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

Kim Yeongkyoo (Department of Geology, Kyungpook National University)
Kim Kyung-Mi (Department of Geology, Kyungpook National University)
Jung Hee-Jin (Department of Geology, Kyungpook National University)
Kang Hee-Dong (Department of Physics, Kyungpook National University)
Kim Wan (Department of Physics, Kyungpook National University)
Doh Si-Hong (Department of Physics, Pukoung National University)
Kim Do-Sung (Division of Science Education, Daegu University)
Publication Information
Economic and Environmental Geology / v.38, no.6, 2005 , pp. 689-697 More about this Journal
Abstract
Mineralogical composition, $^{137}Cs$ 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 $-0.48\~3.6\;Md\phi$. TOC contents and $^{137}Cs$ activities were in the range of $0.06\~1.75\%$ and minimum detectable activity (MDA) $\~4.0Bq/kg-dry$ with the average value of $1.15{\pm}0.62$ Bq/kg-dry, respectively. The sediments in study area were characterized by large particle size and small TOC contents, and $^{137}Cs$ 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 $10{\AA}$ XRD peak (mainly biotite) and chlorite were also identified. Among those minerals, biotite shows the linear relationship with $^{137}Cs$ 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 $^{137}Cs$ 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 $^{137}Cs$ in this study area was more significantly affected by the TOC content than mineral composition.
Keywords
marine sediment; mineral composition; TOC; particle size;
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