Mercury in the surface water of Swedish forest lakes —concentrations, speciation and controlling factors

Meili, Markus; Iverfeldt, Åke; Håkanson, Lars

doi:10.1007/bf00342290

Cited by 81 publications

(47 citation statements)

References 23 publications

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“…This view is also supported by the inverse relationship between colour and water residence time (Fig. 4, Table 1) and by the temporary increase of colour in lakes during periods of high water flow (Meili et al, 1991). In temperate lakes, the correlation of autochthonous production with the concentration or the availat Carlsol oligoht tion in humic transpc carbon lake.…”

Section: Phosphorus Content Of Organic Mattersupporting

confidence: 59%

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Sources, concentrations and characteristics of organic matter in softwater lakes and streams of the Swedish forest region

Meili

1992

Hydrobiologia

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101

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Abstract18 Swedish forest lakes covering a wide range of dystrophy were studied in order to quantify and characterize the organic matter in the water with respect to origin (allochthonous or autochthonous), physical state (particulate or dissolved) and phosphorus content. Samples were collected repeatedly during a two-year period with unusually variable hydrological conditions. Water from three different depths and from tributaries was analysed with standard monitoring methods, including water colour, Secchi disk transparency, total organic carbon (TOC), CODen COD Mm total phosphorus and molybdate reactive phosphorus. Interrelationships were used to compare different methods and to asscss the concentration and composition of organic matter. It is estimated that in remote softwater lakes of the Swedish forest region, autochthonous carbon is typically < 5 g m -3. Most lakes in this region receive significant amounts of humic matter originating from coniferous forest soils or peatland in the catchment area. In most humic lakes with a water colour of ~ 50 g Pt m -3, more than half of the organic carbon in the surface water is of allochthonous origin, and in polyhumic lakes (> 200 g Pt m -3) the proportion can exceed 90%. Secchi depth readings were related similarly to organic matter from both sources and provided good estimates of TOC with a single optical measurement. Water colour was used to distinguish allochthonous and autochthonous matter. High concentrations of phosphorus were found in humic waters, most of it being molybdate reactive, and probably associated with humic matter rather than as dissolved free inorganic forms. CODMn yielded only 25-60% of TOC and appears to include mainly truly dissolved substances of low molecular weight.

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Section: Phosphorus Content Of Organic Mattersupporting

confidence: 59%

“…Both hydrology and water chemistry were unusually variable during the study period, especially in central Sweden, where the theoretical water residence time repeatedly dropped from several months to a few days in many lakes (cf. Meili et al, 1991).…”

Section: Methodsmentioning

confidence: 99%

Sources, concentrations and characteristics of organic matter in softwater lakes and streams of the Swedish forest region

Meili

1992

Hydrobiologia

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101

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“…Strohol (1970) found that the bond of HA with Hg(II) is much stronger than that of Fe(III), AI(III), Mn(II) and La(II) etc. Humic substances can affect the fate of Hg in natural water system (Meili et al, 1991;Morrison and Therien, 1991).…”

Section: Introductionmentioning

confidence: 99%

Effects of humic acid on transport and transformation of mercury in soil-plant systems

Wang

Chang-le

Guo

et al. 1997

Water Air Soil Pollut

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Abstract. The influence of humic acid (HA) on the transport and transformation of mercury (Hg) in soil was studied. No available Hg could be detected (<2.5 #g kg-t ) in alluvial soil when the content of HA-carbon (HA-C) was higher than 0.2 g kg-i although a large amount of Hg (8 Itg kg-i ) was applied to the soil. The available Hg decreased with the increase of HA in purple soil (r=0.735). There are significant correlations between HA concentration and organic Hg in the tested soils (1-=-0.974 for the purple soil and r=-0.979 for the alluvial soil). The increase of HA results in decrease of Hg absorbed by plant from the soil. A loss of Hg from soil caused by microbes was observed.

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“…Lakes draining forested glaciated regions of North America and Europe have been affected by atmospheric Hg deposition (Meili et al 1991;Kamman et al 2005). Watershed attributes strongly influence the role of lakes in the transport and transformations of Hg.…”

mentioning

confidence: 99%

Mercury dynamics and transport in two Adirondack Lakes

Selvendiran

Driscoll

Montesdeoca

et al. 2009

Limnology & Oceanography

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We investigated the chemistry and fluxes of mercury (Hg) species for two Adirondack lakes with contrasting landscape, physical, and chemical attributes. Samples were collected monthly at the lake inlets and outlets over 2 yr, and evasion of elemental Hg was measured at one lake (Arbutus). Concentrations of total Hg (THg) and methyl Hg (MeHg) in watershed runoff were highly variable throughout the year, increasing markedly during summer months. The proportion of THg as MeHg ranged from ,5% at Arbutus Lake up to 10% at Sunday Lake. Concentrations of Hg species increased with increases in dissolved organic carbon concentrations and percentage wetland coverage. The estimated rate of volatilization loss of elemental mercury (Hg o ) from Arbutus Lake surface (7.8 mg m 22 yr 21 ) was comparable to the rate of direct atmospheric Hg deposition to the lake surface (8.6 mg m 22 yr 21 ). Dry deposition to Arbutus Lake amounted to ca. 26% of total wet THg deposition. Hydraulic residence time (HRT) played a critical role in controlling Hg dynamics in the lakes. Negligible removal of THg inputs was observed at Sunday Lake, which has a short HRT (0.02 yr), compared with approximately 60% removal at Arbutus Lake, which has a longer HRT (0.6 yr). This pattern of increasing net Hg retention in lakes with increasing HRT was consistent with other mass balance studies in the literature. Both Arbutus and Sunday lakes were net sinks of MeHg.

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Mercury in the surface water of Swedish forest lakes —concentrations, speciation and controlling factors

Cited by 81 publications

References 23 publications

Sources, concentrations and characteristics of organic matter in softwater lakes and streams of the Swedish forest region

Sources, concentrations and characteristics of organic matter in softwater lakes and streams of the Swedish forest region

Effects of humic acid on transport and transformation of mercury in soil-plant systems

Mercury dynamics and transport in two Adirondack Lakes

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