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http://dx.doi.org/10.5762/KAIS.2016.17.12.333

The geochemical characteristic and quality assessment of surface sediments in Sihwa Lake  

Ju, Jae Sik (South Sea Fisheries Research Institute, National Institute of Fisheries Science)
Son, Moonho (South Sea Fisheries Research Institute, National Institute of Fisheries Science)
Cho, Hyeon-Seo (Environmental Oceanography, Chonnam National University)
Kim, Pyoung-Joong (South Sea Fisheries Research Institute, National Institute of Fisheries Science)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.17, no.12, 2016 , pp. 333-338 More about this Journal
Abstract
The purpose of this study was to understand the pollution level of the surface sediment of Sihwa Lake by assessing its geochemical characteristics and investigating the spatial distribution of trace metals and organic matter. In the surface sediment of Sihwa lake, the mean grain size was between 2.94 and 6.35 Ø and the main type of sediment was sandy silt. The concentrations of As, Co, Cr, Ni, V and Li among the metal elements in the surface sediment were correlated with the mean crust concentration (p<0.05). Based on the strong correlation between the metals (Cd, Cu, Pb and Zn) and organic matter (Ignition Loss), the concentrations of these metal elements seem to be controlled by the organic matter dilution effect. The trace metal pollution level, determined by applying the Republic of Korea Marine environmental standard and the US National Oceanic and Atmospheric Administration's sediment quality guidelines, showed the pollution level of As to be either close to or in excess of the above-mentioned standards at almost all levels. The enrichment factor and geoaccumulation index of As showed that there was an incremental increase of pollution by elements other than V, Cr, Co, Fe, Al and Mn. Moreover, the nearby industrial area and dike were more polluted than the other areas, so the surface sediments in Sihwa lake should be monitored by taking into consideration the geological variations.
Keywords
enrichment factors; geoaccumulation Index; geochemical characteristics; Shiwha Lake; trace metal;
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