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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">10.17073/0021-3438-2024-3-45-56</article-id><article-id custom-type="elpub" pub-id-type="custom">cvmet-1632</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 редких и благородных металлов</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Metallurgy of Rare and Precious Metals</subject></subj-group></article-categories><title-group><article-title>Разработка и решение уравнения кинетики и изотермы адсорбции золота из цианистых растворов на активированный уголь</article-title><trans-title-group xml:lang="en"><trans-title>Development and solution of the kinetics equation and adsorption isotherm for gold adsorption from cyanide solutions onto activated carbon</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0447-4831</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ёлшин</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Elshin</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виктор Владимирович Ёлшин – д.т.н., профессор кафедры автоматизации и управления</p><p>664074, г. Иркутск, ул. Лермонтова, 83</p></bio><bio xml:lang="en"><p>Viktor V. Elshin – Dr. Sci. (Eng.), Professor of the Department “Automation and Control”</p><p>83 Lermontov Str., Irkutsk 664074</p></bio><email xlink:type="simple">dean_zvf@istu.edu</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-0530-8015</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Миронов</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Mironov</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Петрович Миронов – к.т.н., доцент, науч. сотрудник кафедры автоматизации и управления</p><p>664074, г. Иркутск, ул. Лермонтова, 83</p></bio><bio xml:lang="en"><p>Alexander P. Mironov – Cand. Sci. (Eng.), Associate Professor of the Department “Automation and Control”</p><p>83 Lermontov Str., Irkutsk 664074</p></bio><email xlink:type="simple">mironoff.alexander@yandex.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/0009-0008-9781-1593</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лисицына</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Lisitsyna</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анастасия Андреевна Лисицына – ассистент кафедры автоматизации и управления</p><p>664074, г. Иркутск, ул. Лермонтова, 83</p></bio><bio xml:lang="en"><p>Anastasia A. Lisitsyna – Assistant Lecturer of the Department “Automation and Control”</p><p>83 Lermontov Str., Irkutsk 664074</p></bio><email xlink:type="simple">Gerasimovan19@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Иркутский национальный исследовательский технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Irkutsk National Research Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>03</day><month>10</month><year>2024</year></pub-date><volume>30</volume><issue>3</issue><fpage>45</fpage><lpage>56</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ёлшин В.В., Миронов А.П., Лисицына А.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Ёлшин В.В., Миронов А.П., Лисицына А.А.</copyright-holder><copyright-holder xml:lang="en">Elshin V.V., Mironov A.P., Lisitsyna A.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://cvmet.misis.ru/jour/article/view/1632">https://cvmet.misis.ru/jour/article/view/1632</self-uri><abstract><p>Представлены результаты теоретических и экспериментальных исследований процесса адсорбции золота из цианистых растворов на активированный уголь (АУ). Одной из задач работы было выявление функциональной зависимости между загрузкой массы АУ в объеме раствора адсорбционной колонны и кинетикой процесса. Для ее решения предложено модифицированное уравнение кинетики адсорбции (с учетом гетерогенности процесса) в виде включения твердой фазы угольного сорбента в единице объема раствора в качестве третьего промежуточного агента адсорбционного взаимодействия между ионами адсорбата и свободными активными центрами АУ. В результате получены модифицированное уравнение кинетики адсорбции золота на АУ 3-го порядка c учетом твердой фазы загрузки АУ в объеме раствора и его аналитические решения при условиях постоянства содержания золота в исходном растворе и проведения процесса в замкнутом объеме с изменяющейся концентрацией золота в растворе согласно уравнению материального баланса. Установлена взаимосвязь между решениями кинетического уравнения и уравнением изотермы адсорбции. Из решений кинетического уравнения получено модифицированное уравнение изотермы Ленгмюра, позволяющее находить равновесные концентрации золота на АУ и в растворе доопытно при условии проведения процесса в замкнутом объеме и известных начальных значениях содержаний золота в растворе и на АУ, а также при известной загрузке АУ в объеме адсорбера. Обсуждены теоретические зависимости констант скоростей адсорбции и десорбции от температуры, конвективных и диффузионных параметров. Представленная математическая модель кинетики адсорбции справедлива для условий проведения процесса адсорбции золота на АУ из золотоцианистых растворов при времени адсорбции до 2 суток и степени заполнения полной предельной емкости сорбента 40–60 %.</p></abstract><trans-abstract xml:lang="en"><p>This paper presents the results of theoretical and experimental studies on the process of gold adsorption from cyanide solutions onto activated carbon (AC). One of the objectives of the study was to identify the functional relationship between the mass loading of AC in the volume of the adsorption column solution and the kinetics of the process. To achieve this, a modified adsorption kinetics equation (considering the heterogeneity of the process) was proposed, which incorporates the solid phase of the carbon sorbent in the unit volume of solution as a third intermediate agent of adsorption interaction between the adsorbate ions and the free active sites of the AC. As a result, a modified third-order adsorption kinetics equation for gold adsorption on AC was derived, taking into account the solid phase loading of AC in the solution volume, along with its analytical solutions under conditions of constant gold content in the initial solution and the process conducted in a closed volume with varying gold concentrations in the solution according to the material balance equation. The relationship between the solutions of the kinetic equation and the adsorption isotherm equation was established. From the solutions of the kinetic equation, a modified Langmuir isotherm equation was derived, which allows determining the equilibrium concentrations of gold on the AC and in the solution a priori under the condition that the process is conducted in a closed volume, with known initial gold contents in the solution and on the AC, as well as with a known AC loading in the adsorber volume. The theoretical dependencies of the adsorption and desorption rate constants on temperature, convective, and diffusion parameters are discussed. The presented mathematical model of adsorption kinetics is valid under the conditions of gold adsorption on AC from gold cyanide solutions with an adsorption time of up to 2 days and a sorbent capacity utilization degree of 40–60%.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>золото</kwd><kwd>кинетика</kwd><kwd>адсорбция</kwd><kwd>угольный адсорбент</kwd><kwd>изотерма адсорбции</kwd><kwd>цианистый раствор</kwd><kwd>константа скорости реакции</kwd><kwd>математическое моделирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gold</kwd><kwd>kinetics</kwd><kwd>adsorption</kwd><kwd>carbon adsorbent</kwd><kwd>adsorption isotherm</kwd><kwd>cyanide solution</kwd><kwd>reaction rate constant</kwd><kwd>mathematical modeling</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы благодарят сотрудников лаборатории № 15 АО «Иргиредмет» (г. Иркутск) за предоставленные экспериментальные данные по кинетике адсорбции золота на активированный уголь и за содействие в проведении анализов.</funding-statement><funding-statement xml:lang="en">The authors express their gratitude to the staff of Laboratory No. 15 of “Irgiredmet” OJSC for providing experimental data on the kinetics of gold adsorption onto activated carbon and for assisting with the analyses.</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">Nicol M. J., Fleming C. A., Cromberge G. The absorption of gold cyanide onto activated carbon. I. The kinetics of absorption from pulps. Journal of the Southern African Institute of Mining and Metallurgy. 1984; 84 (2):50—54.</mixed-citation><mixed-citation xml:lang="en">Nicol M. J., Fleming C. A., Cromberge G. The absorption of gold cyanide onto activated carbon. I. 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