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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">nuc</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник НЯЦ РК</journal-title><trans-title-group xml:lang="en"><trans-title>NNC RK Bulletin</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1729-7516</issn><issn pub-type="epub">1729-7885</issn><publisher><publisher-name>Национальный ядерный центр Республики Казахстан</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52676/1729-7885-2022-3-69-74</article-id><article-id custom-type="elpub" pub-id-type="custom">nuc-434</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>Статьи</subject></subj-group></article-categories><title-group><article-title>ХАРАКТЕРИЗАЦИЯ НАНОКОМПОЗИТНЫХ ЦЕОЛИТОВ ДЛЯ УДАЛЕНИЯ РТУТИ ИЗ ВОДЫ, ПОЛУЧЕННЫХ МЕТОДОМ ФЬЮЖН</article-title><trans-title-group xml:lang="en"><trans-title>CHARACTERIZATION OF NANOCOMPOSITE ZEOLITES FOR MERCURY REMOVAL FROM WATER PRODUCED BY THE FUSION METHOD</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2632-2481</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сатаева</surname><given-names>А.</given-names></name><name name-style="western" xml:lang="en"><surname>Satayeva</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p><p>Нур-Султан</p></bio><bio xml:lang="en"><p>Almaty</p><p>Nur-Sultan</p></bio><email xlink:type="simple">aliya.satayeva@nu.edu.kz</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>Тауанов</surname><given-names>Ж.</given-names></name><name name-style="western" xml:lang="en"><surname>Tauanov</surname><given-names>Zh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">zhtauanov@alumni.nu.edu.kz</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жантикеев</surname><given-names>У.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhantikeev</surname><given-names>U.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">nurlybekov_ulan@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Байменов</surname><given-names>А.</given-names></name><name name-style="western" xml:lang="en"><surname>Baimenov</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">alzhan.baimenov@nu.edu.kz</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Азат</surname><given-names>С.</given-names></name><name name-style="western" xml:lang="en"><surname>Azat</surname><given-names>S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">seytkhan.azat@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Аллан</surname><given-names>И.</given-names></name><name name-style="western" xml:lang="en"><surname>Alan</surname><given-names>I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">islam.102.ima@gmail.com</email><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">ТОО «Жалын»; Назарбаев Университет, “National Laboratory Astana”<country>Казахстан</country></aff><aff xml:lang="en">Zhalyn LLP; Nazarbayev University, National Laboratory Astana<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">ТОО «Жалын»; Казахский национальный университет им. Аль-Фараби, Факультет химии и химической технологии<country>Казахстан</country></aff><aff xml:lang="en">Zhalyn LLP; Al-Farabi Kazakh National University, Faculty of Chemistry and Chemical Technology<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">ТОО «Жалын»; Казахский национальный университет им. Аль-Фараби, Факультет химии и химической технологии; Казахский национальный исследовательский технический университет им. К.И. Сатпаева<country>Казахстан</country></aff><aff xml:lang="en">Zhalyn LLP; Al-Farabi Kazakh National University, Faculty of Chemistry and Chemical Technology; Kazakh National Research Technical University named after K.I. Satbayev<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru">Казахский национальный университет им. Аль-Фараби, Факультет химии и химической технологии<country>Казахстан</country></aff><aff xml:lang="en">Al-Farabi Kazakh National University, Faculty of Chemistry and Chemical Technology<country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>28</day><month>09</month><year>2022</year></pub-date><volume>0</volume><issue>3</issue><fpage>69</fpage><lpage>74</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сатаева А., Тауанов Ж., Жантикеев У., Байменов А., Азат С., Аллан И., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Сатаева А., Тауанов Ж., Жантикеев У., Байменов А., Азат С., Аллан И.