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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Дубинина, Ирина Александровна, Исакова, Виктория Гавриловна, Чурилов, Григорий Николаевич
Заглавие : Извлечение платиновых металов из технологических растворов аффинажного производства
Коллективы : Национальная Академия наук Украины, Российская академия наук, Национальная Академия наук Беларуси, Украинское материаловедческое общество, Институт проблем материаловедения им. И.Н. Францевича НАН Украины, Институт высоких температур РАН, Московский государственный технический университет им. Н.Э. Баумана, Институт тепло- и массообмена им. А.В. Лыкова НАН Беларуси, ИНТЕМ, ООО, "Материалы и покрытия в экстремальных условиях: исследования, применение, экологически чистые технологии производства и утилизации изделий", международная конференция (8; 22-26 сент. 2014 г.; Киев), "Materials and Coatings for Extreme Performances: Investigations, Applications, Ecologically Safe Technologies for Their Production and Utilization", International Conference (8; 22-26 Sept. 2014; Kiev, Ukraine)
Место публикации : Восьмая междунар. конф. "Матер. и покрытия в экстрем. условиях: исслед., прим., экологически чистые технол. произв-ва и утилизации изделий": Тез. конф. - 2014. - P.157
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Михайлов, Михаил Иванович, Сорокин, Анатолий Васильевич, Фомин, Сергей Викторович, Музалевский, Константин Викторович
Заглавие : Восстановление влажности древесины лесного полога с использованием сигналов навигационных спутников
Коллективы : "Решетневские чтения", международная научно-практическая конференция
Место публикации : Решетневские чтения: материалы XIX Междунар. науч. конф. : в 2-х ч... - Красноярск: Сибирский государственный аэрокосмический университет им. акад. М. Ф. Решетнева, 2015. - Ч. 1. - С. 308-310. - ISSN 1990-7702
Примечания : Библиогр.: 5. - Работа выполнена на базе Красноярского регионального центра коллективного пользования СО РАН в рамках программы фундаментальных исследований «Радиофизические методы диагностики окружающей среды» по теме «Изучение процессов поглощения и рассеяния электромагнитных волн СВЧ-диапазона лесными покровами Сибири».
Ключевые слова (''Своб.индексиров.''): влажность древесины--лесной полог--сигналы навигационных спутников--коэффициент затухания--moisture wood--forest canopy--signals of navigating satellites--attenuation coefficient
Аннотация: Представлены экспериментальные данные для коэффициента ослабления сигналов навигационных спутников ГЛОНАСС и GPS в лесном пологе и оценка возможности их использования для восстановления влажности древесины.The paper treats experimental data for the attenuation coefficient of signals from navigation satellites GLONASS and GPS in the forest canopy, and estimation the possibility of their use for determination of moisture wood.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yakubailik E. K., Balaev A. D., Ganzhenko I. M.
Заглавие : Evaluation of additional iron recovery from iron ore tailings
Место публикации : J. Min. Sci. - 2017. - Vol. 53, Is. 3. - P.559-564. - ISSN 10627391 (ISSN), DOI 10.1134/S1062739117032511
Примечания : Cited References: 12
Ключевые слова (''Своб.индексиров.''): tailings--dry centrifugal separation--wet separation--magnetic characteristics--neodymium–ferrum–boron
Аннотация: The article demonstrates feasibility of additional iron recovery from the secondary kind of mineral raw materials—dry magnetic separation tailings obtained at crushing and processing factories of Abaza and Irba and wet magnetic separation tailing produced at Abagur processing plant of Evrazruda. Dry centrifugal separation treatment of Abaza tailings–3 mm in size allowed 6.3% of middlings with Fetotal and Femag contents of 40.4 and 32%, respectively; the result of dry magnetic separation of Irba tailings -5 mm in size is 7.7% middlings with the content of Fetotal and Femag 39.9 and 30.8%. Wet magnetic separation of Abagur tailings -0.007 mm in size allowed recovery of 0.6 to 1.45% of magnetic fraction with Fetotal content of 53.3 and 51.6%, respectively, and Femag content of 49.8 and 48.5%. Fitting of modern separators with the magnetic systems based on neodymium–ferrum–boron considerably improves output of the machines (in dry centrifugal separation circuit) and enhances the yield of magnetic product in wet separation of tailings.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kononova O. N., Duba E. V., Medovikov D. V., Krylov A. S.
