The Role of PAHs as an Indicator of the Geochemical Barriers’ Functioning in the Marginal Filter of the Northern Dvina River
https://doi.org/10.31857/S2587556620010148
Abstract
Carried out the analysis of the behavior of the most common polycyclic aromatic hydrocarbons (PAHs) in the region: anthracene (An), phenanthrene (Phen), naphthalene (Naph), pyrene (Py), fluoranthene (Flu), chrysene (Chr), benzo(a)pyrene (BaP), perylene (Pl). PAHs can be considered as reliable indicators of the formation and interaction of components within the marginal filter, including the development of anthropogenic processes. In the present material a phenomenological model of migration and formation of associations of the most persistent compounds in the range of geochemical barriers was developed. Based on the scheme of PAHs flows in the components of the aquatic system confirmed the predominant of their migration on suspended material, including biota. The specificity of the chemical structures of the PAHs determines the characteristics of the transition of PAHs in different zones of the marginal filter in case of interaction in systems “snow–ice”, “ice–water”, “water–suspensions” (including seston), “water–bottom sediments”. Evaluated the relationship between important physical and chemical properties of PAHs as factors in their migration activity and real distributions of activity migration and transformation of complexes of PAHs in different zones of the marginal filter. Identified active and passive PAHs from the point of view of their migration and accumulation in the components of aquatic systems. Carried out the typization of PAHs according to the conditions of their migration through barriers considering their physicochemical properties.
Keywords
geochemical barrier,
polycyclic aromatic hydrocarbons (PAHs),
marginal filter,
suspended matter,
bottom sediments,
snow,
ice,
seston
Supporting agencies: The study was carried out within the framework of the state-ordered research theme of the Institute of Geography RAS, no. 0149-2019-0007, and with financial support received from the RFBR (projects no. 17-05-00356, no. 18- 05-80049).
About the Authors
I. A. Nemirovskaya
Shirshov Institute of Oceanology RAS
Russian Federation
Moscow
Russian Federation
Moscow
A. P. Khaustov
Peoples’ Friendship University of Russia
Russian Federation
Moscow
Russian Federation
Moscow
M. M. Redina
Peoples’ Friendship University of Russia
Russian Federation
Moscow
Russian Federation
Moscow
References
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Graphical Abstract
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1. Структура потоков ПАУ в аквальной системе Северной Двины | |
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2. Scheme of PAHs flows in the aquatic system of Northern Dvina River | |
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- Geochemical barriers play a crucial role in the matter and energy flows distribution in marginal filters.
- Geochemical barriers represent an active self-organizing medium, centres of evolution of geochemical systems.
- The most contrasting mass transfer models are based on the data on PAHs migration.
- Insulating properties of geochemical barriers in the aquatic system differ by 5 orders of magnitude.
- Maximum matter flows in aquatic systems come through barriers to living matter and bottom sediments.
Review
For citations:
Nemirovskaya I.A., Khaustov A.P., Redina M.M. The Role of PAHs as an Indicator of the Geochemical Barriers’ Functioning in the Marginal Filter of the Northern Dvina River. Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2020;(1):80-92. (In Russ.) https://doi.org/10.31857/S2587556620010148
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