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    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id custom-type="edn" pub-id-type="custom">ASOYNX</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-16474</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/16474</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Геотехнология и инженерная геология</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Geotechnical Engineering and Engineering Geology</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Iron ore tailings as a raw material for Fe-Al coagulant production</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Получение смешанного коагулянта из отходов обогащения железной руды</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Matveeva</surname>
            <given-names>Vera A.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Матвеева</surname>
              <given-names>В. А.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Matveeva</surname>
              <given-names>Vera A.</given-names>
            </name>
          </name-alternatives>
          <email>poveriya@mail.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0001-9893-380X</contrib-id>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины II (Санкт-Петербург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Empress Catherine II Saint Petersburg Mining University (Saint Petersburg, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Chukaeva</surname>
            <given-names>Maria A.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Чукаева</surname>
              <given-names>М. А.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Chukaeva</surname>
              <given-names>Maria A.</given-names>
            </name>
          </name-alternatives>
          <email>Chukaeva_MA@pers.spmi.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0003-3643-6757</contrib-id>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины II (Санкт-Петербург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Empress Catherine II Saint Petersburg Mining University (Saint Petersburg, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Semenova</surname>
            <given-names>Aleksandra I.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Семёнова</surname>
              <given-names>А. И.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Semenova</surname>
              <given-names>Aleksandra I.</given-names>
            </name>
          </name-alternatives>
          <email>sashasemenova99@mail.ru</email>
          <contrib-id contrib-id-type="orcid">0009-0005-2380-8082</contrib-id>
          <xref ref-type="aff" rid="aff3"/>
        </contrib>
        <aff-alternatives id="aff3">
          <aff>
            <institution xml:lang="ru">Горный университет (Леобен, Австрия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Montanuniversity (Leoben, Austria)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="2024-07-04">
        <day>04</day>
        <month>07</month>
        <year>2024</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2024</year>
      </pub-date>
      <volume>267</volume>
      <fpage>433</fpage>
      <lpage>443</lpage>
      <history>
        <date date-type="received" iso-8601-date="2024-05-02">
          <day>02</day>
          <month>05</month>
          <year>2024</year>
        </date>
        <date date-type="accepted" iso-8601-date="2024-06-03">
          <day>03</day>
          <month>06</month>
          <year>2024</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2024-07-04">
          <day>04</day>
          <month>07</month>
          <year>2024</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 2024 В. А. Матвеева, М. А. Чукаева, А. И. Семёнова</copyright-statement>
        <copyright-statement xml:lang="en">© 2024 Vera A. Matveeva, Maria A. Chukaeva, Aleksandra I. Semenova</copyright-statement>
        <copyright-year>2024</copyright-year>
        <copyright-holder xml:lang="ru">В. А. Матвеева, М. А. Чукаева, А. И. Семёнова</copyright-holder>
        <copyright-holder xml:lang="en">Vera A. Matveeva, Maria A. Chukaeva, Aleksandra I. Semenova</copyright-holder>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="ru">
          <license-p>Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0)</license-p>
        </license>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="en">
          <license-p>This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/16474">https://pmi.spmi.ru/pmi/article/view/16474</self-uri>
      <abstract xml:lang="ru">
        <p>Представлены результаты экспериментальных исследований по получению смешанного коагулянта из отходов обогащения железной руды. Изучались следующие параметры: концентрация серной кислоты, температура, продолжительность выщелачивания, соотношение твердой и жидкой фаз (т:ж), а также наличие принудительного перемешивания. В рамках эксперимента установлены составы коагулянта и твердого осадка после выщелачивания. Максимальное содержание железа в растворе после выщелачивания получено с использованием 40 % H2SO4 при температуре 100 °С (с принудительным перемешиванием при 75 °С) и времени контакта 60 мин. Выход железа находился на уровне 25 % от общего содержания в хвостах обогащения. Химический анализ полученного раствора после выщелачивания показал содержание Fe и Al в форме сульфатов 11 и 2 % соответственно. Выполнена оценка эффективности работы коагулянта на модельных растворах цветности. Эксперимент показал, что полученный из отхода коагулянт может быть использован для очистки сточных вод в широком диапазоне от 4 до 12 единиц рН. Осадок после выщелачивания представляет собой мелкозернистый порошок, богатый диоксидом кремния, который может быть использован в качестве техногенного сырья в строительной отрасли. Проведенные исследования показали, что получение коагулянтов из отходов обогащения железной руды может рассматриваться как способ расширения производственной цепочки добычи железной руды и минимизации количества хвостов, подлежащих складированию в хвостохранилища. Представленное техническое решение позволяет комплексно решить проблему защиты окружающей среды путем создания из отходов новых целевых продуктов для очистки сточных вод.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>The paper presents the results of experimental research into the recovery of Fe-Al coagulant from iron ore tailings (IOTs). The variables investigated in the laboratory tests included sulphuric acid concentration, temperature, leaching time, solid/liquid phase ratio (S:L) and the presence of stirring. The experiment determined the composition of the coagulant and the solid residue after leaching. The maximum iron content in the solution after leaching was obtained using 40 % H2SO4 at a temperature of 100 °C (or with stirring at 75 °C) and a contact time of 60 minutes. In this case, the iron yield was at the level of 25 % of the total content in the iron ore tailings. Chemical analysis of the solution obtained after leaching showed Fe and Al sulphate contents of 11 and 2 % respectively. In the next step, the efficiency of the coagulant was evaluated on model solutions of colour. The experimental results showed that the coagulant obtained from the iron ore tailings can be used for wastewater treatment in a wide pH range from 4 to 12 pH units. The solid residue after leaching is a fine-grained powder rich in silica, which can potentially be used as an artificial raw material in the construction industry. The research carried out in this thesis has shown that the extraction of coagulants from iron ore tailings can be considered as a way to extend the production chain of iron ore mining and to minimise the amount of tailings to be stored in tailing ponds. The technical solution presented in this work allows to comprehensively solve the problem of environmental protection by creating new target products for wastewater treatment from IOTs.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>коагулянт</kwd>
        <kwd>утилизация отходов</kwd>
        <kwd>очистка сточных вод</kwd>
        <kwd>железорудные хвосты</kwd>
        <kwd>кислотное выщелачивание</kwd>
        <kwd>серная кислота</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>coagulant</kwd>
        <kwd>waste disposal</kwd>
        <kwd>wastewater treatment</kwd>
        <kwd>iron ore tailings</kwd>
        <kwd>acid leaching</kwd>
        <kwd>sulfuric acid</kwd>
      </kwd-group>
      <funding-group>
        <funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания Министерства науки и высшего образования Российской Федерации (FSRW-2024-0005)</funding-statement>
        <funding-statement xml:lang="en">This work was carried out within the framework of the state contract of the Ministry of Science and Higher Education of the Russian Federation (FSRW-2024-0005)</funding-statement>
      </funding-group>
    </article-meta>
  </front>
  <body/>
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