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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">10.29235/1561-8331-2020-56-1-24-32</article-id><article-id custom-type="elpub" pub-id-type="custom">vestich-562</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>Формы нахождения радионуклида кобальта-60 в растворах борной кислоты</article-title><trans-title-group xml:lang="en"><trans-title>Сobalt-60 radionuclide speciation in boric acid solutions</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>Зарубо</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Zarubo</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зарубо Александр Михайлович – научный сотрудник</p><p>223063, д. Прилесье, Луговослободской с/с, 47/22, Минский р-н, Минская обл.</p></bio><bio xml:lang="en"><p>Alexander M. Zarubo – Researcher </p><p>47/22, Prilesye district, Lugovaya Sloboda village council, Minsk district, 223063, Minsk region</p></bio><email xlink:type="simple">aliaksandr.zaruba@sosny.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>Радкевич</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Radkevich</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Радкевич Артем Валерьянович – научный сотрудник</p><p>223063, д. Прилесье, Луговослободской с/с, 47/22, Минский р-н, Минская обл.</p></bio><bio xml:lang="en"><p>Artem V. Radkevich – Researcher</p><p>47/22, Prilesye district, Lugovaya Sloboda village council, Minsk district, 223063, Minsk region</p></bio><email xlink:type="simple">radkevich@sosny.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>Коренькова</surname><given-names>О. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Korenkova</surname><given-names>O. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Коренькова Ольга Борисовна – младший научный сотрудник</p><p>223063, д. Прилесье, Луговослободской с/с, 47/22, Минский р-н, Минская обл.</p></bio><bio xml:lang="en"><p>Olga B. Korenkova – Junior Researcher</p><p>47/22, Prilesye district, Lugovaya Sloboda village council, Minsk district, 223063, Minsk region</p></bio><email xlink:type="simple">korenkova@sosny.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>Вороник</surname><given-names>Н. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Voronik</surname><given-names>N. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вороник Надежда Ивановна – вед. научный сотрудник</p><p>223063, д. Прилесье, Луговослободской с/с, 47/22, Минский р-н, Минская обл.</p></bio><bio xml:lang="en"><p>Nadzey I. Voronic – Leading Researcher</p><p>47/22, Prilesye district, Lugovaya Sloboda village council, Minsk district, 223063, Minsk region</p></bio><email xlink:type="simple">ireplab06@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Объединенный институт энергетических и ядерных исследований – Сосны Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Science institution «The Joint Institute of Power and Nuclear Research –Sosny» National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>18</day><month>03</month><year>2020</year></pub-date><volume>56</volume><issue>1</issue><fpage>24</fpage><lpage>32</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Зарубо А.М., Радкевич А.В., Коренькова О.Б., Вороник Н.И., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Зарубо А.М., Радкевич А.В., Коренькова О.Б., Вороник Н.И.</copyright-holder><copyright-holder xml:lang="en">Zarubo A.M., Radkevich A.V., Korenkova O.B., Voronik N.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://vestichem.belnauka.by/jour/article/view/562">https://vestichem.belnauka.by/jour/article/view/562</self-uri><abstract><p>Исследовано состояние радионуклида 60Co в модельных растворах теплоносителя бассейна выдержки отработавшего ядерного топлива с использованием методов ультрафильтрации и центрифугирования. Показано влияние pH и состава раствора на формы нахождения радионуклида 60Co, установлены границы существования ионных и неионных (псевдоколлоидных) форм. В растворах борной кислоты 20 г/л при рН 4–8 большая часть 60Co находится в ионном состоянии в виде гидратированного катиона Co2+. Размер неионных форм кобальта в данном интервале рН составляет 1–50 нм. Начиная с рН 8 доля неионных форм резко увеличивается и достигает 100 % при рН 10–11, что связано с образованием ионов CoOH+ и их повышенной сорбционной активностью при образовании псевдоколлоидов. Внесение в раствор ионов железа (III), являющихся предшественниками продуктов коррозии, сдвигает образование неионных форм 60Co в более низкую область pH.</p></abstract><trans-abstract xml:lang="en"><p>In this work, the speciation of 60Co radionuclide in model solution of spent fuel pool coolant is studied by ultrafiltration and centrifugation. The effect of pH and composition of the solution on the 60Co radionuclide speciation is shown; the limitss in existence of ionic and non-ionic (pseudocolloidal) forms are defined. A great part of 60Co states at ionic form represented by hydrated cation of 60Co in the solutions of boric acid 20 g/L at 4–8 pH value. The size of non-ionic forms of 60Co in this pH range is 1–50 nm. Starting with pH 8, the соntent of non-ionic forms increases dramatically and reaches 100 % at pH value 10–11, which is due to formation of CoOH+ ions and their increased sorption activity at forming pseudocolloids. Introduction of iron (III) ions to the solution, which are precursors of corrosion products, shifts the formation of nonionic forms of 60Co to lower pH area.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>состояние радионуклидов в растворе</kwd><kwd>60Co</kwd><kwd>бассейн выдержи отработавшего ядерного топлива</kwd><kwd>ультрафильтрация</kwd><kwd>центрифугирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>radionuclides speciation in solution</kwd><kwd>ultrafiltration</kwd><kwd>centrifugation</kwd><kwd>60Co</kwd><kwd>spent fuel pool</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Национальной академии наук Беларуси (грант на выполнение научно-исследовательской работы докторантами, аспирантами и соискателями НАН Беларуси, договор № 2017-26-008 от 03.04.2017).</funding-statement><funding-statement xml:lang="en">This work has been performed with the financial support of the National Academy of Sciences of Belarus (grant for scientific research by doctoral students, postgraduates and applicants of the National Academy of Sciences of Belarus, agreement No. 2017-26-008 of 03/04/2017).</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">Decommissioning of pools in nuclear facilities NES No. NW-T-2.6. – Vienna : IAEA, 2015. – 200 p.</mixed-citation><mixed-citation xml:lang="en">Decommissioning of pools in nuclear facilities NES No. NW-T-2.6. 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