S004057952670065X","url":null,"abstract":"<p>This study analyzes changes in the structural and dynamic properties of natural water during treatment for domestic and industrial use. Typical subhourly, daily, and longer multiday fluctuations in time series of turbidity, which characterizes the reduced transparency of natural water caused by suspended inorganic and organic matter of various origins, as well as those of conditioned water after coagulation and filtration, were studied. Possible cause-and-effect relationships persisting between the monitored parameters during water treatment were examined. The analysis revealed inheritance of such time-series properties as increased variability, quasi-cyclic behavior, structural shifts, volatility clustering, and long memory. The results improve the ability to assess changes in the empirical distribution functions of turbidity, predict its values for conditioned water, and reduce the volatility of the monitored parameters over a limited time interval.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"395 - 402"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oxidative–Extractive Desulfurization of Straight-Run Diesel Fraction Using the Ionic Liquid [BMIM][BF4] 离子液体[BMIM][BF4]氧化萃取法脱硫直馏柴油馏分
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700442
A. V. Fedorov, M. B. Glebov
{"title":"Oxidative–Extractive Desulfurization of Straight-Run Diesel Fraction Using the Ionic Liquid [BMIM][BF4]","authors":"A. V. Fedorov,&nbsp;M. B. Glebov","doi":"10.1134/S0040579526700442","DOIUrl":"10.1134/S0040579526700442","url":null,"abstract":"<p>The extraction of a pre-oxidized straight-run diesel fraction using the ionic liquid [BMIM][BF<sub>4</sub>] was studied. The preliminary oxidation step was carried out with hydrogen peroxide in the presence of molybdic acid. This treatment is required to convert sulfides into polar sulfoxides, thereby enabling their selective extraction with the ionic liquid [BMIM][BF<sub>4</sub>]. At a straight-run diesel fraction:ionic liquid volume ratio of 2 : 1 and 30°C, the sulfur content was reduced to &lt;0.05 wt %, corresponding to a sulfur removal efficiency of up to 96%. The effect of extraction duration on the efficiency of organic sulfur removal was also evaluated. The results demonstrate a reduction in the total sulfur content to a level meeting the IMO 2020 requirements (not more than 0.5 wt %).</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"280 - 282"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Deposition Rate of Chromium-Based Nanocomposite Coatings 铬基纳米复合涂层的沉积速率
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S004057952670048X
S. Yu. Zhachkin, A. I. Zavrazhnov, G. I. Trifonov
{"title":"Deposition Rate of Chromium-Based Nanocomposite Coatings","authors":"S. Yu. Zhachkin,&nbsp;A. I. Zavrazhnov,&nbsp;G. I. Trifonov","doi":"10.1134/S004057952670048X","DOIUrl":"10.1134/S004057952670048X","url":null,"abstract":"<p>The results of a study aimed at evaluating the effect of processing conditions on the deposition rate of chromium-based nanocomposite coatings are presented. Regression and correlation analyses were performed to develop a mathematical model describing the influence of the processing parameters on the deposition rate. The comprehensive study showed that optimization of the processing parameters allows the deposition rate of chromium-based nanocomposite coatings to reach 2.6–2.9 μm/min. This value is substantially higher than that achieved by conventional chromium plating methods, for which the maximum deposition rate usually does not exceed 0.8–0.9 μm/min. Thus, the observed 3–5-fold increase in the deposition rate demonstrates the high efficiency and promising potential of nanocomposite technologies in this field.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"295 - 299"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Using the DeepSeek Neural Network to Model the Formation of a Porous Surface Structure of Flat Basalt Fiber-Reinforced Polymer Composite Materials at the Initial Stage of Climatic Degradation 利用DeepSeek神经网络模拟平坦玄武岩纤维增强聚合物复合材料在气候退化初期多孔表面结构的形成
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700508
G. G. Vinokurov, N. F. Struchkov, A. K. Kychkin, M. P. Lebedev
