Characteristics of Spatial Distribution of Geochemical Components in the Surface Sediments of the Deukryang Bay

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Research article

Journal of the Korean Society for Environmental Analysis 2012;15(3):203-214.

득량만 표층퇴적물의 지화학적 성분의 분포특성

전상백, 김평중, 김상수, 주재식, 이용화, 장대수, 이정의, 박승윤

국립수산과학원

Abstract

We measured various geochemical parameters including texture, chemical oxygen demand (COD), ignition loss (IL), acid volatile sulfide (AVS), nonmetallics, alkali metals, alkaline earth metals, transition elements and heavy metals in order to determine the characteristics of spatial distribution in the surface sediments collected from 19 stations in the Deukryang Bay. It was observed that chemical oxygen demand (COD) and acid volatile sulfide in most stations were below the criteria proposed by Japan Fisheries Resource Conservation Association (JFRCA) to evaluate the pollution status of marine sediment. The pollution level was estimated by Enrichment factor (Ef) and Index of geoaccumulation (Igeo). For elements, the Enrichment factors (Ef) were smaller than 1 except for arsenic (As) which had highest Ef value of 1.72 and the Index of geoaccumulation (Igeo) for nonmetallic and metallic elements ranged between 1 and 2, indicating that the pollution levels by these elements were not serious. However, for the sustainability of the Deukryang Bay, continous monitoring should be necessary for with these harmful elements.

Key Words: Deukryang Bay, Surface sediment, COD, IL, AVS, Nonmetallics, Alkali and alkaline earth elements,Transition and Heavy metals