Grain-size dependence of mercury speciation in river suspended matter, sediments and soils in a mercury mining area at varying hydrological conditions

Baptista-Salazar, Carluvy; Richard, Jan-Helge; Horf, Michael; Rejc, Mateja; Gosar, Mateja; Biester, Harald

doi:10.1016/j.apgeochem.2017.04.006

Cited by 36 publications

(23 citation statements)

References 43 publications

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“…The positive correlation between terrestrial DOM and THg concentration in boreal rivers and streams has been previously reported in the literature (Brigham et al, 2009;Eklöf et al, 2012). As atmospheric Hg deposition during the industrial era have led to the accumulation of Hg in organic rich soils (Johansson and Tyler, 2001), the remobilization of Hg-enriched soil OM is an important process controlling THg concentrations in streams (Baptista-Salazar et al, 2017;Brigham et al, 2009;Driscoll et al, 1995;Eklöf et al, 2012;Kirk and Louis, 2009;Tsui et al, 2009) and lakes (Bravo et al, 2017).…”

Section: Terrestrial Dom: An Important Source Of Thg In European Runnsupporting

confidence: 58%

“…Our results provide new information on THg and MeHg concentrations in streams at a European scale. THg concentrations across the studied European running waters were in the same range as those measured in pristine streams of northern Sweden (Eklöf et al, 2012), USA (Oregon, Wisconsin and Florida, Brigham et al, (2009); California, Tsui et al, (2009) and Minnesota, Balogh et al, (2002)) and France (Cavalheiro et al, 2016) and were lower than those reported for rivers typically contaminated by point sources (Baptista-Salazar et al, 2017;Bravo et al, 2014). Therefore, none of the study sites appeared to be affected by point sources of Hg.…”

Section: Hg Levels In European Running Waterssupporting

confidence: 55%

“…Without considering point source of contamination, such as chlor-alkali or mining activities, known to increase stream Hg concentrations, the estimated European river discharge of THg T and MeHg T would be 1426 kg year -1 (IQR: 868 -2494) and 97 kg year -1 (IQR: 60 -254), respectively. Particles are an important vector of Hg transport in streams (Schuster et al, 2011) and can influence hydrologically mediated processes such as sedimentation and/or remobilization (e.g heavy rain events) of Hg previously deposited within river systems, which can largely affect THg T and MeHg T loads (Baptista-Salazar et al, 2017;Moreno-Brush et al, 2016;Sunderland and Mason, 2007).…”

Section: Hg Levels In European Running Watersmentioning

confidence: 99%

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The interplay between total mercury, methylmercury and dissolved organic matter in fluvial systems: A latitudinal study across Europe

et al. 2018

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Large-scale studies are needed to identify the drivers of total mercury (THg) and monomethyl-mercury (MeHg) concentrations in aquatic ecosystems. Studies attempting to link dissolved organic matter (DOM) to levels of THg or MeHg are few and geographically constrained. Additionally, stream and river systems have been understudied as compared to lakes. Hence, the aim of this study was to examine the influence of DOM concentration and composition, morphological descriptors, land uses and water chemistry on THg and MeHg concentrations and the percentage of THg as MeHg (%MeHg) in 29 streams across Europe spanning from 41°N to 64 °N. THg concentrations (0.06-2.78 ng L) were highest in streams characterized by DOM with a high terrestrial soil signature and low nutrient content. MeHg concentrations (7.8-159 pg L) varied non-systematically across systems. Relationships between DOM bulk characteristics and THg and MeHg suggest that while soil derived DOM inputs control THg concentrations, autochthonous DOM (aquatically produced) and the availability of electron acceptors for Hg methylating microorganisms (e.g. sulfate) drive %MeHg and potentially MeHg concentration. Overall, these results highlight the large spatial variability in THg and MeHg concentrations at the European scale, and underscore the importance of DOM composition on mercury cycling in fluvial systems.

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Section: Terrestrial Dom: An Important Source Of Thg In European Runnsupporting

confidence: 58%

Section: Hg Levels In European Running Waterssupporting

confidence: 55%

Section: Hg Levels In European Running Watersmentioning

confidence: 99%

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The interplay between total mercury, methylmercury and dissolved organic matter in fluvial systems: A latitudinal study across Europe

et al. 2018

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“…Stronger accumulation of Hg relative to C in mineral horizons in the north (Tazovsky , Fig. 4) may be linked to the clay nature of mineral layers (Roulet et al, 1998;Baptista-Salazar et al, 2017) in these regions (Table S1) but also to the presence of specific host phases of Hg (see examples of peat minerals in Rudmin et al, 2018). Dissolved oxygen measurements in soil porewaters at the Tazovsky site indicate that mineral gleysoils and peat histosols, which often overlay former lake sediments, are anoxic .…”

