Quantification and the sources identification of total and insoluble hexavalent chromium in ambient PM: A case study of Aktobe, Kazakhstan
Adotey E.K. Burkutova L. Tastanova L. Bekeshev A. Balanay M.P. Sabanov S. Rule A.M. Hopke P.K. Amouei Torkmahalleh M.
November 2022Elsevier Ltd
Chemosphere
2022#307
Hexavalent chromium (Cr(VI)), a known carcinogen, emanates from both anthropogenic and natural sources. A pilot study of the ambient Cr(VI) concentrations was conducted at the center of Aktobe which is a few kilometers away from major industrial chromium plants. Total Cr(VI) concentrations were measured in the fall and winter seasons with mean values (S.D) of 5.30 (2.16) ng/m3 and 2.26 (1.80) ng/m3, respectively. Insoluble Cr(VI) levels were 4.80 (1.96) and 2.19 (1.75) ng/m3 for the fall and winter, respectively. The total and insoluble Cr(VI) concentrations in the fall season were significantly higher than in winter, likely due to the higher rate of Cr(III) oxidation in the presence of ozone and ROS in fall compared to the rate of Cr(VI) reduction in the presence of VOCs at higher temperatures. On average, total Cr(VI) constituted 34.49% of the total Cr concentrations suggesting that the dominant valence state of Cr in the atmosphere is Cr(III). The previous reference values of exposure to Cr(VI) must be revisited by taking into account the insoluble Cr(VI) concentration since it is more prevalent in the atmosphere compared to soluble Cr(VI). The influence of the chromium plants as potential sources was not obvious in this study.
Atmospheric chemistry , IC-UV , Insoluble hexavalent chromium , Kazakhstan , Microwave digestion
Text of the article Перейти на текст статьи
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
K. Zhubanov Aktobe University, A. Moldagulova Ave., 34, Aktobe, 030000, Kazakhstan
Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Department of Mining, School of Mining and Geosciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Department of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, 14642, NY, United States
Institute for a Sustainable Environment, Clarkson University, Potsdam, 13699, NY, United States
Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, 20209, MD, United States
Division of Environmental and Occupational Health Sciences, School of Public Health, University of Illinois at Chicago, Chicago, 60612, IL, United States
Department of Chemical and Materials Engineering
K. Zhubanov Aktobe University
Department of Chemistry
Department of Mining
Department of Public Health Sciences
Institute for a Sustainable Environment
Department of Environmental Health and Engineering
Division of Environmental and Occupational Health Sciences
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026