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http://dx.doi.org/10.7846/JKOSMEE.2013.16.2.71

Vertical Profiles and Assessment of Trace Metals in Sediment Cores From Outer Sea of Lake Shihwa, Korea  

Ra, Kongtae (Marine Environments & Conservation Research Division, Korea Institute of Ocean Science & Technology (KIOST))
Kim, Joung-Keun (Marine Environments & Conservation Research Division, Korea Institute of Ocean Science & Technology (KIOST))
Kim, Eun-Soo (Oceanographic Measurement and Instrument Calibration Service Center, Korea Institute of Ocean Science & Technology (KIOST))
Kim, Kyung-Tae (Marine Environments & Conservation Research Division, Korea Institute of Ocean Science & Technology (KIOST))
Lee, Jung-Moo (Oceanographic Measurement and Instrument Calibration Service Center, Korea Institute of Ocean Science & Technology (KIOST))
Kim, Eu-Yeol (Marine Environments & Conservation Research Division, Korea Institute of Ocean Science & Technology (KIOST))
Publication Information
Journal of the Korean Society for Marine Environment & Energy / v.16, no.2, 2013 , pp. 71-81 More about this Journal
Abstract
Trace metal concentration in sediment cores from the outer sea of Lake Shihwa were determined to study the vertical profiles of metal concentrations and to evaluate the levels of metal contamination. Sediment pollution assessment was carried out using enrichment factor (EF) and geo-accumulation index (Igeo). The mean concentration of metals were 58.8 mg/kg for Cr, 10.3 mg/kg for Co, 22.8 mg/kg for Ni, 18.1 mg/kg for Cu, 74.0 mg/kg for Zn, 6.75 mg/kg for As, 0.14 mg/kg for Cd, 27.4 mg/kg for Pb and 0.026 mg/kg for Hg, respectively. The mean EF values for Cu, Zn, As, Cd and Hg were greater than 1.5 in sediment cores, indicating that these metals in sediments are slightly enriched by anthropogenic activities. The geo-accumulation index (Igeo) suggested unpolluted status for metals of sediments collected from outer see of Lake Shihwa. Igeo values for Cu and Hg nearby LNG station (site C, D, E) ranged from 1 to 2, indicating moderately to unpolluted pollution status for those metals. Even if the higher concentrations of trace metals nearby LNG station were observed, there is significantly positive relationship between Al and trace metals. Thus, the sediment grain size plays an important roles in influencing the distribution of trace metals in sediment cores from the outer sea of Lake Shihwa. Based on the comparison with sediment quality guidelines such as threshold effect level and probable effect level in Korea, the concentration of metals in sediments from outer sea of Lake Shihwa are likely to result in no harmful effects on sediment-dwelling organisms.
Keywords
Trace metals; sediment core; Lake Shihwa; contamination; sediment quality guidelines;
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Times Cited By KSCI : 4  (Citation Analysis)
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