</copyright-holder><copyright-holder xml:lang="en">Satayeva A., Tauanov Z., Zhantikeev U., Baimenov A., Azat S., Alan 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://journals.nnc.kz/jour/article/view/434">https://journals.nnc.kz/jour/article/view/434</self-uri><abstract><p>В статье приведены результаты разработки новых композитных материалов, полученных из летучей золы угля (ЛЗУ) методом Фьюжн.Композитные материалы легированы наночастицами серебра и охарактеризованы с использованием передовых методов определения их структурных показателей, а именно: рентгенофазового анализа (XRD), сканирующей электронной микроскопии с элементами полуколичественного анализа (SEM-EDS) и рентгенофлуоренцентного анализа (XRF). В ходе получения синтетических цеолитов на основе ЛЗУ структурная модификация проводилась для быстрого связывания цеолитов с ртутью при удалении ее из водной среды и улучшения качества воды. Синтезированные нанокомпозиты использовались для удаления ртути из водных растворов с различным pH. Установлено, что равновесие адсорбционной способности для синтетических цеолитов наступает примерно через 2 недели, в то время как для исходных ЛЗУ достигается в течение месяца. Предварительные результаты показывают значительно высокое удаление ртути из раствора – от 80 до 90% от исходной концентрации.</p></abstract><trans-abstract xml:lang="en"><p>The article presents the results of the development of new composite materials obtained from coal fly ash (CFA) by the Fusion method.The composite materials are doped with silver nanoparticles and characterized using advanced characterization methods, namely XRD, SEM-EDS, XRF. In the course of obtaining synthetic zeolites based on CFA, structural modification was carried out to quickly bind zeolites with mercury when it was removed from the aqueous medium and improve the physicochemical properties. The synthesized nanocomposites were used to remove Hg from aqueous solutions with different pH. It was found that the equilibrium of the adsorption capacity for synthetic zeolites occurs after about 2 weeks, while for the original CFA it is reached within a month. Preliminary results show a significantly high removal of mercury from the solution – from 80 to 90% of mercury ions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>адсорбция</kwd><kwd>ртуть</kwd><kwd>цеолиты</kwd><kwd>синтетические нанокомпозиты</kwd><kwd>летучая зола</kwd></kwd-group><kwd-group xml:lang="en"><kwd>adsorption</kwd><kwd>mercury</kwd><kwd>zeolites</kwd><kwd>synthesized nanocomposites</kwd><kwd>fly ash</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа выполнена в рамках проекта МОН РК, ИРН проекта: AP08857007 «Синтетические магнитные композиты, полученные из летучей золы угля для решения водно-экологических проблем загрязнения ртутью».</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">Seitkhan Azat, Synthesis of biosourced silica-Ag nanocomposites and amalgamation reaction with mercury in aqueous solutions / Azat Seitkhan, Elizabeth Arkhangelsky, Thanasis Papathanasiou, Antonis A. Zorpas, Askar Abirov and Vassilis J. Inglezakis // Comptes Rendus Chimie. – 2020. – Volume 23, issue 1. – P. 77–92.</mixed-citation><mixed-citation xml:lang="en">Seitkhan Azat, Synthesis of biosourced silica-Ag nanocomposites and amalgamation reaction with mercury in aqueous solutions / Azat Seitkhan, Elizabeth Arkhangelsky, Thanasis Papathanasiou, Antonis A. Zorpas, Askar Abirov and Vassilis J. Inglezakis // Comptes Rendus Chimie. – 2020. – Volume 23, issue 1. – P. 77–92.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Gomes, M.V.T. Phytoremediation of water contaminated with mercury using Typha domingensis in constructed wetland / M. V. T. Gomes, R. R. de Souza, V. S. Teles, E. Araújo Mendes, // Chemosphere. – 2014. – Vol. 103. – P. 228–233.</mixed-citation><mixed-citation xml:lang="en">Gomes, M.V.T. Phytoremediation of water contaminated with mercury using Typha domingensis in constructed wetland / M. V. T. Gomes, R. R. de Souza, V. S. Teles, E. Araújo Mendes, // Chemosphere. – 2014. – Vol. 103. – P. 228–233.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Saranya, K. Bioremediation of mercury by vibrio fluvialis screened from industrial effluents / K. Saranya, A. Sundaramanickam, S. Shekhar, S. Swaminathan, T. Balasubramanian // Biomed Res. Int. – Volume 2017. – Article ID 6509648. https://doi.org/10.1155/2017/6509648</mixed-citation><mixed-citation xml:lang="en">Saranya, K. Bioremediation of mercury by vibrio fluvialis screened from industrial effluents / K. Saranya, A. Sundaramanickam, S. Shekhar, S. Swaminathan, T. Balasubramanian // Biomed Res. Int. – Volume 2017. – Article ID 6509648. https://doi.org/10.1155/2017/6509648</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Chiarle, S. Mercury removal from water by ion exchange resins adsorption / S. Chiarle, M. Ratto, M. Rovatti // Water Research. – 2000. 