Identification of matter flows in marginal filters of rivers (based on the principles of thermodynamics)

Aleksandr Khaustov,Margarita Redina,Inna Nemirovskaya,O Makarieva,D Post

doi:10.1051/e3sconf/202016306008

Aleksandr Khaustov, Margarita Redina + Show 3 more

Open Access

https://doi.org/10.1051/e3sconf/202016306008

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Abstract

Material and energy flows in the marginal filters of rivers identified based on the analyses of the environmental fate of polycyclic aromatic hydrocarbons (PAH): Anthracene (An), Phenanthrene (Phen), Naphthalene (Naph), Pyrene (Py), Fluoranthene (Flu), Chrysene (Chr), Benzo[a]pyrene (BaP), Perylene (Pl). Experimental data on the components of the aquatic system of the marginal filter of the Northern Dvina River allow us to consider the processes of phase transitions of PAHs at geochemical barriers (GCB). Based on the principles of thermodynamics, a phenomenological model of migration and the formation of the most persistent PAH associations on the barriers is formed. The predominant possibility of PAH migration on suspended material, including biota, is shown. The probability of PAH accumulation between the most important components of aquatic systems was assessed according to the conditions of their migration activity in various zones of the marginal filter. Active and passive PAHs were determined in terms of their migration and accumulation in the components of aquatic systems. The role of PAHs as a reliable indicator of thermodynamic processes, including the development of technogenesis, is estimated.

Highlights

Challenges in the development of modern hydrology as science are largely due to the insufficient development of the methodology for constructing models linking quantitative parameters of water resources and the formation of their quality
We propose to study these processes on the basis of the structural characteristics of the models identified in terms of thermodynamic parameters of flow geochemical markers
To identify processes in aquatic systems, we analyze the transformation of polycyclic aromatic hydrocarbons (PAH) flows on geochemical barriers (GCB) in the marginal filter system of the Northern Dvina river, a zone with a pronounced effect of technogenesis

Summary

Introduction

Challenges in the development of modern hydrology as science are largely due to the insufficient development of the methodology for constructing models linking quantitative parameters of water resources and the formation of their quality. Discussing the development of hydrological science, we must pay more attention to the development of integrated models in hydrology reflecting not the quantity of water and (sometimes in the first line) the qualitative characteristics. Water bodies have several sources of nutrition, which are characterized by an individual chemical composition. This makes it possible to build complex models using the basic principles of thermodynamics

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