Mobility of mercury in soil and its transport into the sea

Karolina Gębka , Dominika Saniewska , Magdalena Bełdowska

Abstract

Mercury (Hg) is deposited temporarily in soil and can be remobilised into rivers and seas. Given that rivers are a significant part of the mercury budget in the southern Baltic region (inland sea located in northern Europe) and meteorological changes (e.g. intense rain, drought) are observed more frequently, it is important to recognize the factors affecting the cycling of bioavailable Hg forms. The aim of this study was to identify the processes influencing the changes of labile and stabile mercury proportion in soil and the potential impact on the outflow of labile Hg into fluvial systems. For this purpose, soil samples, river sediments, and river water were collected from the Reda River (southern Baltic Sea catchment area) during the 2015 hydrologic year. The material was analysed for total and particulate mercury content and Hg forms, by a thermo-desorption method. The analysis showed that due to changes of meteorological and hydrological conditions Hg can enter rivers and then be introduced into the marine environment in various forms. On the one hand due to high precipitation events washing out of labile (i.e. bond with halogenides, MeHg, HgSO4), Hg forms into the river can be enhanced which affects increasing of availability of the most dangerous Hg form in the water systems. On the other hand the same event can cause the limitation of bioavailable mercury forms by a conversion of labile Hg into the most stable one (HgSO4 ➔ HgS) under anaerobic conditions.
Publication typeIn press (online first, early view)
Author Karolina Gębka (FOG/IO/DMChEP)
Karolina Gębka,,
- Division of Marine Chemistry and Environmental Protection
, Dominika Saniewska (FOG/IO/DMChEP)
Dominika Saniewska,,
- Division of Marine Chemistry and Environmental Protection
, Magdalena Bełdowska (FOG/IO/DMChEP)
Magdalena Bełdowska,,
- Division of Marine Chemistry and Environmental Protection
Journal seriesEnvironmental Science and Pollution Research, ISSN 0944-1344, e-ISSN 1614-7499, (N/A 70 pkt)
Issue year2020
Noonline first
Pages1-15
Publication size in sheets0.70
Keywords in EnglishHg, transformation, river, soil, fractionation
ASJC Classification2700 General Medicine; 2304 Environmental Chemistry; 2307 Health, Toxicology and Mutagenesis; 2310 Pollution
DOIDOI:10.1007/s11356-019-06790-8
URL https://link.springer.com/content/pdf/10.1007/s11356-019-06790-8.pdf
Languageen angielski
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 02-03-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.032; WoS Impact Factor: 2018 = 2.914 (2) - 2018=3.208 (5)
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