Section: Hg Association With Other Elements In Peatmentioning

confidence: 99%

“…The Hg host phases in these soils are therefore likely sulfide minerals. Indeed, known Hg carriers in peat deposits are Fe and Zn sulfide minerals or organic-bound sulfide functional groups (Smieja-Król et al, 2010;Prietzel et al, 2009;Skyllberg et al, 2003, Bates et al, 1998Steinmann and Shotyk, 1997).…”

Section: Hg Association With Other Elements In Peatmentioning

confidence: 99%

A revised northern soil Hg pool, based on western Siberia permafrost peat Hg and carbon observations

Lim

Jiskra

Sonke

et al. 2020

Preprint

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Abstract. Natural and anthropogenic mercury (Hg) emissions are sequestered in terrestrial soils over short, annual, to long, millennial time scales, before Hg mobilization and run-off impacts wetland and coastal Ocean ecosystems. Recent studies have used Hg to carbon (C) ratios, RHgC, measured in Alaskan permafrost mineral and peat soils, together with a northern soil carbon inventory, to estimate that these soils contain large amounts, 184 to 755 Gg of Hg in the upper 1 m. However, measurements of RHgC on Siberian permafrost peatlands are largely missing, leaving the size of estimated northern soil Hg budget, and its fate under arctic warming scenarios uncertain. Here we present Hg and carbon data for 6 peat cores, down to mineral horizons at 1.5–4 m depth, across a 1700 km latitudinal (56 to 67° N) permafrost gradient in the Western Siberian lowlands (WSL). Hg concentrations increase from south to north in all soil horizons, reflecting enhanced net accumulation of atmospheric gaseous Hg by the vegetation Hg pump. The RHgC in WSL peat horizons decreases with depth from 0.38 Gg Pg−1 in the active layer to 0.23 Gg Pg−1 in continuously frozen peat of the WSL. We estimate the Hg pool (0 1 m) in the permafrost-affected part of WSL peatlands to be 9.3 ± 2.7 Gg. We review and estimate pan-arctic organic and mineral soil RHgC to be 0.19 and 0.77 Gg Pg−1, and use a soil carbon budget to revise the northern soil Hg pool to be 67 Gg (37–88 Gg, interquartile range (IQR)) in the upper 30 cm, 225 Gg (102–320 Gg) in the upper 1 m, and 557 Gg (371–699 Gg) in the upper 3 m. Using the same RHgC approach, we revise the global upper 30 cm soil Hg pool to contain 1078 Gg of Hg (842–1254 Gg, IQR), of which 6 % (67 Gg) resides in northern permafrost soils. Additional soil and river studies must be performed in Eastern and Northern Siberia to lower the uncertainty on these estimates, and assess the timing of Hg release to atmosphere and rivers.

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Can Sediments Contaminated by Mining be a Source of Mercury in the Coastal Environment Due to Dredging? Evidence from Thermo-Desorption and Chemical Speciation

Covelli

Petranich

Pavoni

et al. 2021

Bull Environ Contam Toxicol

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The sediments in the Gulf of Trieste (northern Adriatic Sea, Italy) are contaminated by mercury (Hg) due to historic mining which took place in Idrija (Slovenia). Despite many studies having been done regarding Hg, no information is available on the potential impact of dredging required along the main channel approaching the Port of Monfalcone. Sixteen surface sediment samples were collected along the channel to determine both total Hg concentration and chemical species using the thermo-desorption (TD) technique. Six samples were also chosen to apply a selective sequential extraction (SSE). The TD technique showed the maximum Hg release approximately at 260 and 335°C, corresponding to metacinnabar (β-HgS) and cinnabar (α-HgS), respectively. The SSE demonstrated that Hg was mainly associated with poorly soluble or insoluble compounds (98.7%). A resuspension event over a limited period of time can be considered of negligible impact to the water column due to the scarce Hg mobility from sediments.

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Grain-size dependence of mercury speciation in river suspended matter, sediments and soils in a mercury mining area at varying hydrological conditions

Cited by 36 publications

References 43 publications

The interplay between total mercury, methylmercury and dissolved organic matter in fluvial systems: A latitudinal study across Europe

The interplay between total mercury, methylmercury and dissolved organic matter in fluvial systems: A latitudinal study across Europe

A revised northern soil Hg pool, based on western Siberia permafrost peat Hg and carbon observations

Can Sediments Contaminated by Mining be a Source of Mercury in the Coastal Environment Due to Dredging? Evidence from Thermo-Desorption and Chemical Speciation

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