Mikroelementy v vode reki Chernoy i otsenka ikh postupleniya s rechnym potokom v Sevastopol'skuyu bukhtu v zimniy sezon 2020 goda

Abstract

The aim of this work is to determine the ten trace elements content (V, Co, Ni, Cu, Zn, As, Se, Mo, Cd, Pb) in the Chernaya River water and evaluation of their income with the riverine inflow into Sevastopol Bay. The water was sampled in the winter season 2020 in the Baydar Valley and at the river mouth. It is shown that the main share of trace elements in the Chernaya River water is transferred in the composition of suspended particles. Concentrations in suspended matter for all trace elements were higher than their dissolved concentrations from 4 times for Mo to 1.5·104 for Pb. Dissolved concentrations of all the studied trace elements (except for Zn) appeared to be lower than the world averages in riverine waters. Concentrations of Cu, Zn, Pb and Cd in suspended matter exceeded both Clarkes in soils of Crimea and average values appeared in rivers of the world. The lack of correlation between the trace elements concentration in suspended matter and Clarkes in soils as well as the unevenness of their content along the river indicate the additional sources of trace elements entering the river water along with the washout from the catchment area. The estimations of dissolved and particulate trace elements entry with the riverine discharge into the Sevastopol Bay were carried out based on concentration and flow rates in January and February 2020. Excluding Zn and Mo, the trace elements inflow with the suspended matter exceeded their flux in dissolved phase from 1.3 to 14 times.