{"title":"Using the DeepSeek Neural Network to Model the Formation of a Porous Surface Structure of Flat Basalt Fiber-Reinforced Polymer Composite Materials at the Initial Stage of Climatic Degradation","authors":"G. G. Vinokurov,&nbsp;N. F. Struchkov,&nbsp;A. K. Kychkin,&nbsp;M. P. Lebedev","doi":"10.1134/S0040579526700508","DOIUrl":"10.1134/S0040579526700508","url":null,"abstract":"<p>A statistical description of the formation of a porous structure on the external surface of flat basalt fiber-reinforced polymer composite materials during the initial stage of climatic degradation was developed using the DeepSeek neural network. The porous structure is represented by a two-dimensional cluster structure on a square lattice. In the statistical model based on the DeepSeek neural network, an increase in the probability of occupation of the square lattice corresponds to the duration of the initial stage of climatic degradation of basalt fiber-reinforced polymer composite materials.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"305 - 309"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Necessity of Selective Mining of Perlite Rock for Producing Homogeneous Perlite Raw Material 为生产均质珍珠岩原料，选择性开采珍珠岩的必要性
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-10-05 DOI: 10.1134/S0040579526700570
N. V. Gurgenyan, I. B. Khachanova, A. V. Martirosyan, A. E. Grigoryan, M. F. Kostandyan, D. N. Melkumyan
{"title":"Necessity of Selective Mining of Perlite Rock for Producing Homogeneous Perlite Raw Material","authors":"N. V. Gurgenyan,&nbsp;I. B. Khachanova,&nbsp;A. V. Martirosyan,&nbsp;A. E. Grigoryan,&nbsp;M. F. Kostandyan,&nbsp;D. N. Melkumyan","doi":"10.1134/S0040579526700570","DOIUrl":"10.1134/S0040579526700570","url":null,"abstract":"<p>The necessity of selective mining of perlite rock in thin extraction layers homogeneous in average density has been demonstrated to obtain homogeneous perlite raw material capable of ensuring stable and reproducible properties of expanded perlite and products manufactured from it. The relationship between the properties of the rock, expanded perlite, and products based on it confirms the need to replace conventional perlite mining by drilling, blasting, and excavation with a new selective mining approach. The classification of perlite raw material into narrow particle-size fractions specified by GOST 25226–96 also fails to ensure complete homogeneity of the feed supplied for expansion because of the presence of rock varieties with different densities within the deposit. It should be noted that the proportions of porous, slightly porous, and dense rock varieties vary from one mining area to another.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"340 - 344"},"PeriodicalIF":0.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ways to Improve the Electrochemical Properties of a Magnesium Anode in a Magnesium-Ion Battery 改善镁离子电池中镁阳极电化学性能的方法
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700041
A. A. Leonov, V. A. Duyunova, N. V. Trofimov, I. V. Mostyaev, E. A. Arkhipova, A. S. Ivanov
{"title":"Ways to Improve the Electrochemical Properties of a Magnesium Anode in a Magnesium-Ion Battery","authors":"A. A. Leonov,&nbsp;V. A. Duyunova,&nbsp;N. V. Trofimov,&nbsp;I. V. Mostyaev,&nbsp;E. A. Arkhipova,&nbsp;A. S. Ivanov","doi":"10.1134/S0040579526700041","DOIUrl":"10.1134/S0040579526700041","url":null,"abstract":"<p>Possible approaches to solving the problems of magnesium-ion batteries are analyzed from the standpoint of magnesium anodes, including their passivation, improvement of electrochemical properties, and system stability. Examples are considered that demonstrate the influence of alloying elements and fabrication methods on the mechanisms of thinning and self-delamination of the passivation film due to the structural and phase state and the formation of complex unstable hydroxides on the anode surface.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"19 - 27"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermogravimetric and Electron Microscopic Studies of a Ceramic Composition Based on Nonferrous Metallurgy Waste and Oil-Contaminated Soil 有色冶金废弃物与油渍土陶瓷复合材料的热重及电镜研究
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700144
V. Z. Abdrakhimov
