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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Ecology and Life Safety</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Ecology and Life Safety</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Экология и безопасность жизнедеятельности</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-2310</issn><issn publication-format="electronic">2408-8919</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">22148</article-id><article-id pub-id-type="doi">10.22363/2313-2310-2019-27-2-105-116</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Geoecology</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Геоэкология</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Problems of polycyclic aromatic hydrocarbons studying in the waters of North-Eastern Caspian Sea</article-title><trans-title-group xml:lang="ru"><trans-title>Проблемы изучения полициклических ароматических углеводородов в водах Северо-Восточного Каспия</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khaustov</surname><given-names>Alexander P</given-names></name><name xml:lang="ru"><surname>Хаустов</surname><given-names>Александр Петрович</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Geological and Mineralogical Sciences, Professor of the Department of Applied Ecology, Ecological Faculty</p></bio><bio xml:lang="ru"><p>доктор геолого-минералогических наук, профессор кафедры прикладной экологии, экологический факультет</p></bio><email>akhaustov@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kenzhin</surname><given-names>Zhandos D</given-names></name><name xml:lang="ru"><surname>Кенжин</surname><given-names>Жандос Даутович</given-names></name></name-alternatives><bio xml:lang="en"><p>post-graduate student of the Department of Applied Ecology, Ecological Faculty</p></bio><bio xml:lang="ru"><p>аспирант кафедры прикладной экологии, экологический факультет</p></bio><email>jandos-k@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia (RUDN University)</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2019-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2019</year></pub-date><volume>27</volume><issue>2</issue><issue-title xml:lang="en">VOL 27, NO2 (2019)</issue-title><issue-title xml:lang="ru">ТОМ 27, №2 (2019)</issue-title><fpage>105</fpage><lpage>116</lpage><history><date date-type="received" iso-8601-date="2019-11-17"><day>17</day><month>11</month><year>2019</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Khaustov A.P., Kenzhin Z.D.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Хаустов А.П., Кенжин Ж.Д.</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Khaustov A.P., Kenzhin Z.D.</copyright-holder><copyright-holder xml:lang="ru">Хаустов А.П., Кенжин Ж.Д.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/ecology/article/view/22148">https://journals.rudn.ru/ecology/article/view/22148</self-uri><abstract xml:lang="en"><p>The problems of studying the negative factors of oil and gas activity in the waters of the North-Eastern Caspian Sea are presented. Despite the active anthropogenic activity, the specificity of hydrocarbon pollution in this part of the water area is poorly understood. The approaches to the analysis of the qualitative composition and identification of sources of polycyclic aromatic hydrocarbons (PAHs) pollution based on the indicator ratios of kinetic and thermodynamic isomers are presented. These approaches make it possible to identify the source of pollution, but a full assessment requires taking into account the seasonal dynamics of the sta- tus of aquatic systems. Estimates of the migration features of PAHs and their definitions in the aqueous phase are given. The problems of transition and the study of polyarenes to bottom sediments are assessed. The issues of the degradation of PAH and oil products in the aquatic systems of the region are considered, recommendations are given to improve the development of the research base of the reviewed topics.</p></abstract><trans-abstract xml:lang="ru"><p>Статья посвящена проблемам изучения негативных факторов проявления нефтегазовой деятельности в акватории Северо-Восточного Каспия. Несмотря на активную антропогенную деятельность, специфика углеводородного загрязнения этой части акватории изучена слабо. Представлены подходы к анализу качественного состава и идентификации источников загрязнения полициклическими ароматическими углеводородами (ПАУ) на основе индикаторных соотношений кинетических и термодинамических изомеров. Данные подходы позволяют идентифицировать источник загрязнения, однако полноценная оценка требует учета сезонной динамики состояния аквальных систем. Приведены миграционные особенности ПАУ и принципы их определения в водной фазе. Оценены проблемы перехода и изученности полиаренов в донные отложения. Рассмотрены вопросы деградации ПАУ и нефтепродуктов в аквасистемах данного региона, даны рекомендации по улучшению развития научно-исследовательской базы по рассматриваемой тематике.</p></trans-abstract><kwd-group xml:lang="en"><kwd>water area</kwd><kwd>bottom sediments</kwd><kwd>oil pollution</kwd><kwd>migration</kwd><kwd>polycyclic aromatic hydrocarbons</kwd><kwd>biota</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>акватория</kwd><kwd>донные отложения</kwd><kwd>нефтяное загрязнение</kwd><kwd>миграция</kwd><kwd>полициклические ароматические углеводороды</kwd><kwd>микробиота</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Gershanovich DE, Grunduls ZS. Suspended substances in the waters of the Northern Caspian. 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