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ISSN : 1225-3480

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30권 4호

안정만 패류양식해역의 표층퇴적물의 지화학적특성과 중금속 함량

Physiochemical Characteristics and Heavy Metal in the Surface Sediments of Marine Shellfish Farming Waters in Anjung Bay, Korea

정우건 (경상대학교 해양생명과학과)
조상만 (군산대학교 해양생명과학과)
이상준 (경상대학교 해양생명과학과)
한국패류학회지 / The Korean Journal of Malacology, (P)1225-3480;
2014, v.30 no.4, pp.421-428
https://doi.org/10.9710/kjm.2014.30.4.421
정우건, 조상만, & 이상준. (2014). 안정만 패류양식해역의 표층퇴적물의 지화학적특성과 중금속 함량. , 30(4), 421-428, https://doi.org/10.9710/kjm.2014.30.4.421

초록

굴양식이 성행하는 안정만 해역은 인근 연안에 LNG비축기지, 조선소 등의 공단이 가동되고 있어 일부 양식장은 품종을 전환하고 있다. 이 연구는 안정만 해역의 연안생태계에 영향을 미치는 저질환경 특성을 조사하기 위하여 2009년부터 2010년까지 2회에 걸쳐 20개 정점의 표층퇴적물을 채집, 분석하였다. 안정만 해역의 표층퇴적물의 IL은 6.41-11.68% (평균 $9.52{\pm}1.28%$)의 범위였고, COD는 17.99-43.84 mg/g (평균 $27.53{\pm}6.39mg/g$), 그리고 AVS는 0.05-0.61 mg/g (평균 $0.17{\pm}0.14mg/g$)의 범위였다. 유기물함량은 저질의 수분함량과 밀접한 상관관계가 있었고, 이는 양식품종의 분포 패턴과도 관계가 있어 흰멍게로 양식품종이 변화된 북부해역의 COD가 비교적 높게 나타났다. 일부 조사정점을 제외하고 대부분의 중금속함량은 NOAA의 ERL 기준치 이하였고, 중금속 부화지수는 0.96-1.12의 범위로 중금속 오염에서는 비교적 청정한 것으로 판단되지만, 증가하는 선박 통행량을 고려할 때, 지속적인 저질환경 모니터링이 요구된다.

keywords
Anjung Bay, COD, Sediment, Heavy metal, Enrichment factor

Abstract

Total 20 surface sediments were collected in Anjung bay to investigate the physicochemical environment and heavy metal contents. The physicochemical investigation ranged from 6.41% to 11.68% (average $9.52{\pm}1.28%$) for ignition loss (IL), from 17.99 mg/g to 43.84 mg/g (average $27.53{\pm}6.39mg/g$) for chemical oxygen demand (COD), and from 0.05 mg/g to 0.61 mg/g (average $0.17{\pm}0.14mg/g$) for acid volatile sulfide (AVS) with significant correlation between water content (W/C) and COD. A contour of spatial distribution indicated higher organic pollution at the bottom of ascidian, Stylea clava, cultural waters. Most of metals contents was not exceeded the NOAA's effect range-low (ERL). Estimated enrichment factor (EF) ranging 0.96-1.12 indicated that the sediment environment of the studied waters was relatively pristine from heavy metal pollution in spite of increased vessel traffics, so far.

keywords
Anjung Bay, COD, Sediment, Heavy metal, Enrichment factor

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