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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">gesj</journal-id><journal-title-group><journal-title xml:lang="en">GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY</journal-title><trans-title-group xml:lang="ru"><trans-title>GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2071-9388</issn><issn pub-type="epub">2542-1565</issn><publisher><publisher-name>Russian Geographical Society</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24057/2071-9388-2019-116</article-id><article-id custom-type="elpub" pub-id-type="custom">gesj-1050</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="en"><subject>REGULAR ISSUE</subject></subj-group></article-categories><title-group><article-title>Particle size partitioning of metals in humus horizons of two small erosional landforms in the middle Protva basin – a comparative study</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Samonova</surname><given-names>Olga A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Faculty of Geography, </p><p>Leninskiye Gori, 1, Moscow, 119991</p></bio><email xlink:type="simple">aseyeva@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Aseyeva</surname><given-names>Elena N.</given-names></name></name-alternatives><bio xml:lang="en"><p>Faculty of Geography, </p><p>Leninskiye Gori, 1, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>01</day><month>04</month><year>2020</year></pub-date><volume>13</volume><issue>1</issue><fpage>260</fpage><lpage>271</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Samonova O.A., Aseyeva E.N., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Samonova O.A., Aseyeva E.N.</copyright-holder><copyright-holder xml:lang="en">Samonova O.A., Aseyeva E.N.</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://ges.rgo.ru/jour/article/view/1050">https://ges.rgo.ru/jour/article/view/1050</self-uri><abstract><p>Partitioning of metals in soil particles of various size classes has been receiving greater significance due to the necessity to predict the behaviour and pathways of the potentially toxic elements in the environment. In this study the analysis of metals’ distribution in various particle size fractions was performed to characterize and compare geochemical features of the topsoil horizons of two small erosional landforms located in uncontaminated area of the central part of European Russia (the Middle Protva basin, mixed forest zone). The landforms represent two typical lithological types of gullies in the study area. Soil samples were fractionated and the concentrations of Fe, Mn, Ti, Zr, Ni, Co, Cr, Zn, Cu, Pb were determined in five particle size fractions: 1–0.25, 0.25-0.05, 0.05−0.01, 0.01–0.001 and &lt;0.001 mm. The metals’ concentrations and their distribution in various particle sizes were found to be related to gully litho-type. The contribution of the clay to the total amount of metals was the greatest for Mn, Zn, Ni and Co in both systems. The highest mass loading for Ti, Zr and Cr came from the coarse silt, while for Cu and Pb it was made by different particle size fractions: the medium and fine silt or the coarse silt. The highest contribution of Fe also came from different fractions, either from the coarse sand or the clay depending on the system.</p></abstract><kwd-group xml:lang="en"><kwd>soil</kwd><kwd>humus horizons</kwd><kwd>distribution</kwd><kwd>heavy metals</kwd><kwd>particle size fractions</kwd><kwd>gully</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This research was supported by the Russian Science Foundation (Project No. 19-77-30004).</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">Acosta J., Faz Cano A., Arocena J., Debela F. and Martínez-Martínez S. (2009). 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