MONITORING THE LEVEL OF POLYCHLORATED BIPHENILES POLLUTION IN THE ILE RIVER FALLS
ІЛЕ ӨЗЕНІ САЛАЛАРЫНЫҢ ПОЛИХЛОРЛАНҒАН БИФЕНИЛДЕРМЕН ЛАСТАНУ ДЕҢГЕЙІН МОНИТОРИНГІЛЕУ
МОНИТОРИНГ УРОВНЯ ЗАГРЯЗНЕННОСТИ ПРИТОКОВ РЕКИ ИЛЕ ПОЛИХЛОРИРОВАННЫМИ БИФЕНИЛАМИ
Amirgaliev N. Ismukhanova L. Madibekov A. Sultanbekova B. Sultanayeva A.
November-December 2025National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2025#2025-November-DecemberIssue 632 - 46 pp.
One of the important environmental issues under current conditions is the pollution of Kazakhstan’s water bodies and watercourses by persistent organic substances, particularly the highly toxic polychlorinated biphenyls (PCBs) included in their list, which determines the relevance of this study. The aim of the work was to assess the PCB contamination level of the main tributaries of the Ili River based on long-term observations. The investigations were conducted in 2014, 2015, 2018, 2019, as well as in 2023 and 2024. Water sample analysis was carried out in accordance with STB ISO 6468-2003 (2004) using a “Khromos GC-1000” gas chromatograph with dedicated software. PCB contamination was identified in the waters of all studied watercourses, along with the presence of a large number of individual congeners, including strictly regulated “marker” and dioxin-like ones. The main sources of PCB contamination in the examined rivers were identified, and their diverse origin was demonstrated, as evidenced by the wide variety of the toxicant’s congener composition. Altogether, these findings suggest increased toxicity of the river water resources with respect to PCBs. Significant interannual variability in the level of contamination was revealed, as well as a noticeable decrease in 2023 and 2024 compared with the previous period. The results of the study may be used by national and local environmental authorities in developing practical measures to protect rivers from contamination by these highly toxic pollutants, in accordance with the requirements of the Stockholm Convention on POPs.
congeners , polychlorinated biphenyls , transboundary runoff , transformation
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Academician of Kazakhstan National Academy of Natural Sciences, “Institute of Geography and Water Security” JSC, Almaty, Kazakhstan
JSC «Institute of Geography and Water Security», Al-Farabi Kazakh National University, Almaty, Kazakhstan
JSC «Institute of Geography and Water Security», Almaty, Kazakhstan
Academician of Kazakhstan National Academy of Natural Sciences
JSC «Institute of Geography and Water Security»
JSC «Institute of Geography and Water Security»
10 лет помогаем публиковать статьи Международный издатель
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