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Journal of the Korean Society for Environmental Analysis 2014;17(3):146-160.
Distribution and Pollution Assessment of Organic Matter and Trace Metals in Surface Sediment around Ulsan Harbor
울산항 주변 표층 퇴적물내 유기물과 미량금속 분포 특성 및 오염 평가
황동운1, 이인석1, 최민규2, 최희구1
1국립수산과학원
2국립수산과학원 어장환경과
Abstract
We measured the concentrations of various geochemical parameters (grain size, ignition loss [IL], chemicaloxygen demand [COD], acid volatile sulfide [AVS], total organic carbon [TOC], total nitrogen [TN] and tracemetals [Fe, Cu, Cd, Pb, Cr, Mn, As, Zn, and Hg]) in surface sediments in order to evaluate the pollution levelof organic matter and trace metals in sediment around Ulsan Harbor. Although the mean grain sizes (Mz) werein the wide range of 1.9 to 8.7Ø, the surface sediments consist of mainly finer sediments such as sandy mudand mud. The high concentrations of IL, COD, Fe, Mn, and Cr were observed in the Ulsan outer port, whilethe high concentration of AVS, TOC, TN, and most of trace metals (Cu, Cd, Pb, Zn, Hg) were observed nearthe Jangsaengpo port. Based on the TOC/TN ratios, the organic matter in the sediments of the study regionis likely to originate from oceanic source such as body or fragments of dead plankton. The organic matterssuch as IL and COD showed a good positive correlation with Mz, while the correlation between trace metals(except Fe, Cr, and Zn) and Mz no displays, indicating that trace metal concentrations in sediment are notsolely dependent on the grain size of sediment. The overall evaluation results for organic matter and metalpollution using the sediment quality guidelines and geochemical assessment techniques (enrichment factor andgeoaccumulation index) suggest that the surface sediments in the study regions are not polluted by organic matterand trace metals (except As).
Key Words: Sediment, Organic matter, Trace metal, Pollution, Ulsan Harbor


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