Chemical characteristics of dissolved mercury in the pore water of Minamata Bay sediments

Matsuyama, Akito; Yano, Shinichiro; Taninaka, Takaaki; Kindaichi, Michiaki; Sonoda, Ikuko; Tada, Akio; Akagi, Hirokatsu

doi:10.1016/j.marpolbul.2017.10.021

Cited by 28 publications

(9 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The liquid-phase Hg in the sediment porewaters of the FMB (0.11 to 1.40 µg/L) was higher than reported data from other lakes (7.58 to 19.70 ng/L), estuaries (6.62 to 4.68 ng/L), and rivers (19 to 56 ng/L in the Toce River, Italy; 0.4 to 6.63 ng/L in the South River, VA, USA) [74][75][76][77]. We think the high THg levels in the porewaters might be related to reduced sulfur groups in the dissolved organic matter (DOM).…”

Section: Mercury Deposition In the Sedimentcontrasting

confidence: 52%

Mercury Accumulation in a Stream Ecosystem: Linking Labile Mercury in Sediment Porewaters to Bioaccumulative Mercury in Trophic Webs

Bryan

Parks

et al. 2022

Water

View full text Add to dashboard Cite

Mercury (Hg) deposition and accumulation in the abiotic and biotic environments of a stream ecosystem were studied. This study aimed to link labile Hg in porewater to bioaccumulative Hg in biota. Sediment cores, porewaters, and biota were sampled from four sites along the Fourmile Branch (SC, USA) and measured for total Hg (THg) and methyl-Hg (MHg) concentrations. Water quality parameters were also measured at the sediment–water interface (SWI) to model the Hg speciation. In general, Hg concentrations in porewaters and bulk sediment were relatively high, and most of the sediment Hg was in the solid phase as non-labile species. Surface sediment presented higher Hg concentrations than the medium and bottom layers. Mercury methylation and MHg production in the sediment was primarily influenced by sulfate levels, since positive correlations were observed between sulfate and Hg in the porewaters. The majority of Hg species at the SWI were in non-labile form, and the dominant labile Hg species was complexed with dissolved organic carbon. MHg concentrations in the aquatic food web biomagnified with trophic levels (biofilm, invertebrates, and fish), increasing by 3.31 times per trophic level. Based on the derived data, a modified MHg magnification model was established to estimate the Hg bioaccumulation at any trophic level using Hg concentrations in the abiotic environment (i.e., porewater).

show abstract

Section: Mercury Deposition In the Sedimentcontrasting

confidence: 52%

Mercury Accumulation in a Stream Ecosystem: Linking Labile Mercury in Sediment Porewaters to Bioaccumulative Mercury in Trophic Webs

Bryan

Parks

et al. 2022

Water

View full text Add to dashboard Cite

show abstract

“…The results of multiple regression analyses indicated that T , MC, and LOI in sediment were major factors controlling diffusion rate of Hg between sediment and water (Table S6). The positive relationship between T and diffusion rate of Hg may be due to the intense benthic activities (e.g., bioturbation) in the surface sediment , and increasing Hg solubility at higher temperature. A higher moisture content in sediment could promote the dissolution of Hg and, subsequently, enhances the diffusion process .…”

Section: Resultsmentioning

confidence: 99%

“…The positive relationship between T and diffusion rate of Hg may be due to the intense benthic activities (e.g., bioturbation) in the surface sediment , and increasing Hg solubility at higher temperature. A higher moisture content in sediment could promote the dissolution of Hg and, subsequently, enhances the diffusion process . Higher concentrations of organic matters could facilitate the adsorption of Hg in the sediment, sequester more Hg in the sediment, and thus, inhibit the diffusion of Hg from the sediment to the overlying water .…”

Section: Resultsmentioning

confidence: 99%

Mass Budget of Mercury (Hg) in the Seawater of Eastern China Marginal Seas: Importance of the Sediment–Water Transport Processes

Chen

Liu²,

Yin

et al. 2022

Environ. Sci. Technol.

View full text Add to dashboard Cite

The Eastern China Marginal Seas (ECMS) have been facing a variety of environmental problems, including mercury (Hg) pollution. Although several previous studies have been focused on mass balance of Hg in the ECMS, the contribution of Hg transport at the sediment–water interface remains unclear. This study was aimed to access and quantify the importance of sediment–water transport processes in Hg cycling. Significantly positive correlations were observed between Hg concentrations in the overlying and bottom water and the diffusion rates of Hg from sediment to the water. Approximately 2–3 times higher of THg concentrations in the entire water column were observed in a winter cruise with strong waves which was supposed to strengthen the resuspension process. The mass budget of Hg in the ECMS further showed that diffusion and resuspension processes accounted for approximate 46%, 60%, and 16% of total input Hg in the BS, YS, and ECS, respectively. These results suggest that the sediment–water transport processes play an important role in Hg cycling in the ECMS. As an important “pool” of Hg in the ECMS, the transport of Hg at the sediment–water interface may affect the long-term risk assessment of Hg in these systems.

show abstract

“…In aquatic bodies, element geochemical cycles can be better understood through studies of the chemical composition of pore water that fills spaces between solid particles of bottom sediments 5 , 6 . Elemental composition of the pore water trapped in sediments can be used to study the conditions of matter circulation and its exchange between the bottom sediments and overlying water 7 , 8 . Pore water chemistry has proved to be a sensitive indicator of diagenetic transformations of bottom sediments, even when changes in their chemical characteristics may not be noticeable 9 .…”

Section: Introductionmentioning

confidence: 99%

Hydrochemistry of sediment pore water in the Bratsk reservoir (Baikal region, Russia)

Poletaeva

Tirskikh

Pastukhov

2021

Sci Rep

View full text Add to dashboard Cite

This study aimed to identify the factors responsible for the major ion composition of pore water from the bottom sediments of the Bratsk water reservoir, which is part of the largest freshwater Baikal-Angara water system. In the Bratsk reservoir, the overlying water was characterized as HCO3–Ca–Mg type with the mineralization ranging between 101.2 and 127.7 mg L−1 and pore water was characterized as HCO3–SO4–Ca, SO4–Cl–Ca–Mg and mixed water types, which had mineralization varying from 165.9 to 4608.1 mg L−1. The ionic composition of pore waters varied both along the sediment depth profile and across the water area. In pore water, the difference between the highest and lowest values was remarkably large: 5.1 times for K+, 13 times for Mg2+, 16 times for HCO3−, 20 times for Ca2+, 23 times for Na+, 80 times for SO42−, 105 times for Cl−. Such variability at different sites of the reservoir was due to the interrelation between major ion concentrations in the pore water and environmental parameters. The major factor responsible for pore water chemistry was the dissolution of sediment-forming material coming from various geochemical provinces. In the south part of the reservoir, Cl−, Na+ and SO42− concentrations may significantly increase in pore water due to the effect of subaqueous flow of highly mineralized groundwater.

show abstract

Chemical characteristics of dissolved mercury in the pore water of Minamata Bay sediments

Cited by 28 publications

References 15 publications

Mercury Accumulation in a Stream Ecosystem: Linking Labile Mercury in Sediment Porewaters to Bioaccumulative Mercury in Trophic Webs

Mercury Accumulation in a Stream Ecosystem: Linking Labile Mercury in Sediment Porewaters to Bioaccumulative Mercury in Trophic Webs

Mass Budget of Mercury (Hg) in the Seawater of Eastern China Marginal Seas: Importance of the Sediment–Water Transport Processes

Hydrochemistry of sediment pore water in the Bratsk reservoir (Baikal region, Russia)

Contact Info

Product

Resources

About