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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">kaz44</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Университета Шакарима. Серия технические науки</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Shakarim University. Technical Sciences</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2788-7995</issn><issn pub-type="epub">3006-0524</issn><publisher><publisher-name>«Шәкәрім университеті» КеАҚ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.53360/2788-7995-2024-2(14)-64</article-id><article-id custom-type="elpub" pub-id-type="custom">kaz44-1213</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>ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ (ОРИГИНАЛЬНАЯ СТАТЬЯ)</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CHEMICAL TECHNOLOGY (ORIGINAL ARTICLE)</subject></subj-group></article-categories><title-group><article-title>ТОКСИЧНОСТЬ И СТАБИЛЬНОСТЬ ЖЕЛЕЗО-МЫШЬЯКОВОГО СПЛАВА</article-title><trans-title-group xml:lang="en"><trans-title>TOXICITY AND STABILITY OF IRON-ARSENIC ALLOY</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9309-500X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сейткан</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Seitkan</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Айнур Сейтканкызы Сейткан – кандидат технических наук, доцент Высшей школы естественных наук</p><p>010000, Республика Казахстан, Астана, пр. Кабанбай батыра, 8 </p></bio><bio xml:lang="en"><p>Ainur Seitkan – сandidate of technical sciences, associated professor of the Higher School of Natural Sciences</p><p>010000, Republic of Kazakhstan, Astana, 8 Kabanbay batyr avenue </p><p> </p></bio><email xlink:type="simple">seitkanainur.77@mail.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/0000-0001-9513-0147</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Редферн</surname><given-names>С. Э.Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Redfren</surname><given-names>S. A.T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Саймон Энтони Тернер Редферн – PhD, профессор, декан колледжа науки</p><p>639798, Сингапур, пр. Наньян, 50 </p></bio><bio xml:lang="en"><p>Simon Anthony Turner Redfern – professor, PhD, Dean of the College of Science</p><p>639798, Singapore, 50 Nanyang Avenue </p></bio><email xlink:type="simple">simon.redfern@ntu.edu.sg</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Международный университет Астана<country>Казахстан</country></aff><aff xml:lang="en">Astana International University<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Наньянский технологический университет <country>Сингапур</country></aff><aff xml:lang="en">Nanyang Technological University<country>Singapore</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>29</day><month>06</month><year>2024</year></pub-date><volume>1</volume><issue>2(14)</issue><fpage>536</fpage><lpage>542</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сейткан А.С., Редферн С.Э., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Сейткан А.С., Редферн С.Э.</copyright-holder><copyright-holder xml:lang="en">Seitkan A.S., Redfren S.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://tech.vestnik.shakarim.kz/jour/article/view/1213">https://tech.vestnik.shakarim.kz/jour/article/view/1213</self-uri><abstract><p>Железо-мышьяковый сплав является отходом новой технологии извлечения золота из упорных золото-мышьяковых концентратов – прямой восстановительной плавки. В данной статье представлены результаты исследования токсичности и стабильности Fe-As сплава в водных растворах. «Процедура определения характеристик токсичности выщелачиваним» (ПХТВ) была использована для оценки потенциальной токсичности твердого Fe-As сплава. Результаты ПХТВподобного теста позволяют предположить, что сплав нестабилен в кислотной среде (pH 2,88) и выделяет As в концентрациях, превышающих пороговый уровень токсичности более чем в четыре раза. Для сравнения, также, была оценена токсичность пыли арсената кальция. Было обнаружено, что пыль выделяет в 40 раз больше мышьяка, чем железо-мышьяковый сплав. Для оценки стабильности твердого Fe-As сплава была применена «Процедура выщелачивания искусственными (атмосферными) осадками» (ПВИО). Концентрация As в фильтратах ПВИО-подобного теста находились в пределах нормы, что свидетельствует об относительной стабильности Fe-As сплава в растворах с pH 5, подобных атмосферным осадкам. Длительные испытания на выщелачивание в экологически безопасном диапазоне pH от 5 до 9 при температуре 22°С показывают, что Fe-As сплава характеризуется высокой чувствительностью к кислым условиям среды. Растворимость мышьяка была высокой при pH5 и pH6, что позволяет предположить, что в долгосрочной перспективе сплав может проявлять подвижность в окружающей среде при воздействии атмосферных осадков и, конечно же, кислотных дождей. Однако в нейтральных и щелочных условиях pH, типичных для монополигонов, сплав сохраняет стабильность в течение длительного времени.</p></abstract><trans-abstract xml:lang="en"><p>Iron-arsenic alloy is a waste-form of a novel gold recovery technology from gold-arsenicbearing concentrates. This study investigates toxicity and solubility of Fe-As alloy in aqueous solutions. Results of the TCLP-like test, to evaluate the potential toxicity of a solid Fe-As alloy, suggest that the alloy is not stable in acidic conditions (pH 2.88), and releases As in concentrations exceeding the TC threshold level by more than four times. Calcium arsenate dust toxicity has been also evaluated for comparison. It was found to release 40 times more As than iron-arsenic alloy. Concentrations of As in the SPLP-like test leachates were well within the regulatory limit, thus demonstrating the relative stability of the Fe-As alloy in normal meteoric waters (pH 5). Long-term leaching tests in the environmentally-relevant pH range of 5 to 9 at 22°С demonstrate that FeAs alloy is very susceptible to acidic pH conditions. Arsenic solubilization was high under acidic conditions (at pH5 and pH6), which suggests that in the long term it can be mobilized within the environment if exposed to meteoric waters, and certainly to acid rain. However, at the neutral and alkaline pH conditions typical of monofills it appears to be stable over the long term.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>извлечение золота</kwd><kwd>Fe-As сплав</kwd><kwd>мышьяк</kwd><kwd>токсичность</kwd><kwd>стабильность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gold recovery</kwd><kwd>Fe-As alloy</kwd><kwd>arsenic</kwd><kwd>toxicity</kwd><kwd>stability</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">Magalhaes M. Arsenic. An environmental problem limited by solubility / M. Magalhaes // Pure and Applied Chemistry. – 2002. –10. – P. 1843-1850.</mixed-citation><mixed-citation xml:lang="en">Magalhaes M. Arsenic. An environmental problem limited by solubility / M. 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