Mercury species in formerly contaminated soils and released soil gases

0474577 - ÚJF 2018 RIV NL eng J - Journal Article
Sysalová, J. - Kučera, Jan - Drtinová, B. - Červenka, R. - Zvěřina, O. - Komárek, J. - Kameník, Jan
Mercury species in formerly contaminated soils and released soil gases.
Science of the Total Environment. Roč. 584, APR (2017), s. 1032-1039. ISSN 0048-9697. E-ISSN 1879-1026
R&D Projects: GA ČR(CZ) GBP108/12/G108; GA MŠMT LM2015056
Institutional support: RVO:61389005
Keywords : mercury contaminated soils * total mercury * elemental mercury * methylmercury * phynelmercury * gaseous elemental mercury
OECD category: Analytical chemistry
Impact factor: 4.610, year: 2017

otal mercury (T-Hg), elemental mercury (Hg-0), methylmercury (MeHg+), phenylmercury (PhHg+), and gaseous elemental mercury (GEM) species were determined in soils formerly contaminated by different processes from two sites in the Czech Republic. Analytical methods involved atomic absorption spectrometry (AAS) using a single-purpose Advanced Mercury Analyser AMA-254 and radiochemical neutron activation analysis (RNAA) for T-Hg determination, a thermal desorption method was used for Hg-0 determination, gas chromatography coupled with atomic fluorescence spectrometry (GC-AFS) was employed for assay of MeHg+ and PhHg+, while GEM measurement was carried out using a portable Zeeman AAS device Lumex RA-915(+). The first sampling site was in the surroundings of a former PhHgCl-based fungicide processing plant next to Pribram (central Bohemia). Although the use of Hg-based fungicides as seed mordant have been banned, and their production stopped at the end of 1980's, highly elevated Hg contents in soil are still observed in the vicinity of the former plant, reaching T-Hg values >13 mg kg(-1). The second sampling site was an abandoned mining area named Jedova hora Hill near Horovice (central Bohemia), where cinnabar (HgS) was occasionally mined as by-product of Fe ores hematite and siderite. Mining activities have been stopped here in 1857. Very high contents of T-Hg are still found at this site, up to 144 mg kg(-1). In most cases we found a statistically significant correlation between T-Hg and Hg-0 values regardless of the pollution source. On the contrary, insignificant correlation was observed neither between T-Hg and GEM values, nor between GEM and Hg. Concentrations of the investigated organomercury species were above a limit of detection (LOD) only in the most contaminated samples, where their levels were about two to three orders of magnitude lower compared to those of T-Hg.
Permanent Link: http://hdl.handle.net/11104/0271597