{"title":"Thermogravimetric and Electron Microscopic Studies of a Ceramic Composition Based on Nonferrous Metallurgy Waste and Oil-Contaminated Soil","authors":"V. Z. Abdrakhimov","doi":"10.1134/S0040579526700144","DOIUrl":"10.1134/S0040579526700144","url":null,"abstract":"<p>Heating of the optimal composition based on industrial wastes without the use of natural traditional materials showed that the DTA, DTG, and TG curves do not contain unusual intense chemical reactions that would fundamentally differ from those observed when natural traditional raw materials are used. Thus, the studied wastes can replace natural traditional raw materials.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"79 - 86"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Temperature and Crystallization Atmosphere on the Equilibrium Phase Composition of Rhyolite Volcanic Rock 温度和结晶气氛对流纹岩火山岩平衡相组成的影响
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700193
S. V. Fomichev, V. A. Krenev, E. N. Pechenkina, E. I. Berbekova
{"title":"Influence of Temperature and Crystallization Atmosphere on the Equilibrium Phase Composition of Rhyolite Volcanic Rock","authors":"S. V. Fomichev,&nbsp;V. A. Krenev,&nbsp;E. N. Pechenkina,&nbsp;E. I. Berbekova","doi":"10.1134/S0040579526700193","DOIUrl":"10.1134/S0040579526700193","url":null,"abstract":"<p>Processes of melting and crystallization of the natural Si–Al–Ti–Fe–Mg–Ca–Na–K–O system were analyzed by computer physicochemical modeling using rhyolite as an example, with silica content in the range 63–78 wt % and the total content of sodium and potassium oxides in the range 3–8 wt %. The mineral composition of this rock during crystallization under various conditions was calculated based on chemical analysis data. Agreement of the obtained results with the Mineral Code of the Russian Federation is demonstrated.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"111 - 114"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Synthesis Conditions for Uranium-Containing Aluminum Oxides on the Phase Composition of Matrices Synthesized by Their Melting with Basalt 含铀铝氧化物合成条件对其与玄武岩熔融合成基体物相组成的影响
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700247
S. A. Kulyukhin, K. V. Martynov, V. V. Kulemin, G. V. Kostikova
{"title":"Effect of Synthesis Conditions for Uranium-Containing Aluminum Oxides on the Phase Composition of Matrices Synthesized by Their Melting with Basalt","authors":"S. A. Kulyukhin,&nbsp;K. V. Martynov,&nbsp;V. V. Kulemin,&nbsp;G. V. Kostikova","doi":"10.1134/S0040579526700247","DOIUrl":"10.1134/S0040579526700247","url":null,"abstract":"<p>In this paper, stonecast matrices (SCM) synthesized by melting together basalt and U-containing Al<sub>2</sub>O<sub>3</sub> were studied. The modification of Al<sub>2</sub>O<sub>3</sub> precursors containing 10 wt % of UO<sub>2</sub>(NO<sub>3</sub>)<sub>2</sub> was carried out by several methods: (1) the heating of a precursor in air for 5 h at temperatures of 573, 973, and 1273 K, (2) the treatment of a precursor with a solution of hydrazine hydrate (HH) (0.5 mol/L) for 2 h with drying to an air-dry state at 383 K for 5 h and further heating in air for 5 h at temperatures of 573, 973, and 1273 K, and (3) the treatment of a precursor with a solution of ammonia (2.9 mol/L) with further drying and heating as in the second method. It has been established that the melting of basalt with U-containing Al<sub>2</sub>O<sub>3</sub> results in SCM containing ulvospinel, spinel, anorthite, and basalt glass as main phases. Uranium is generally concentrated in the ulvospinel phase in intergrowths with uranium oxides. The value of uranium leaching into H<sub>2</sub>O from the synthesized SCM was estimated.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"140 - 152"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Deicing Properties of the Compound MgCl2⋅CO(NH2)2⋅4H2O 化合物MgCl2⋅CO(NH2)2⋅4H2O的除冰性能
IF 0.4 4区 工程技术
Theoretical Foundations of Chemical Engineering Pub Date : 2026-07-24 DOI: 10.1134/S0040579526700090
E. A. Frolova, G. E. Nikiforova, D. F. Kondakov
{"title":"Deicing Properties of the Compound MgCl2⋅CO(NH2)2⋅4H2O","authors":"E. A. Frolova,&nbsp;G. E. Nikiforova,&nbsp;D. F. Kondakov","doi":"10.1134/S0040579526700090","DOIUrl":"10.1134/S0040579526700090","url":null,"abstract":"<p>Phase equilibria in sections of the MgCl<sub>2</sub>–MgCl<sub>2</sub>⋅CO(NH<sub>2</sub>)<sub>2</sub>⋅4H<sub>2</sub>O–H<sub>2</sub>O system at temperatures from 0 to –37.5°C were studied, and a preliminary assessment of the feasibility of using the compound MgCl<sub>2</sub>⋅CO(NH<sub>2</sub>)<sub>2</sub>⋅4H<sub>2</sub>O for the development of deicing reagents based on it was given.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 1","pages":"46 - 49"},"PeriodicalIF":0.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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