Econ. Environ. Geol. 2005; 38(6): 689-697

Published online December 31, 2005

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Chracteristics of Sediment Compositions and Cs Adsorption on Marine Sediment near Wuljin Nuclear Powerplant

Yeongkyoo Kim1*, Kyung-Mi Kim1, Hee-Jin Jung1, Hee-Dong Kang2, Wan Kim2, Si-Hong Doh3, and Do-Sung Kim4

1Department of Geology, Kyungpook National University, Daegu 702-701, Korea
2Department of Physics, Kyungpook National University, Daegu 702-701, Korea
3Department of Physics, Pukoung National University, Busan 608-737, Korea
4Division of Science Education, Daegu University, Daegu 712-714, Korea

Correspondence to :

Yeongkyoo Kim

ygkim@knu.ac.kr

Received: September 20, 2005; Accepted: December 14, 2005

Abstract

Mineralogical composition, 137Cs activity, total organic carbon (TOC), and particle size of marine sediments near Wuljin Nuclear Powerplant were analyzed and the relationships among those components were investigated. The particle sizes of sediments were equivalent to sand size and in the range of -0.48~3.6 Mdφ. TOC contents and 137Cs activities were in the range of 0.06~1.75% and minimum detectable activity (MDA) ~4.0 Bq/kg-dry with the average value of 1.15±0.62 Bq/kg-dry, respectively. The sediments in study area were characterized by large particle size and small TOC contents, and 137Cs activity compared with other marine sediments. The main mineral components were quartz and feldspar (albite, microcline, and small amount of orthoclase) with small amount of pyroxene,
calcite, hornblende. Minerals with 10 ? XRD peak (mainly biotite) and chlorite were also identified. Among those minerals, biotite shows the linear relationship with 137Cs content probably due to the frayed edge site (FES) on biotite or small amount of mixed illite. However, TOC content shows most linear relationship with 137Cs content because no significant amount of clay minerals, which can adsorb significant amount of Cs, were observed in the study area, indicating that the distribution of 137Cs in this study area was more significantly affected by the TOC content than mineral composition.

Keywords marine sediment, mineral composition, 137Cs, TOC, particle size

Article

Econ. Environ. Geol. 2005; 38(6): 689-697

Published online December 31, 2005

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Chracteristics of Sediment Compositions and Cs Adsorption on Marine Sediment near Wuljin Nuclear Powerplant

Yeongkyoo Kim1*, Kyung-Mi Kim1, Hee-Jin Jung1, Hee-Dong Kang2, Wan Kim2, Si-Hong Doh3, and Do-Sung Kim4

1Department of Geology, Kyungpook National University, Daegu 702-701, Korea
2Department of Physics, Kyungpook National University, Daegu 702-701, Korea
3Department of Physics, Pukoung National University, Busan 608-737, Korea
4Division of Science Education, Daegu University, Daegu 712-714, Korea

Correspondence to:

Yeongkyoo Kim

ygkim@knu.ac.kr

Received: September 20, 2005; Accepted: December 14, 2005

Abstract

Mineralogical composition, 137Cs activity, total organic carbon (TOC), and particle size of marine sediments near Wuljin Nuclear Powerplant were analyzed and the relationships among those components were investigated. The particle sizes of sediments were equivalent to sand size and in the range of -0.48~3.6 Mdφ. TOC contents and 137Cs activities were in the range of 0.06~1.75% and minimum detectable activity (MDA) ~4.0 Bq/kg-dry with the average value of 1.15±0.62 Bq/kg-dry, respectively. The sediments in study area were characterized by large particle size and small TOC contents, and 137Cs activity compared with other marine sediments. The main mineral components were quartz and feldspar (albite, microcline, and small amount of orthoclase) with small amount of pyroxene,
calcite, hornblende. Minerals with 10 ? XRD peak (mainly biotite) and chlorite were also identified. Among those minerals, biotite shows the linear relationship with 137Cs content probably due to the frayed edge site (FES) on biotite or small amount of mixed illite. However, TOC content shows most linear relationship with 137Cs content because no significant amount of clay minerals, which can adsorb significant amount of Cs, were observed in the study area, indicating that the distribution of 137Cs in this study area was more significantly affected by the TOC content than mineral composition.

Keywords marine sediment, mineral composition, 137Cs, TOC, particle size

    KSEEG
    Apr 30, 2024 Vol.57 No.2, pp. 107~280

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