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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">vestich</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия химических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Chemical Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8331</issn><issn pub-type="epub">2524-2342</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8331-2021-57-2-263-269</article-id><article-id custom-type="elpub" pub-id-type="custom">vestich-661</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>ФИЗИЧЕСКАЯ ХИМИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICAL CHEMISTRY</subject></subj-group></article-categories><title-group><article-title>Титрование хелатообразующего волокнистого сорбента в присутствии комплексообразующих двухвалентных катионов</article-title><trans-title-group xml:lang="en"><trans-title>Titration of chelating fibrous sorbent in the presence of complex-forming divalent cations</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Солдатов</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Soldatov</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Солдатов Владимир Сергеевич – академик, д-р хим. наук, профессор, гл. науч. сотрудник</p><p>ул. Сурганова, 13, 220072, Минск </p></bio><bio xml:lang="en"><p>Vladimir S. Soldatov – Academician, D. Sc. (Chemistry), Professor, Chief Researcher</p><p>13, Surganov Str., 220072, Minsk </p></bio><email xlink:type="simple">soldatov@ifoch.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коршунова</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Korshunova</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Коршунова Татьяна Александровна – канд. хим. наук, ст. науч. сотрудник</p><p>ул. Сурганова, 13, 220072, Минск</p></bio><bio xml:lang="en"><p>Tatyana A. Korshunova – Ph. D. (Chemistry), Senior Researcher</p><p>13, Surganov Str., 220072, Minsk </p></bio><email xlink:type="simple">2019Korshunova@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Косандрович</surname><given-names>Е. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Kosandrovich</surname><given-names>E. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Косандрович Евгений Генрихович – канд. хим. наук, доцент, зав. лаб. </p><p>ул. Сурганова, 13, 220072, Минск</p></bio><bio xml:lang="en"><p>Evgenii G. Kоsandrovich – Ph. D. (Chemistry), Associate Professor, Head of the Laboratory</p><p>13, Surganov Str., 220072, Minsk </p></bio><email xlink:type="simple">kosandrovich@ifoch.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нестеронок</surname><given-names>П. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nesteronok</surname><given-names>P. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нестеронок Петр Викторович – канд. хим. наук, ст. науч. сотрудник</p><p>ул. Сурганова, 13, 220072, Минск</p></bio><bio xml:lang="en"><p>Petr V. Nesteronok - Ph. D. (Chemistry), Senior Researcher</p><p>13, Surganov Str., 220072, Minsk </p></bio><email xlink:type="simple">petr.nester@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физико-органической химии Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>03</day><month>09</month><year>2021</year></pub-date><volume>57</volume><issue>3</issue><fpage>263</fpage><lpage>269</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Солдатов В.С., Коршунова Т.А., Косандрович Е.Г., Нестеронок П.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Солдатов В.С., Коршунова Т.А., Косандрович Е.Г., Нестеронок П.В.</copyright-holder><copyright-holder xml:lang="en">Soldatov V.S., Korshunova T.A., Kosandrovich E.G., Nesteronok P.V.</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://vestichem.belnauka.by/jour/article/view/661">https://vestichem.belnauka.by/jour/article/view/661</self-uri><abstract><p>Получены кривые титрования Н-форм волокнистого хелатного сорбента с иминодиацетатными группами на основе промышленного полиакрилонитрильного волокна Нитрон гидроксидом калия в 1М растворе KСl в присутствии хлоридов Ni2+, Со2+, Сu2+ и Ca2+. Использованный метод позволял одновременное измерение рН раствора и концентрации двухвалентного катиона в каждой точке кривой титрования. Из этих данных были рассчитаны зависимости величин их сорбции от рН равновесного раствора. Кривые прямого и обратного титрования во всех случаях практически совпадали. По мере изменения рН при титровании наблюдалось выпадение осадков соответствующих гидроксидов. При этом возрастание рН приостанавливалось или сильно замедлялось при добавлении щелочи в ячейку для титрования. Образование осадка происходило преимущественно в растворе для Со2+ и Ni2+ (pH 8), когда ионит был насыщен металлическим ионом. В случае Сu2+ (рН образования осадка 4) сорбция Cu2+ происходит и при более низких, и при более высоких рН за счет ионизации карбоксильных групп и частичного растворения осадка. Во всех случаях максимальная сорбция Ni2+, Со2+, Сu2+, Ca2+ соответствовала образованию сорбционных комплексов типа R–N(CH2COO–)2 Me2+.</p></abstract><trans-abstract xml:lang="en"><p>Titration curves of H-forms of the fibrous chelating sorbent with iminodiacetic groups based on industrial polyacrylonitrile fiber Nitron with potassium hydroxide in 1M KCl solution in the presence of Ni2+, Co2+, Cu2+ and Ca2+ chlorides were obtained. The method used made it possible to simultaneously measure the pH of the solution and the concentration of the divalent cation at each point of the titration curve. From these data, the dependences of their sorption values on the pH of the equilibrium solution were calculated. The curves of direct and back titration practically coincided in all cases. As the pH changed during titration, precipitation was observed at pH values of precipitation of the corresponding hydroxides. In this case, the increase in pH was suspended or greatly slowed down by adding alkali to the titration cell. The formation of a precipitate occurred mainly in a solution for Co2+ and Ni2+ (pH 8), when the ion exchanger was saturated with a metal ion. In the case of Cu2+ (precipitate formation pH 4), Cu2+ sorption occurs at both lower and higher pH due to ionization of carboxyl groups and partial dissolution of the precipitate. In all cases, the maximum sorption of Ni2+, Co2+, Cu2+, Ca2+ corresponded to the formation of sorption complexes of the R–N(CH2COO-)2Me2+ type.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>хелатные сорбенты</kwd><kwd>иминодиацетатные группы</kwd><kwd>сорбция</kwd><kwd>ионы переходных металлов</kwd><kwd>комплексообразование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>chelating sorbents</kwd><kwd>iminodiacetic groups</kwd><kwd>sorption</kwd><kwd>transition metal ions</kwd><kwd>complexation</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Херинг, Р. Хелатообразующие ионообменники / Р. Херинг. – М.: Мир, 1971. – 280 с.</mixed-citation><mixed-citation xml:lang="en">Hering P. Chelating ion exchangers. Moscow, Mir Publ, 1971. 280 p. 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