34(11). – P. 2971–2978.</mixed-citation><mixed-citation xml:lang="en">Chiarle, S. Mercury removal from water by ion exchange resins adsorption / S. Chiarle, M. Ratto, M. Rovatti // Water Research. – 2000. 34(11). – P. 2971–2978.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Zhang, F.-S. Mercury removal from water using activated carbons derived from organic sewage sludge / F.-S. Zhang, J. O. Nriagu, H. Itoh // Water Res. – 2005, 39. – P. 389–395.</mixed-citation><mixed-citation xml:lang="en">Zhang, F.-S. Mercury removal from water using activated carbons derived from organic sewage sludge / F.-S. Zhang, J. O. Nriagu, H. Itoh // Water Res. – 2005, 39. – P. 389–395.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Chojnacki, A. The application of natural zeolites for mercury removal: From laboratory tests to industrial scale / A. Chojnacki, K. Chojnacka, J. Hoffmann, H. Górecki // Miner. Eng. – 2004. 17. – P. 933–937.</mixed-citation><mixed-citation xml:lang="en">Chojnacki, A. The application of natural zeolites for mercury removal: From laboratory tests to industrial scale / A. Chojnacki, K. Chojnacka, J. Hoffmann, H. Górecki // Miner. Eng. – 2004. 17. – P. 933–937.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Azimi, A. Removal of Heavy Metals from Industrial Wastewaters: A Review / A. Azimi, A. Azari, M. Rezakazemi, M. Ansarpour // ChemBioEng Rev. – 2017. 4 – P. 37–59</mixed-citation><mixed-citation xml:lang="en">Azimi, A. Removal of Heavy Metals from Industrial Wastewaters: A Review / A. Azimi, A. Azari, M. Rezakazemi, M. Ansarpour // ChemBioEng Rev. – 2017. 4 – P. 37–59</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Arkhangelsky, E. Nanoparticles as a Powerful Tool for Membrane Pore Size Determination and Mercury Removal / E. Arkhangelsky, V. Inglezakis, V. Gitis, A.V. Korobeinyk // Chapter in book: Nanotechnology in Water and Wastewater Treatment. – P. 63–86.</mixed-citation><mixed-citation xml:lang="en">Arkhangelsky, E. Nanoparticles as a Powerful Tool for Membrane Pore Size Determination and Mercury Removal / E. Arkhangelsky, V. Inglezakis, V. Gitis, A.V. Korobeinyk // Chapter in book: Nanotechnology in Water and Wastewater Treatment. – P. 63–86.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Gottardi, G. Mineralogy and crystal chemistry of zeolites in: Sand / G. Gottardi, L. Mumpton, F. (eds.) // Natural Zeolites, Oxford: Pergamon. – 1978. – P. 31–442.</mixed-citation><mixed-citation xml:lang="en">Gottardi, G. Mineralogy and crystal chemistry of zeolites in: Sand / G. Gottardi, L. Mumpton, F. (eds.) // Natural Zeolites, Oxford: Pergamon. – 1978. – P. 31–442.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Gottardi, G.; Galli, E.Natural zeolites, Berlin: SpringerVerlag, 1985. Passaglia, E.; Sheppard, R. A.: The crystal chemistry of zeolites, in:Bish, D. L.; Ming, D. W. (eds.): Natural zeolites: Occurrence, properties, applications: Reviews in mineralogy and geochemistry (45), Washington, DC: Mineralogical Society of America. – 2001 – P. 69–1164.</mixed-citation><mixed-citation xml:lang="en">Gottardi, G.; Galli, E.Natural zeolites, Berlin: SpringerVerlag, 1985. Passaglia, E.; Sheppard, R. A.: The crystal chemistry of zeolites, in:Bish, D. L.; Ming, D. W. (eds.): Natural zeolites: Occurrence, properties, applications: Reviews in mineralogy and geochemistry (45), Washington, DC: Mineralogical Society of America. – 2001 – P. 69–1164.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Deer, W. A.; Howie, R.; Wise, W. S.; Zussmann, J.: Rock forming minerals Volume 4B: Framework silicates: Silica minerals, Feldspathoids and the Zeolites, London: Geological Society of London, 2004.</mixed-citation><mixed-citation xml:lang="en">Deer, W. A.; Howie, R.; Wise, W. S.; Zussmann, J.: Rock forming minerals Volume 4B: Framework silicates: Silica minerals, Feldspathoids and the Zeolites, London: Geological Society of London, 2004.