Monitoring And Disperse-Phase Distribution Of Polychlorinated Biphenyls In Natural Water

Abstract

This article presents the characteristic of contamination of natural water from Dnieper River in Kiev region by polychlorinated biphenyls (PCBs) on the results of the investigations, that were carried out during the period between 2011 and 2013 years. Total concentration of PCBs (29 congeners) ranged from 2.8 to 57.2 ng/dm 3. These pollution levels were not high compared with other world's major rivers. Meanwhile, the predominance of congeners with number of chlorine atoms from 4 to 6 was recorded. Its proportion accounted for 74-99 % of total content of PCBs. It was shown that about half of PCBs is associated with suspended particles: 20-31 %-at thin and 22-32 %-at rough fractions. 42-55 % of PCBs are contained in water phase. Disperse-phase distribution of individual congeners depends on number of chlorine atoms in the molecule. The higher this number the lower water-soluble part of congener.

Concentrations and regularities of disperse-phase distribution of organochlorine pesticides, polychlorinated biphenyls and polycyclic aromatic hydrocarbons in natural water

“…A significant part of the results on monitoring of OCPs, PCBs, and PAHs in surface water of the Dnieper River was obtained during the period 2011-2013. These results are presented in papers [19][20][21][22] . In 2014-2019 this research was continued.…”

“…They were also located up the River opposite Vyshgorod and at the Desna River's confluence into the Dnieper River. Sampling schemes are given in papers 20,23 .…”

“…In recent years, investigations on monitoring and disperse-phase distribution of POPs in the Dnieper River's surface water [19][20][21][22] were carried out. By the term "disperse-phase distribution" distribution of POPs between water phase (water-soluble state), the fine fraction of suspended particulate matter (SPM) (pore size >0,45 and <16-24 µm) and the rough fraction of SPM (>16-24 µm) was meant.…”