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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">plasticnews</journal-id><journal-title-group><journal-title xml:lang="ru">Пластические массы</journal-title><trans-title-group xml:lang="en"><trans-title>Plasticheskie massy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0554-2901</issn><publisher><publisher-name>PLASTMASSY Publishing House (Moscow)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.35164/0554-2901-2023-7-8-47-52</article-id><article-id custom-type="elpub" pub-id-type="custom">plasticnews-902</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>ЭКОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ECOLOGY</subject></subj-group></article-categories><title-group><article-title>Сорбция ионов меди (II) композиционным сорбентом на основе хитозана и монтмориллонита</article-title><trans-title-group xml:lang="en"><trans-title>Sorption of copper (II) ions by a composite sorbent based on chitosan and montmorillonite</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>Никифорова</surname><given-names>Т. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikiforova</surname><given-names>T. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Иваново</p></bio><bio xml:lang="en"><p>Ivanovo</p></bio><email xlink:type="simple">tatianaenik@mail.ru</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>Габрин</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gabrin</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Иваново</p></bio><bio xml:lang="en"><p>Ivanovo</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Козлов</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozlov</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Иваново</p></bio><bio xml:lang="en"><p>Ivanovo</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Ивановский государственный химико-технологический университет»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ivanovo State University of Chemistry and Technology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>06</day><month>10</month><year>2023</year></pub-date><volume>1</volume><issue>7-8</issue><fpage>47</fpage><lpage>52</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Никифорова Т.Е., Габрин В.А., Козлов В.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Никифорова Т.Е., Габрин В.А., Козлов В.А.</copyright-holder><copyright-holder xml:lang="en">Nikiforova T.E., Gabrin V.A., Kozlov V.A.</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://www.plastics-news.ru/jour/article/view/902">https://www.plastics-news.ru/jour/article/view/902</self-uri><abstract><p>Разработан композиционный сорбент на основе хитозана и монтмориллонита для извлечения ионов тяжелых металлов из водных растворов. Определено оптимальное соотношение хитозан/монтмориллонит для получения гранул сорбента.</p><p>Проведены равновесно-кинетические исследования процесса извлечения ионов меди (II) в гетерофазной системе «водный раствор сульфата металла – модифицированный сорбент».</p><p>Обработка изотерм сорбции ионов меди (II) исходным хитозаном и композитом на его основе по уравнению Ленгмюра позволила определить максимальные сорбционные емкости этих материалов (А∞). Установлено, что А∞ композиционного сорбента хитозан/монтмориллонит превышает максимальную сорбционную емкость для исходного хитозана более, чем в два раза.</p><p>Влияние рН на процесс сорбции ионов меди сорбентами на основе хитозана обусловлено конкуренцией катионов металла и протонов за центры сорбции. В ходе конкурентной хемосорбции протоны дезактивируют аминогруппы - основные центры сорбции, переводя их в неактивную, Н-солевую форму, что приводит к снижению сорбционной емкости хитозана по отношению к ионам меди.</p><p>Изменения в составе модифицированного сорбента по сравнению с исходным хитозаном подтверждаются данными инфракрасной спектроскопии. Микроскопические исследования по методу сканирующей электронной микроскопии показывают наличие изменений поверхностной структуры хитозановых гранул при введении в состав композита монтмориллонита.</p></abstract><trans-abstract xml:lang="en"><p>A composite sorbent based on chitosan and montmorillonite has been developed for the extraction of heavy metal ions from aqueous solutions. The optimal chitosan / montmorillonite ratio for obtaining sorbent granules has been determined. Equilibriumkinetic studies of the process of copper (II) ions extraction in the heterophase system "aqueous solution of metal sulphate - modified sorbent" have been carried out.</p><p>The treatment of sorption isotherms of copper (II) ions by the initial chitosan and a chitosan based composite according to the Langmuir equation made it possible to determine the maximum sorption capacities of these materials (А∞). It has been established that A∞ of the chitosan/montmorillonite composite sorbent exceeds the maximum sorption capacity for the original chitosan by more than two times.</p><p>The effect of pH on the sorption of copper ions by chitosan-based sorbents is due to the competition of metal cations and protons for sorption sites. In the course of competitive chemisorption, protons deactivate amino groups - the main sorption centers, converting them into an inactive, H-salt form, which leads to a decrease in the sorption capacity of chitosan in relation to copper ions.</p><p>Changes in the composition of the modified sorbent compared to the original chitosan are confirmed by infrared spectroscopy data. Microscopic studies using the method of scanning electron microscopy show the presence of changes in the surface structure of chitosan granules when montmorillonite is introduced into the composition of the sorbent.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>хитозан</kwd><kwd>монтмориллонит</kwd><kwd>сорбция</kwd><kwd>ионы меди (II)</kwd><kwd>композиционный сорбент</kwd></kwd-group><kwd-group xml:lang="en"><kwd>chitosan</kwd><kwd>montmorillonite</kwd><kwd>sorption</kwd><kwd>copper (II) ions</kwd><kwd>composite sorbent</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">Sáez P., Dinu I.A., Rodríguez A., Gómez J.M., Lazar M.M., Rossini D., Dinu M.V. 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