Polychlorinated Biphenyls in the Snow Cover of South-Eastern Kazakhstan
Amirgaliyev N.A. Medeu A.R. Opp C. Madibekov A. Kulbekova R. Ismukhanova L. Zhadi A.
September 2022MDPI
Applied Sciences (Switzerland)
2022#12Issue 17
The presence of large sources of environmental pollution due to persistent organic pollutants (POPs), in particular, polychlorinated biphenyls (PCBs), in Kazakhstan necessitates the assessment of pollution as a result of these toxicants. For this purpose, we chose snow cover as an indicator for assessing pollution status in the study area. An assessment of the PCB accumulation level included in the list of POPs was carried out for a snow cover (SC) study in south-east Kazakhstan. The content of PCBs with a wide congener composition was determined using the chromatographic analysis method. During the winter periods of 2014, 2015, 2018–2020 and 2021, the SC pollution of the study area from up to 25 individual PCB congeners was identified. These congeners included highly toxic dioxin-like congener PCBs 105; 108; 114; 118 and “marker” PCBs 52; 101; 138; 153. These congeners were mainly found in snow samples with a wide range of PCB congener compositions. The main PCB pollution sources were indicated. The analysis of the obtained results and structure of the congener composition of PCBs show that the SC contamination in this territory occurs under the influence of local and regional sources.
congeners , pollution sources , POPs concentration , snow cover , toxicants
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Institute of Geography and Water Security of the Ministry of Education and Science of the Republic of Kazakhstan, Nur-Sultan, Z05K5K8, Kazakhstan
Department of Geography, Philipps-University of Marburg, Marburg, 35032, Germany
Institute of Geography and Water Security of the Ministry of Education and Science of the Republic of Kazakhstan
Department of Geography
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