Application of three-dimensional mercury cycling model to coastal seas

Rajar, Rudi; Žagar, Dušan; Četina, Matjaž; Hirokatsu, Akagi; Yano, Shinichiro; Tomiyasu, Takashi; Horvat, Milena

doi:10.1016/j.ecolmodel.2003.08.001

Cited by 37 publications

(26 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These results suggest that the migration of mercury from Minamata bay has declined after the dredging project was completed in 1990. It was shown that Minamata bay represents an insignificant source of mercury to the Yatsushiro Sea in recent years (Rajar et al 2004). In the middle Yatsushiro Sea, mercury residues have also decreased in sediments at Sts.…”

Section: Resultsmentioning

confidence: 99%

“…Rifardi et al (1998) investigated the distribution pattern of mercury content in some layers of sediment cores from the South Yatsushiro Sea, and suggested that the sediment polluted with mercury was transported both northeastward and southward from the Minamata bay in the southern Yatsushiro Sea. Further, the pollutant-transport models, analyzing the mass-balance of mercury in Minamata bay and Yatsushiro Sea, estimated that the total outflow of mercury into the Yatsushiro Sea would be approximately 150 kg Hg per year (Rajar et al 2004). However, most of these studies had examined either Minamata bay region or the southern part of the Yatsushiro Sea, and little information is available on mercury concentrations and distribution in throughout the sea including northern locations.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Concentrations and Distribution of Mercury and Other Heavy Metals in Surface Sediments of the Yatsushiro Sea including Minamata Bay, Japan

Nakata

Shimada

Yoshimoto

et al. 2007

Bull Environ Contam Toxicol

View full text Add to dashboard Cite

The concentrations and distribution of heavy metals, such as mercury, zinc, copper, lead, and iron in surface sediments from 234 stations of the Yatsushiro Sea including Minamata bay were investigated. High concentrations of mercury were found in sediments from Minamata bay and its vicinity, but the levels decreased gradually with distance from the bay. The concentrations of mercury in sediments decreased gradually from south to north of the Yatsushiro Sea. These imply the lack of movement of mercury from Minamata bay to the northern Yatsushiro Sea. The geographical profiles of zinc and copper were contrary to that found for mercury, indicating the presence of natural and anthropogenic sources of copper and zinc in the northern Yatsushiro Sea.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Concentrations and Distribution of Mercury and Other Heavy Metals in Surface Sediments of the Yatsushiro Sea including Minamata Bay, Japan

Nakata

Shimada

Yoshimoto

et al. 2007

Bull Environ Contam Toxicol

View full text Add to dashboard Cite

show abstract

“…Most studies published so far have focused on the chemical behavior and migration of sediment in the bay. Rajar et al (2004) Fig. 1 Seawater sampling sites in Minamata Bay tion.…”

mentioning

confidence: 99%

Mercury Speciation in the Water of Minamata Bay, Japan

Matsuyama

Eguchi

Sonoda

et al. 2010

Water Air Soil Pollut

Self Cite

View full text Add to dashboard Cite

The speciation of mercury (Hg) in Minamata Bay (Japan) was studied over a 2-year period (2006)(2007)(2008). Concentrations of dissolved total Hg, dissolved methylmercury (MeHg), particulate total Hg, and suspended solids were 0.43±0.14 ng/l (mean±standard deviation), 0.10±0.06 ng/l, 3.04±2.96 ng/l, and 5.94± 2.10 mg/l, respectively. Correlations between concentrations of particulate total Hg and suspended solids at four depths (surface: 0 m; mid-depth: −6 m, −10 m; and bottom +1 m layer) were only significant in the bottom +1 m layer. The mean dissolved MeHg concentration and the ratio of dissolved MeHg to dissolved total Hg were considerably higher in summer compared to other seasons. The data suggest that bottom sediment was not the sole source of MeHg, and that MeHg may be produced in the water column by the conversion of divalent Hg eluted from resuspended bottom sediment. The correlation between seawater characteristics such as salinity, temperature, dissolved oxygen (DO), and dissolved MeHg concentration indicates that Hg methylation could be influenced by the heterotrophic activity of microorganisms in the seawater. In particular, inverse correlations were observed between DO, salinity, and MeHg concentration. However, dissolved MeHg concentrations did not correlate with seawater characteristics such as pH or chlorophyll-a.

show abstract

“…The model was used for computation of circulation, transport of dissolved and particulate pollutants, and basic mercury transformations in the northern Adriatic Sea, the entire Mediterranean and Minamata Bay (Četina, 1992;Rajar & Četina, 1997;Četina et al, 2000;Rajar et al, 2000;Rajar et al, 2004;Kovšca, 2007;Žagar et al, 2007). Simulations of sediment re-suspension, transport and deposition were also carried out using the model (Žagar, 1999;Rajar et al, 2000).…”

Section: The Pcflow3d Modelmentioning

confidence: 99%

Spatial distribution of suspended solids during short-term high river discharge in the Bay of Koper, northern Adriatic Sea

Mandac

Žagar

2018

Medit. Mar. Sci.

Self Cite

View full text Add to dashboard Cite

The Bay of Koper (BoK) located in the Gulf of Trieste (northern Adriatic Sea) is subject to a variety of anthropogenic influences; pollutants from inland are transported to the sea by the local rivers. The impact of high river discharge on suspended solids distribution was assessed by analysing results of an extensive measurement campaign conducted during two episodes of river flooding. The spatial analysis demonstrated the area influenced by fresh water and the distribution of inorganic suspended solids (ISS). The results were then used to calibrate the PCFLOW3D model and to simulate two episodes. A correlation was identified between the measurements and short-term simulations found in the central part of the bay. The results confirm the methods and the model used in this study to be appropriate for studying complex suspended solids processes in coastal areas.

show abstract

Application of three-dimensional mercury cycling model to coastal seas

Cited by 37 publications

References 37 publications

Concentrations and Distribution of Mercury and Other Heavy Metals in Surface Sediments of the Yatsushiro Sea including Minamata Bay, Japan

Concentrations and Distribution of Mercury and Other Heavy Metals in Surface Sediments of the Yatsushiro Sea including Minamata Bay, Japan

Mercury Speciation in the Water of Minamata Bay, Japan

Spatial distribution of suspended solids during short-term high river discharge in the Bay of Koper, northern Adriatic Sea

Contact Info

Product

Resources

About