Journal of the Korean Society of Oceanography    Vol.33   No.4   pp.178-184  . Year.1998  
PDF
Distribution of Methyl Mercury in Sediments from Kyeonggi Bay, Namyang Bay, Chinhae Bay, and Lake Shihwa, Korea

Kyu-Tae Lee, Kurunthachalam Kannan, Won-Joon Shim, Chul-Hwan Koh

Department of Oceanography, Seoul National University, 213 Food Safety and Toxicity Building, Michigan State University, Chemical Oceanography Division, Korean Ocean Research and Development Institute
To elucidate contamination levels and distribution of methyl mercury (Me-Hg) in Korean coastal areas, 126 sediment samples were collected from Kyeonggi Bay, Namyang Bay, Chinhae Bay, and Lake Shihwa during 1995 - 1996, and the Me-Hg concentrations were determined by cold vapor atomic fluorescence spectrometry (CVAFS). Contamination levels of Me-Hg in sediments from Kyeonggi Bay, Namyang Bay, Chinhae Bay, and Lake Shihwa were 274±990, 108±24, 294±342, and 1080±760 pg/g, respectively. Concentrations of Me-Hg in sediments were significantly correlated with total organic carbon and sulfur contents, but were independent of mud contents and mean grain size. The highest concentration of Me-Hg (7100 pg/g) was observed at Incheon North Harbor (Site K19) in Kyeonggi Bay. This Me-Hg concentration was one or two orders of magnitude higher than those on other Kyeonggi Bay sediments were. The average concentration of Me-Hg in sediments from Lake Shihwa was higher than in those from other study areas. The three peaks of Me-Hg in sediments from Lake Shihwa was higher than in those from other study areas. The three peaks of Me-Hg concentrations were observed on three sites (S5, S6, and S10) in Lake Shihwa and gradually decreased in distance-dependent manner around these sites. High concentrations of Me-Hg at surface and 10-cm sediment depth in Chinhae Bay may be to higher rates of methylation process by active sulfate-reducing bacteria or higher concentrations of total mercury available to sulfate-reducing bacteria.


[Fig, Table]

[Reference]
Occurrence and transport of mercury within a small catchment area
  - Aastrup M., J. Johnson, E. Bringmark, I. Bringmark, A. Iverfeldt
  - Wet. Air Soil Pollut.    56   155-167 p   Year.1991
Formation of methylmercury in the marine sediment under in vitro conditions
  - Berdicevsky I., H. Shoyerman, S. Yanna
  - Environ. Res.    20   325-334 p   Year.1979
Environmental factors affecting mercury methylation in estarine sediment
  - Choi S. -C., R. Bartha
  - Bull. Environ. Contam. Toxicol.    53   805-812 p   Year.1994
Total mercury Me-Hg and sulfide in River Carron sediments
  - Craig P. J., P. A. Moreton
  - Mar. Pollut. Bull.    14   408-411 p   Year.1983
Sedimentation analysis
  - Galehouse J. S.
  - Procedures in Sedimentary Petrology, edited by Carver, R.E., Wiley Interscience, New York      69-94 p   Year.1971
Sulfate stimulation of mercury methylation in freshwater sediments
  - Gilmour C. C., E. A. Henry, R. Mitchell
  - Environ. Sci. Technol.    26   2281-2287 p   Year.1992
Comparison of distillation with other current isolation methods for the determination of Me-Hg compounds in low level environmental samples
  - Horvat M., N. S. Bloom, L. Liang
  - Part 1. Sediment. Anal. Chim. Acta    281   135-152 p   Year.1993
Influences of watershed characteristics on mercury levels in Wisconsin rivers
  - Hurley J. P., J. M. Benoit, C. L. Babiarz, M. M. Shafer, A. W. Andren, J. R. Sullivan, R. Hammond, D. A. Webb
  - Environ. Sci. Technol.    29   1867-1875 p   Year.1995
Sieve analysis
  - Ingram F. S.
  - Procedures in Sedimentary Petrology, edited by Carver, R.E., Wiley Interscience, New York      49-68 p   Year.1971
Measurement of methylmercury and mercury in runoff, lake and rain waters
  - Lee Y. H., A. Iverfeldt
  - Wat. Air Soil Pollut.    56   309-321 p   Year.1991
Contamination level and characterstic distribution of PCBs in sediments from the west coast of Korea
  - Lee K. T., S. Tanabe, C. H. Koh
  - Methodologies for the Quality Assessment of Benthic Environment of Korean Coastal Waters. 1st Year Report, edited by Koh, C.H., Ministry of Environment, Seoul      145-171 p   Year.1997
Distribution of organochlorin pesticides in sediments and benthic organisms from Kyeonggi Bay and nearby areas in the west coast of Korea
  - Lee K. T., S. Tanabe, C. H. Koh
  - Methodologies for the Quality Assessment of Benthic Environment of Korean Coastal Waters. 2nd Year Report, edited by Koh, C.H., Ministry of Environment, Seoul      138-173 p   Year.1997
Application of equilibrium partitioning approach for the assessment of PCB contamination in sediments from the west coast of Korea
  - Lee K. T., S. Tanabe, C. H. Koh
  - Methodologies for the Quality Assessment of Benthic Environment of Korean Coastal Waters. 1st Year Report, edited by Koh, C.H., Ministry of Environment, Seoul      173-187 p   Year.1997
An improved speciation method for mercury by GC/CVFS after aqueous phases ethylation and room temperature precollection
  - Liang L., M. Horvat, N. S. Bloom
  - Talanta    41   371-379 p   Year.1994
Mercury bioacumulation by shrimp (Penaeus aztecus) transplanted to Lavaca Bay, Texas
  - Palmer S. J., B. J. Presley
  - Mar. Pollut. Bull.    26   564-566 p   Year.1993