Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Distribution Characteristics of Polychlorinated Biphenyls in Sediments inside Jeju Harbor

제주항내 퇴적물의 PCBs 분포특성

  • Heo, Ryun-Yong (Graduate School of Jeju National University) ;
  • Kam, Sang-Kyu (Department of Environmental Engineering, Jeju National University) ;
  • Cho, Eun-Il (Department of Environmental Engineering, Jeju National University)
  • Received : 2016.03.15
  • Accepted : 2016.04.27
  • Published : 2016.04.30
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Abstract

In this paper, polychlorinated biphenyls (PCBs) were measured in surface sediments collected three times (June, October, December, 2013), inside Jeju Harbor as major harbors of Jeju Island. The concentration of PCBs inside Jeju Harbor was in the range of 1.62~4.45 (mean) ng/g on a dry weight basis and the levels were very low. In the analysis of PCBS homologue patterns, high-chlorinated PCB congeners were dominant in surface sediments inside Jeju Harbor, indicating that their sources were originated from shipping activity. In the relationships between PCBs concentrations and particle size (mud, sand and gravel) in surface sediments, PCBs concentrations were higher in the sediments with higher mud content, indicating that higher PCBs were distributed with increasing sediments of fine gradules. The PCBs concentrations in surface sediments in this study were very low, compared with ER-L (effect range-low) and TEL (threshold effects level) among sediment quality guideleines (SQGs) applied in foreign countries, such as USA, Canada, and Australia, etc), indicating that their biological effects on the bottom organisms in marine environment were expected to be very low.

본 연구에서는 제주도에서 규모가 가장 큰 항구인 제주항내 퇴적물을 대상으로 PCBs의 분포특성을 연구하였다. 연구 결과, 제주항 내 표층퇴적물에서 PCBs 화합물의 농도범위는 1.62~4.45 ng/g dw로 낮은 농도로 분포하고 있었고, PCBs의 동족체 패턴 분석을 보면 제주항은 선박 활동으로 유래되는 고염소화된 CBs(Hexa-CBs 이상)이 주로 분포하였다. 퇴적물에서 PCBs 화합물의 분포에 미치는 유기물의 영향을 평가하기 위하여 퇴적물 내 유기탄소 함량과 PCBs 화합물의 농도와의 상관관계를 검토한 결과, $R^2$이 0.8387로 높게 나타나 유기탄소 함량과 PCBs 농도는 매우 유의한 상관성을 보이는 것을 알 수 있었다. PCBs 화합물의 농도분포와 입자크기와의 관계에서 역질, 사질, 니질로 나누어 조사하였는데 니질의 함량이 증가할수록 PCBs의 농도도 높게 분포하였다. 그리고 연구지역의 표층퇴적물에서 분포하고 있는 PCBs의 농도를 국외에서 적용하고 있는 퇴적물오염기준(sediment quality guidenes, SQGs)의 ERL(effect range-low)과 TEL(Threshold Effects Level) 값과 비교한 결과, 훨씬 낮은 값을 보여 생태독성학적 관점에서 저서생물에 미치는 영향은 미미한 것으로 사료된다.

Keywords

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