Environmental Research ( IF 8.3 ) Pub Date : 2020-03-08 , DOI: 10.1016/j.envres.2020.109355 Karolina Gębka 1 , Magdalena Bełdowska 1 , Dominika Saniewska 1 , Ewa Korejwo 1 , Michał Saniewski 2
Mercury (Hg) is recognized as a global pollutant, which can be transported to the sea by suspended particulate matter (SPM) via rivers constituting the main source of mercury in the southern Baltic sea. The aim of the present study was to characterize the mercury fractions in suspended particulate matter, as well as the transformations of Hg during its riverine transportation into the sea. The thermo-desorption method was used to determine the labile and stable mercury fractions in SPM of rivers (Reda, Zagórska Struga, Gizdepka, Płutnica) within the Baltic Sea basin. In this paper six “periods” were designated (heating, non-heating, drought, rains, downpour/flood and thaws), during which the river suspended particulate matter was enriched with various fractions of mercury. Meteorological and hydrological phenomena such as downpours and thaws intensified surface runoff, causing an increase in the share of Hgabs and Hgads1 mercury fractions in suspended particulate matter. Whereas, droughts contributed to the formation of HgS in a large river and to an inflow of adsorbed Hg in smaller rivers decrease of air temperature leads to increase of fossil fuel combustion and then increases the share of adsorbed Hg (mainly bound with halides) in riverine particulate matter. In the non-heating season, the main fraction was the mercury absorbed inside organic matter.
中文翻译:
气象现象是控制河流中不稳定的颗粒汞及其流入海洋沿海地区的主要因素。
汞(Hg)被认为是一种全球污染物,可以通过悬浮颗粒物(SPM)经由构成波罗的海南部主要汞源的河流运到海中。本研究的目的是表征悬浮颗粒物中的汞含量,以及汞在河中向海中运输过程中的转化。热解吸法用于确定波罗的海流域内河流(Reda,ZagórskaStruga,Gizdepka,Płutnica)的SPM中不稳定和稳定的汞含量。在本文中,指定了六个“时期”(加热,不加热,干旱,下雨,倾盆大雨/融化和融化),在此期间,河流中悬浮的颗粒物富含各种汞。悬浮颗粒物中的abs和Hg ads1汞部分。干旱导致大河中HgS的形成以及小河中Hg的流入,气温下降导致化石燃料燃烧增加,然后河中Hg(主要与卤化物结合)的份额增加颗粒物。在非供暖季节,主要成分是有机物内部吸收的汞。