Заглавие : Ion-exchange sorption of palladium(II) from hydrochloric acid solutions in the presence of silver(I)
Место публикации : Russ. J. Phys. Chem. A. - 2018. - Vol. 92, Is. 10. - P.2053-2059. - ISSN 0036-0244, DOI 10.1134/S0036024418100138. - ISSN 1531-863X(eISSN)
Примечания : Cited References: 36
Предметные рубрики: PLATINUM-GROUP METALS
RECOVERY
COMPLEXES
CHLORIDE
PD(II)
Ключевые слова (''Своб.индексиров.''): palladium--silver--hydrochloric acid solutions--sorption--sorptive extraction
Аннотация: The sorptive extraction of palladium(II) chloride complexes in the presence of silver(I) chloride complexes from 2 and 4 M aqueous solutions of HCl with a series of Purolite anionites with different functional groups is studied. An anion exchange mechanism of sorption is identified from Raman spectroscopy data. Kinetic properties that are inherent to the investigated ionites and allow the elution of palladium(II) and silver(I) after their extraction in a dynamic mode are revealed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kononova O. N., Duba E. V., Efimova A. S., Ivanov A. I., Krylov A. S.
Заглавие : Ion exchange recovery of platinum(IV) from hydrochloric acid solutions in the presence of silver(I)
Место публикации : Russ. J. Phys. Chem. A. - 2020. - Vol. 94, Is. 4. - P.828-834. - ISSN 0036-0244, DOI 10.1134/S003602442004007X. - ISSN 1531-863X(eISSN)
Примечания : Cited References: 35
Предметные рубрики: GROUP METALS
SORPTION
PALLADIUM
RESINS
Аннотация: The ion exchange sorption of the platinum(IV) chloride complexes in the presence of silver(I) chloro complexes from 2 and 4 M aqueous solutions of hydrochloric acid is studied on Purolite anion exchangers with different functional groups. The high selectivity of the investigated sorbents with respect to platinum during its recovery from individual hydrochloric acid solutions and in the presence of silver chloride complexes is determined. Since the latter are in this case virtually not sorbed in the presence of platinum(IV), they can be separated at the stage of sorption. The excellent kinetic properties of the investigated anion exchangers are revealed, allowing platinum to be eluted after its separation from silver chloro complexes in a dynamic mode.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kononova O.N., Melnikov A.M., Borisova T.V., Krylov A. S.
Заглавие : Simultaneous ion exchange recovery of platinum and rhodium from chloride solutions
Место публикации : Hydrometallurgy. - 2011. - Vol. 105, Is. 3-4. - P.341-349. - JAN. - ISSN 0304-386X, DOI 10.1016/j.hydromet.2010.11.009
Примечания : Cited Reference Count: 46
Предметные рубрики: GROUP-METALS PGM
SEPARATION
CATALYST
ANION
ADSORPTION
EXTRACTION
CHEMISTRY
RESIN
Ключевые слова (''Своб.индексиров.''): platinum--rhodium--sorption--anion exchangers--chloride solutions--anion exchangers--chloride solutions--platinum--rhodium--sorption--ammonium thiocyanate--anion exchangers--basic parameters--chemical structure--chloride solutions--diffusion coefficients--distribution coefficient--exchange capacities--kinetic properties--noble metals--purolite--rhodium chloride--separation factors--sorption ability--work focus--ammonium compounds--chlorine compounds--desorption--hydrochloric acid--ion exchange--ion exchange resins--ions--platinum--platinum compounds--potassium hydroxide--precious metals--recovery--rhodium--sulfuric acid--thioureas--urea--rhodium compounds
Аннотация: This work focuses on the sorption recovery of platinum (II, IV) and rhodium (III) simultaneously present in chloride solutions, freshly prepared and stored over 3 months, on commercial anion exchangers with different physical and chemical structure. The sorption was carried out from solutions with 0.001-4.0 mol/L HCl. The initial platinum and rhodium concentrations in contacting solutions were 0.25-2.5 mmol/L Sorption and kinetic properties of the chosen anion exchangers were investigated and the basic parameters of exchange capacity, recovery, distribution coefficients, separation factors, process rate, diffusion coefficients and half-exchange times were calculated. It is shown that anion exchangers investigated possess high sorption ability to platinum and rhodium chloride complexes, which does not deteriorate in case of stored solutions. Desorption of platinum and rhodium from the resins investigated was carried out with hydrochloric acid (2 mol/L), thiourea (1 mol/L) in sulfuric acid (2 mol/L) or in potassium hydroxide (2 mol/L) as well as by ammonium thiocyanate (2 mol/L). It was shown that complete separation of platinum and rhodium can be carried out with 2 mol/L HCl on anion exchanger Purolite S 985, whereas 2 mol/L NH(4)SCN as an elution agent leads to complete separation of noble metals on anion exchangers Purolite S 985, Purolite A 500 and AM-2B. (C) 2010 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pryazhnikov M. I., Zhigarev V. A., Minakov A. V., Nemtsev I. V.
