The role of pahs as an indicator of the geochemical barriers functioning in the marginal filter of the northern dvina river

• Published in: Izvestiya Rossiiskoi akademii nauk. Seriya geograficheskaya
• Main Authors: Nemirovskaya I.A., Khaustov A.P., Redina M.M.
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Российская академия наук, Институт географии РАН
• Subjects: Bottom sediments; Geochemical barrier; Ice; Marginal filter; Polycyclic aromatic hydrocarbons (PAHs); Seston; Snow; Suspended matter; dvina
• Online Access: https://repository.rudn.ru/records/article/record/72746/

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. © 2020 Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. All rights reserved.