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Syed Salman, Conversion of coal fly ash to zeolite utilizing microwave and ultrasound energies: A review / Syed Salman Bukhar, Jamshid Behin, Hossein Kazemian, Sohrab Rohani // Fuel 140 (2015). – P. 250–266.</mixed-citation><mixed-citation xml:lang="en">Syed Salman, Conversion of coal fly ash to zeolite utilizing microwave and ultrasound energies: A review / Syed Salman Bukhar, Jamshid Behin, Hossein Kazemian, Sohrab Rohani // Fuel 140 (2015). – P. 250–266.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Luiz Fernando Oliveira Maia, Removal of mercury (II) from contaminated water by gold-functionalised Fe3O4 magnetic nanoparticles / Luiz Fernando Oliveira Maia, Mayra Soares Santos, Thainá Gusmão Andrade, Rodrigo de Carvalho Hott, Márcia Cristina da Silva Faria, Luiz Carlos Alves Oliveira, Márcio César Pereira &amp; Jairo Lisboa Rodrigues. // Environmental Technology. https://doi.org/10.1080/09593330.2018.1515989</mixed-citation><mixed-citation xml:lang="en">Luiz Fernando Oliveira Maia, Removal of mercury (II) from contaminated water by gold-functionalised Fe3O4 magnetic nanoparticles / Luiz Fernando Oliveira Maia, Mayra Soares Santos, Thainá Gusmão Andrade, Rodrigo de Carvalho Hott, Márcia Cristina da Silva Faria, Luiz Carlos Alves Oliveira, Márcio César Pereira &amp; Jairo Lisboa Rodrigues. // Environmental Technology. https://doi.org/10.1080/09593330.2018.1515989</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Liu, Y. Reusable DNA-functionalized-graphene for ultrasensitive mercury (II) detection and removal. Biosens / Liu, Y., Wang, X., Wu, H. // Biosensors and Bioelectronics. – 2017. – Volume 87. – P. 129–135.</mixed-citation><mixed-citation xml:lang="en">Liu, Y. Reusable DNA-functionalized-graphene for ultrasensitive mercury (II) detection and removal. Biosens / Liu, Y., Wang, X., Wu, H. // Biosensors and Bioelectronics. – 2017. – Volume 87. – P. 129–135.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Vassilis J. Inglezakis, Magnetic Fe3O4-Ag0 Nanocomposites for Effective Mercury Removal from Water / Vassilis J. Inglezakis, Aliya Kurbanova, Anara Molkenova, Antonis A. Zorpas and Timur Sh. Atabaev // Sustainability. – 2020, 12, 5489. https://doi.org/10.3390/su12135489.</mixed-citation><mixed-citation xml:lang="en">Vassilis J. Inglezakis, Magnetic Fe3O4-Ag0 Nanocomposites for Effective Mercury Removal from Water / Vassilis J. Inglezakis, Aliya Kurbanova, Anara Molkenova, Antonis A. Zorpas and Timur Sh. Atabaev // Sustainability. – 2020, 12, 5489. https://doi.org/10.3390/su12135489.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Li Xian-bo, Yе Jun-jian, Liu Zhi-hong, Qiu Yue-qin, Li Long-jiang, Mao Song, Wang Xian-chen, Zhang Qin, Microwave digestion and alkali fusion assisted hydrothermal synthesis of zeolite from coal fly ash for enhanced adsorption of Cd(II) in aqueous solution. - J. Cent. South Univ. (2018) 25: 9−20, https://doi.org/10.1007/s11771-018-3712-0</mixed-citation><mixed-citation xml:lang="en">Li Xian-bo, Yе Jun-jian, Liu Zhi-hong, Qiu Yue-qin, Li Long-jiang, Mao Song, Wang Xian-chen, Zhang Qin, Microwave digestion and alkali fusion assisted hydrothermal synthesis of zeolite from coal fly ash for enhanced adsorption of Cd(II) in aqueous solution. - J. Cent. South Univ. (2018) 25: 9−20, https://doi.org/10.1007/s11771-018-3712-0</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Zhandos Tauanov, Dhawal Shah, Vassilis Inglezakis, Prashant K. Jamwal Hydrothermal synthesis of zeolite production from coal fly ash: A heuristic approach and its optimization for system identification of conversion. – Journal of Cleaner Production 182 (2018) 616 – 623.</mixed-citation><mixed-citation xml:lang="en">Zhandos Tauanov, Dhawal Shah, Vassilis Inglezakis, Prashant K. Jamwal Hydrothermal synthesis of zeolite production from coal fly ash: A heuristic approach and its optimization for system identification of conversion. – Journal of Cleaner Production 182 (2018) 616 – 623.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Tunde V. Ojumu, Pieter W. Du Plessis, Leslie F. Petrik, Synthesis of zeolite A from coal fly ash using ultrasonic treatment – A replacement for fusion step Ultrasonics Sonochemistry 31 (2016) 342–349.</mixed-citation><mixed-citation xml:lang="en">Tunde V. Ojumu, Pieter W. Du Plessis, Leslie F. Petrik, Synthesis of zeolite A from coal fly ash using ultrasonic treatment – A replacement for fusion step Ultrasonics Sonochemistry 31 (2016) 342–349.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