Заглавие : Spontaneous imbibition experiments for enhanced oil recovery with silica nanosols
Колич.характеристики :14 с
Место публикации : Capillarity. - 2024. - Vol. 10, Is. 3. - P.73-86. - ISSN 27092119 (ISSN), DOI 10.46690/capi.2024.03.02. - ISSN 26523310 (eISSN)
Примечания : Cited References: 53. - This work is partially financed by Ministry of Science and Higher Education of the Russian Federation (No. FSRZ2020-0012)
Аннотация: Experimental oil displacement as a result of spontaneous imbibition of silica nanosols has been carried out using two types of sandstone as the reservoir rock. The permeability of the cores ranged from 0.34 to 333 mD, while the porosity was 11% and 22%, respectively. During the research, the influence of the concentration and nanoparticle size, as well as the permeability of the rock, on the process of spontaneous imbibition, was studied. Silica nanosols were considered as an object of study. The nanoparticle size ranged from 10 to 35 nm. The mass concentration of nanoparticles varied from 0.01% to 0.25%. It was found that the use of silica nanosols significantly increases the rate of the spontaneous imbibition process. It was established that a silica nanosol with a nanoparticle size of 10 nm and a concentration of 0.25% allows to displace more than six times oil compared to the reservoir water model in the same time. As a result, it was shown that the oil displacement efficiency and the efficiency of spontaneous imbibition increase along with an increase in the nanoparticle concentration and a decrease in the nanoparticle size.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Knyazev Yu. V., Platunov M. S., Ikkert O. P., Semenov S. V., Bayukov O. A., Nikolenko A. D., Nazmov V. P., Volochaev M. N., Dubrovskiy A. A., Molokeev M. S., Smorodina E. D., Balaev D. A., Karnachuk O. V.
Заглавие : Microbially mediated synthesis of vivianite by Desulfosporosinus on the way to phosphorus recovery
Колич.характеристики :15 с
Место публикации : Environ. Sci.: Adv. - 2024. - Vol. 3, Is. 6. - P.897-911. - ISSN 27547000 (eISSN), DOI 10.1039/D4VA00040D
Примечания : Cited References: 120. - This study was supported by the Russian Science Foundation, project no. 22-24-00601 (https://rscf.ru/project/22-24-00601/). The electron microscopy and Mössbauer studies were carried out on the equipment of the Krasnoyarsk Territorial Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences. The research contribution of M. S. P. was partially supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental assignment for Synchrotron radiation facility “SKIF”, Boreskov Institute of Catalysis (project FWUR-2024-0040)
Аннотация: We explored the role of biomineralization in industrial waste sludge formation, using the laboratory cultivation of Desulfovibrio sp. OL sulfate reducing species isolated from the Komsomolsky waste sludge (Russia). The most frequently reported sulfate-reducing bacteria (SRB) biomineralization products are various iron sulfides. Here we present first studies of the products of Desulfosporosinus metallidurans, acidophilic SRB from acid mine drainage. We analyzed the biomineralized sample using X-ray diffraction, electron microscopy, X-ray absorption and Mossbauer spectroscopies, and magnetization measurements via First-Order Reversal Curve (FORC) diagram analysis. Our findings show that the biomineralization occurring under pure culture conditions leads to the formation of greigite (Fe3S4) nanorods, along with larger microbially mediated crystals of vivianite (Fe3(PO4)2·8H2O) and siderite (FeCO3). Energy dispersive X-ray spectroscopy revealed that the crystal sizes of vivianite and siderite were comparatively larger than those of the nanorod-shaped greigite. Transmission electron microscopy and Mossbauer spectroscopy detected ultrafine ferrihydrite (Fe2O3·nH2O) superparamagnetic nanoparticles with an average size of 2.5 nm. FORC analysis showed significant magnetic interactions among these nanoparticles, suggesting their potential for magnetic separation applications. The current study demonstrates that ferrihydrite nanoparticles have a strong magnetic affinity for other crystal phases produced by Desulfosporosinus metallidurans. Therefore, we believe that the investigated bacterial species can be exploited in advanced magnetic separation techniques. This offers a cost-effective and environmentally friendly method for purifying sediments in industrial waste sludge.
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