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  <front>
    <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 pub-id-type="doi">10.31897/pmi.2019.5.528</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-13231</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/13231</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Металлургия и обогащение</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Metallurgy and concentration</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Intensification of Bacterial-Chemical Leaching of Nickel, Copper and Cobalt from Sulfide Ores Using Microwave Radiation</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Интенсификация бактериально-химического выщелачивания никеля, меди и кобальта из сульфидной руды с применением микроволнового излучения</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Kioresku</surname>
            <given-names>A. V.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Киореску</surname>
              <given-names>А. В.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Kioresku</surname>
              <given-names>A. V.</given-names>
            </name>
          </name-alternatives>
          <email>kioresku88@gmail.com</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Научно-исследовательский геотехнологический центр ДВО РАН (Петропавловск-Камчатский, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Far Eastern Branch of the RAS Scientific Research Geotechnological Centre (Petropavlovsk-Kamchatskii, Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="2019-10-23">
        <day>23</day>
        <month>10</month>
        <year>2019</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2019</year>
      </pub-date>
      <volume>239</volume>
      <fpage>528</fpage>
      <lpage>535</lpage>
      <history>
        <date date-type="received" iso-8601-date="2019-05-07">
          <day>07</day>
          <month>05</month>
          <year>2019</year>
        </date>
        <date date-type="accepted" iso-8601-date="2019-07-25">
          <day>25</day>
          <month>07</month>
          <year>2019</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2019-10-23">
          <day>23</day>
          <month>10</month>
          <year>2019</year>
        </date>
      </history>
      <permissions>
        <copyright-statement>© A. V. Kioresku</copyright-statement>
        <copyright-year>2019</copyright-year>
        <copyright-holder xml:lang="ru">А. В. Киореску</copyright-holder>
        <copyright-holder xml:lang="en">A. V. Kioresku</copyright-holder>
        <license xlink:href="http://creativecommons.org/licenses/by/4.0">
          <license-p>CC BY 4.0</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/13231">https://pmi.spmi.ru/pmi/article/view/13231</self-uri>
      <abstract xml:lang="ru">
        <p>В последние годы в России и за рубежом наблюдается устойчивая тенденция к истощению запасов богатой и легкообогатимой руды. В связи с этим все большее внимание уделяется технологии бактериально- химического выщелачивания (БХВ), которая в отличие от традиционных пирометаллургических методов обогащения хорошо применима для переработки низкосортного минерального сырья. Однако данная технология имеет существенный недостаток, который заключается в неспособности микроорганизмов создавать достаточно агрессивные условия для эффективной деструкции минеральных комплексов, что негативно сказывается на продолжительности процессов. В статье представлены результаты проведенного эксперимента, целью которого являлось исследование многократного кратковременного воздействия СВЧ-излучения на эффективность извлечения никеля, меди и кобальта в процессе бактериально-химического выщелачивания сульфидной руды. В качестве источника микроволнового излучения была использована СВЧ-печь мощностью 900 Вт и частотой излучения 2,45 ГГц. Облучение проводилось каждые сутки на протяжении всего эксперимента. Время экспозиции 5 и 10 с, плотность потока 0,7 Вт/см2. Было установлено, что при всех исследуемых режимах СВЧ-облучения наблюдается существенное повышение эффективности накопления биомассы и окислительной способности среды по сравнению с контролем, не подвергавшемуся воздействию микроволнового излучения. Облучение в течение 5 с дважды в сутки повысило извлечение никеля на 16 %, кобальта на 15 % и меди на 6 %. Результаты проведенного исследования позволяют оценить перспективы применения новых методов биотехнологии в промышленной практике переработки рудного сырья с улучшением качественных показателей.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>Currently, Russia and other countries display a steady tendency to decrease the amount of high grade and free- milling ore reserves. In this regard, the attention is being paid to the technology of bacterial-chemical leaching (BCL), which, unlike traditional pyrometallurgical enrichment methods, is well applicable for processing low-grade mineral raw materials. However, this technology has a significant drawback, which is the inability of microorganisms to create sufficiently aggressive conditions for the effective destruction of mineral complexes, which negatively affects the duration of the processes. The article presents the results of an experiment, the purpose of which was to study the multiple short-term effects of microwave radiation on the efficiency of extraction of nickel, copper, and cobalt in the process of bacterial-chemical leaching of sulfide ore. A microwave oven with a power of 900 W and a radiation frequency of 2.45 GHz was used as a source of microwave radiation. Irradiation was carried out every day throughout the experiment. The exposure time was 5 and 10 s; the flux density was 0.7 W/cm2. It was found that for all the studied microwave irradiation modes, a significant increase in the efficiency of biomass accumulation and the oxidizing ability of the medium was observed in comparison with the control that was not exposed to microwave radiation. Irradiation for 5 s twice a day increased the reduction of nickel by 16 %, cobalt by 15 % and copper by 6 %. The results of the study allow us to assess the prospects for the application of new biotechnology methods in the industrial practice of ore processing with an improvement in qualityindicators.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>биовыщелачивание</kwd>
        <kwd>микроволновое излучение</kwd>
        <kwd>СВЧ-излучение</kwd>
        <kwd>обогащение</kwd>
        <kwd>интенсификация</kwd>
        <kwd>хемолитотрофы</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>bioleaching</kwd>
        <kwd>microwave radiation</kwd>
        <kwd>enrichment</kwd>
        <kwd>intensification</kwd>
        <kwd>chemolithotrophs</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body/>
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