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

  • 제21권4호
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  • Pages.347-360
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  • 2015
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  • 1229-3431(pISSN)
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  • 2287-3341(eISSN)
해양환경안전학회 (The Korean Society of Marine Environment and safety)
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진해만 양식어장 주변 표층 퇴적물 중 미량금속의 분포 특성 및 오염 평가

Distribution and Pollution Assessment of Trace Metals in the Surface Sediments around Farming Area of Jinhae Bay

  • 최태준 (국립수산과학원 어장환경과) ;
  • 권정노 (국립수산과학원 어장환경과) ;
  • 이가람 (국립수산과학원 어장환경과) ;
  • 황현진 (국립수산과학원 어장환경과) ;
  • 김영숙 (국립수산과학원 어장환경과) ;
  • 임재현 (국립수산과학원 어장환경과)
  • Choi, Tae-Jun (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Kwon, Jung-No (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Lee, Garam (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Hwang, Hyunjin (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Kim, Youngsug (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Lim, Jae-Hyun (Marine Environment Research Division, National Fisheries Research & Development Institute)
  • 투고 : 2015.08.03
  • 심사 : 2015.08.27
  • 발행 : 2015.08.31
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초록

2013년 8월 진해만을 대상으로 표층 퇴적물을 채취하여 미량금속(As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Pb, Zn)의 분포를 살펴보고, 오염도를 분석하였다. 미량금속의 평균농도는 As 11.1 mg/kg, Cd 0.52 mg/kg, Co 14.1 mg/kg, Cr 69.8 mg/kg, Cu 57.2 mg/kg, Fe 3.7 %, Hg 0.064 mg/kg, Mn 600 mg/kg, Pb 40.1 mg/kg, Zn 167.2 mg/kg 의 범위로 조사되었다. 미량금속 중 As, Co, Cr, Fe의 농도는 만 전반적으로 균일한 분포를 보였다. 반면, Cd, Hg, Pb, Zn는 마산만을 포함한 진해만의 북쪽 해역, Cu는 진해만 남동쪽의 고현만, Mn은 거제도 북쪽과 마산만 남쪽을 잇는 만 동쪽방면의 외해로 열린 해역에서 국지적으로 높은 농도를 나타냈다. 각 미량금속의 공간적 분포, 퇴적물 입도 및 미량금속 간의 상관관계와 요인분석 결과 등을 종합적으로 검토해봤을 때, Co, Cr, Fe는 퇴적물의 입도, Mn은 퇴적물의 산화환원 상태, 그리고 As, Cd, Cu, Hg, Pb, Zn은 만 주변의 오염활동으로 인한 미량금속 공급에 따라 분포가 지배되는 것으로 파악되었다. 미량금속 중 As, Cd, Cr, Hg, Pb의 농도를 국내 해양 퇴적물 환경기준인 주의기준(TEL), 관리기준(PEL)과 비교 시, Cd, Hg, Pb의 농도가 만의 북쪽인 마산만 주변에서 주의기준을 초과하였다. 각 미량금속의 농축계수 및 농집지수를 계산한 결과, As, Cd, Cu, Hg, Mn, Pb, Zn가 일부 해역에서 인위적 오염을 보였다. 이 중 As, Mn, Zn은 우려할만한 수준의 오염을 보이진 않았으나, 마산만을 포함한 만 북쪽에서는 Cd, Hg, Pb, 만 남동쪽 가장 안쪽의 고현만에서는 Cu로 인한 오염 수준이 비교적 높게 나타나 해당 원소의 농축에 대해 주의가 필요할 것으로 판단된다.

Trace metals(As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Pb and Zn) concentrations in surface sediments of Jinhae bay in August of 2013 were measured to investigate the characteristics of trace metals distribution and to evaluate the metal pollution. Assessment for metal pollution was carried out using the sediment quality guidelines(SQGs) such as threshold effects level(TEL) and probable effects level(PEL) proposed by the ministry of onceans and fisheries(MOF) in Korea and geochemical assessment techniques(enrichment factor(EF) and geoaccumulation index ($I_{geo}$)). The mean concentration of trace metals in the sediments are as follows: 11.1 mg/kg for As, 0.52 mg/kg for Cd, 14.1 mg/kg for Co, 69.8 mg/kg for Cr, 57.2 mg/kg for Cu, 3.7 % for Fe, 0.064 mg/kg for Hg, 600 mg/kg for Mn, 40.1 mg/kg for Pb, 167.2 mg/kg for Zn. The spatial distributions of As, Co, Cr and Fe were not distinguished clearly in whole area. However, Cd, Hg, Pb and Zn were high in northern area of bay, and Cu and Mn were high in southeastern and eastern area of bay, respectively. The distribution pattern of trace metals, correlation matrix and R-mode factor analyses results revealed that the distribution of trace metals were mainly effected by the sediment grain size(Co, Cr and Fe), redox condition of sediments(Mn) and anthropogenic factors(As, Cd, Cu, Hg, Pb and Zn). Comparing the concentrations of several trace metals(As, Cd, Cr, Hg and Pb) with SQGs from Korea(TEL and PEL), the concentrations of Hg, Cd and Pb in sediment of northern area of bay were higher than TEL. EF and $I_{geo}$ values of As, Cd, Cu, Hg, Mn, Pb and Zn showed that these metals in sediments are enriched by anthropogenic activities in some areas, and pollution status for Cd, Hg and Pb in northern area and Cu in southeastern area of bay were concerned about current level, although those for As, Mn and Zn were not.

키워드

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