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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">cvmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Цветная металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Non-Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3438</issn><issn pub-type="epub">2412-8783</issn><publisher><publisher-name>НИТУ "МИСИС"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0021-3438-2025-2-19-29</article-id><article-id custom-type="elpub" pub-id-type="custom">cvmet-1688</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Металлургия цветных металлов</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Metallurgy of Non-Ferrous Metals</subject></subj-group></article-categories><title-group><article-title>Спектроскопические исследования мембран МА-41П и МК-40 в процессе электромембранной очистки технологических растворов от ионов кобальта, меди и кадмия</article-title><trans-title-group xml:lang="en"><trans-title>Spectroscopic study of MA-41P and MK-40 membranes in electromembrane purification of process solutions containing cobalt, copper, and cadmium ions</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-9588-4897</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Долгова</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Dolgova</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ольга Валерьевна Долгова – к.т.н., ст. преподаватель кафедры «Природопользование и защита окружающей среды»</p><p>392000, г. Тамбов, ул. Советская, 106</p></bio><bio xml:lang="en"><p>Olga V. Dolgova – Cand. Sci. (Eng.), Senior Lecturer of the Department «Nature Management and Environmental Protection»</p><p>106 Sovetskaya Str., Tambov 392000</p></bio><email xlink:type="simple">o.v.dolgova@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3429-1139</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лазарев</surname><given-names>С. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Lazarev</surname><given-names>S. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Иванович Лазарев – д.т.н., профессор, зав. кафедрой «Механика и инженерная графика»</p><p>392000, г. Тамбов, ул. Советская, 106</p></bio><bio xml:lang="en"><p>Sergey I. Lazarev – Dr. Sci. (Eng.), Professor, Head of the Department «Mechanics and Engineering Graphics»</p><p>106 Sovetskaya Str., Tambov 392000</p></bio><email xlink:type="simple">sergey.lazarev.1962@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7540-5924</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Михайлин</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikhaylin</surname><given-names>M. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Максим Игоревич Михайлин – аспирант кафедры «Механика и инженерная графика»</p><p>392000, г. Тамбов, ул. Советская, 106</p></bio><bio xml:lang="en"><p>Maxim I. Mikhaylin – Postgraduate of the Department «Mechanics and Engineering Graphics»</p><p>106 Sovetskaya Str., Tambov 392000</p></bio><email xlink:type="simple">ckiburs@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тамбовский государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tambov State Technical University (TSTU)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>27</day><month>06</month><year>2025</year></pub-date><volume>0</volume><issue>2</issue><fpage>19</fpage><lpage>29</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Долгова О.В., Лазарев С.И., Михайлин М.И., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Долгова О.В., Лазарев С.И., Михайлин М.И.</copyright-holder><copyright-holder xml:lang="en">Dolgova O.V., Lazarev S.I., Mikhaylin M.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://cvmet.misis.ru/jour/article/view/1688">https://cvmet.misis.ru/jour/article/view/1688</self-uri><abstract><p>Получены ИК-спектры поверхностного слоя гетерогенных мембран: катионообменной МК-40 и анионообменной МА-41П, широко применяемых в электромембранных процессах. Спектры представлены для воздушно-сухого, статически и динамически водонасыщенного образцов мембран. Динамическое водонасыщение проводилось в процессе электродионизационной очистки раствора, содержащего ионы кобальта, меди и кадмия. Выявлено, что изменения в спектрах мембран, происходящие в результате водонасыщения, приводят к увеличению интенсивности и ширины полосы поглощения ν = 3000÷3700 см–1 в диапазоне валентных колебаний ОH–-групп. Появление дополнительного максимума при ν ~ 3287 см–1 обусловлено образованием более прочных водородных связей в поровом пространстве мембран. Отсутствие смещения полос поглощения, определяющих соединения, составляющие матрицу мембран в воздушно-сухом, статически и динамически водонасыщенных состояниях, указывает на их химическую стабильность. Установлены изменения интенсивности и частоты поглощения пиков в диапазоне ν ~1220÷1000 см–1, отвечающем за идентификацию функциональной группы анионита, для образца МА-41П после его использования в процессе электромембранной очистки. Наблюдаемые изменения в ИК-спектрах мембран оценивались на основании расчета приведенных пиковых интенсивностей полос поглощения. Установлено, что в мембранах МК-40 и МА-41П в динамически водонасыщенном состоянии уменьшается количество слабосвязанной «жидкой воды» и образуются более прочные водородные связи. Представлены результаты расчета оптической плотности характеристических полос поглощения полиэтилена, входящего в состав матрицы мембран. Показано изменение оптической плотности при водонасыщении, указывающее на конформационную перестройку в волокнах полиэтилена. Установлено количество химически не связанных компонентов разделяемого раствора, задерживающихся в объеме мембран и не оказывающих влияние на их эксплуатационные характеристики.</p></abstract><trans-abstract xml:lang="en"><p>Infrared (IR) spectra were obtained for the surface layer of heterogeneous membranes — cation-exchange MK-40 and anionexchange MA-41P — widely used in electromembrane processes. Spectra were recorded for air-dry, statically water-saturated, and operational (dynamically water-saturated) membrane samples. Dynamic water saturation was achieved during the electrodeionization purification of a solution containing cobalt, copper, and cadmium ions. Water saturation was found to increase the intensity and bandwidth of the absorption band at ν = 3000÷3700 cm–1, corresponding to the OH stretching vibration region. The appearance of an additional peak at ν ≈ 3287 cm–1 was attributed to the formation of stronger hydrogen bonds in the membrane pore space. The absence of shifts in the absorption bands corresponding to the membrane matrix components under air-dry, statically, and dynamically saturated conditions indicates their chemical stability. In the MA-41P membrane, after use in electrodeionization, changes were observed in both the intensity and position of absorption peaks in the ν  1220÷1000 cm–1 region, associated with the functional groups of the anion exchanger. The observed spectral changes were evaluated by calculating the normalized peak intensities of the absorption bands. It was shown that in the dynamically water-saturated state, both MK-40 and MA-41P membranes exhibit a reduction in the amount of weakly bound (“free”) water and the formation of stronger hydrogen bonds. The results of optical density calculations for characteristic polyethylene absorption bands — the main component of the membrane matrix — are presented. Changes in optical density upon water saturation indicate conformational rearrangements of polyethylene macromolecules. The amounts of chemically unbound solute components retained within the membrane volume were quantified; these species do not affect the membranes’ chemical stabiliy or operational performance.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>мембрана МК-40</kwd><kwd>МА-41П</kwd><kwd>ИК-спектр</kwd><kwd>водонасыщение</kwd><kwd>ионы металлов</kwd></kwd-group><kwd-group xml:lang="en"><kwd>MK-40 membrane</kwd><kwd>MA-41P membrane</kwd><kwd>IR spectrum</kwd><kwd>water saturation</kwd><kwd>metal ions</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания Министерства науки и высшего образования Российской Федерации, проект № FEMU-2024-0011.</funding-statement><funding-statement xml:lang="en">This study was carried out within the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation, project No. FEMU-2024-0011.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Shaoxiang Leeabc, Wenqiao Mengabc, Yupeng Wangd, Dong Wang, Meng Zhang, Guohui Wang, Jiaji Cheng, Yue Zhou, Wenjuan Qu. 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