Journal of the Korean Society for Marine Environment & Energy (한국해양환경ㆍ에너지학회지)

The Korean Society for Marine Environment and Energy (한국해양환경•에너지학회)
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Dissolved Copper and Nickel in the surface water of East Sea, Korea

동해 표층수중 용존 Cu, Ni의 분포 특성

  • 윤상철 (국립수산과학원 수산해양종합정보과) ;
  • 윤이용 (관동대학교 공과대학 보건환경학과) ;
  • 서영상 (국립수산과학원 수산해양종합정보과)
  • Received : 2013.10.10
  • Accepted : 2014.07.11
  • Published : 2014.11.25
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Abstract

The distributions of trace metals in the East Sea were investigated during the R/V Lavrentyev cruise (July 2009) in which four transects from Russia shore to South were conducted to collect 25 surface water samples. The total dissolved concentrations of Cu and Ni were measured using ICP-MS, DRC-e. In the coastal area, their concentrations of Russia shore (Cu, 1.51; Ni, 1.82 nM) were 1.9 times for Cu and 2.0 times for Ni lower than Korea shore (Cu, 2.87; Ni, 3.71 nM). In the subregion, their concentrations of Warm region (Cu, 3.03; Ni, 2.28 nM) were higher for Cu than Cold region (Cu, 2.04; Ni, 2.28 nM). The distributions of Cu and Ni concentrations were divided by lowest level at $10^{\circ}C$ of water temperature. In this study period, the surface water temperatures of Russia shore and Japan basin were lower than $10^{\circ}C$ and them of Ulleung basin and Sakhalin shore were higher. Below $10^{\circ}C$, Cu and Ni concentrations increased when surface water temperatures decreased. Above $10^{\circ}C$, their concentrations increased with temperature, which showed highest concentrations in the Ulleung basin, directly influenced by flux from East Korean Warm Current. By comparing with other sea areas (Western Mediterranean, Atlantic), Cu concentrations in the East Sea were a little higher and Ni concentrations were lower. Particularly as the level of Cu in the offshore in the Ulleung basin were higher than in the coastal area, We can suggest that the atmospheric flux of Cu is relatively important in this area.

2009년 7월 3일부터 7월 27일까지 러시아 조사선 R/V Lavrentyev를 이용하여 러시아 연안으로부터 4개의 Line(D, R, E, A)을 따라 표층 30 m 수심의 시료를 25개 정점에서 채수하여 Cu와 Ni 의 농도를 분석하였다. 해역별로 Cu와 Ni의 농도를 비교하면, 연안역에서는 러시아 연안(평균 Cu, 1.51; Ni, 1.82 nM)보다 우리나라 동해 연안의 농도(평균 Cu, 2.87; Ni, 3.71 nM)가 각각 1.9, 2.0배 높으며, 난수역(평균 Cu, 3.04; Ni, 2.31 nM)은 냉수역(평균 Cu, 2.09; Ni, 2.27nM)에 비해 Ni의 농도는 비슷하지만 Cu의 농도는 1.5배 높게 나타났다. Cu와 Ni의 농도분포는 표층 수온 $10^{\circ}C$를 기점으로 구분되는 특성을 보이고 있다. $10^{\circ}C$ 이하의 해역은 주로 러시아 연안과 일본분지내의 정점이고, $10^{\circ}C$ 이상의 해역은 울릉분지내 해역과 사할린 섬 부근의 연안 정점이다. Cu와 Ni은 $10^{\circ}C$ 이하에서(주로 일본분지) 수온이 감소함에 따라 농도가 증가하는 추세로 한류수계수의 농도가 주변 연안이나 외해보다 높게 나타났으며, $10^{\circ}C$ 이상에서는(주로 울릉분지) 수온이 증가함에 따라 농도가 증가하는 추세로서 대마 난류수의 영향을 받고 있는 울릉분지에서 높은 농도를 보이고 있다. 동해 표층수의 미량금속 농도 분포는 동해에 존재하는 다양한 수괴의 혼합과 육지로부터 강과 대기를 통한 전달, 그리고 유,무기성 입자물질과의 상호작용에 의해 결정되며, 다른 해역(서지중해, 베델해, 대서양)보다 Cu의 함량은 높고 Ni의 함량은 다소 낮게 나타나고 있다. 특히 동해 남부 울릉분지 해역의 Cu 농도는 우리나라 동해 연안보다 높으며, 전 조사수역에서 가장 높은 농도를 보임으로서 우리나라와 일본으로부터 대기를 통한 전달량의 영향이 상대적으로 클 것으로 추론할 수 있다.

Keywords

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