MONITORING OF ACCUMULATION OF POLYCHLORINATED BIPHENYLS IN THE SNOW COVER IN THE ALMATY AGGLOMERATION
Amirgaliyev N. Askarova M. Kulbekova R. Ismukhanova L. Madibekov A.
2022National 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
2022#2022Issue 428 - 43 pp.
There are presented results of the accumulation of polychlorinated biphenyls (PCBs) – the most toxic compounds among persistent organic pollutants (POPS) in the snow cover (SC) study (2018 and 2020) in the Almaty agglomeration (AA). Protection of the natural environment and the population from the efects of POPs, including PCBs, is one of the most acute problems for Kazakhstan. Тhe territory of AA is experiencing a serious technogenic load, the concentration of a number of pollutants in its natural objects exceeds the permissible standards. Snow cover among natural objects, is one of the informative indicators of pollution of the natural environment, including the air basin, and reflects the main trends in the spread of pollutants in the region. For the first time, studies of the level of PCBs contamination of the SC of the vast AA, by taking snow samples at a large number of points, using modern chromatographic methods and instruments, established the contamination of its territory with these dangerous toxicants. Up to 22 individual PCBs congeners were identified in the SC of the agglomeration. Strictly controlled «marker» (indicator) and highly toxic dioxin-like congeners were registered in snow samples with a wide range of PCBs congener composition. The analysis of analytical data and the container composition of PCBs allows us to note that the SC of the agglomeration is polluted by regional sources. The results of the study can be used by government agencies and scientific institutions in assessing the level of pollution of the SС territory of Kazakhstan, including urban agglomerations.
concentration , congeners , pollution , snow water , toxicants
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JSC «Institute of Geography and Water Security», Almaty, Kazakhstan
Al-Farabi Kazakh National University, Almaty, Kazakhstan
JSC «Institute of Geography and Water Security»
Al-Farabi Kazakh National University
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