사천만의 해수 및 표층 퇴적물의 세균학적 및 이화학적 특성
Bacteriological and Physiochemical Quality of Seawater and Surface Sediments in Sacheon Bay
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초록
이 연구는 2009년 1월부터 9월까지 총 4회(1월, 4월, 7월 9월) 사천만에서 해수와 표층퇴적물의 세균학적․이화학적 특성을 조사한 것이다. 조사기간 중에 수온은 5.3∼24.9℃(평균 17.7±0.4℃), 투명도는 1.4∼2.5m(평균 1.8±0.5m), 부유물질 농도는 16.2∼35.8㎎/L(평균 24.2±2.2㎎/L), 화학적산소요구량(COD)는 1.42~3.29 ㎎O2/L(평균 2.06±0.55 ㎎O2/L), 용존산소(DO)는 6.7∼9.5㎎/L(평균 7.9±0.6 ㎎/L)로 각각 조사되었다. 대장균군과 분변계대장균의 검출 범위는 <1.8∼7,900 MPN/100mL (GM 214.7 MPN/100mL)과 <1.8∼330 MPN/ 100mL (GM 9.7 MPN/100mL)로 각각 나타났다. 대장균군은 시료의 75.0%, 분변계대장균은 57.1%가 각각 양성을 나타내었다. 대장균군에 대한 분변계대장균의 양성율은 76.2%로 나타났다. 조사기간 중에 사천만에서의 표층퇴적물의 수분함량, 강열감량, COD 및 AVS의 평균값은 53.28±2.58%, 9.38±0.42%, 14.23±3.36㎎O2/g, 0.09±0.07㎎S/g로 각각 조사되었다.
Abstract
This study was conducted to investigate the bacteriological and physiological quality of seawater and surface sediments in Sacheon Bay of Korea from January to September in 2009. During the study period, the means of temperature was range from 5.3 to 24.9℃ (mean 17.7±0.4℃), transparency range from 1.4 to 2.5 m (mean 1.8±0.5 m), suspended solid ranged from 16.2 to 35.8 ㎎/L (mean 24.2±2.2 ㎎/L), chemical oxygen demand ranged from 1.42 to 3.29 ㎎O2/L (mean 2.06±0.55 ㎎O2/L), dissolved oxygen ranged from 6.7 to 9.5㎎/L (mean 7.9±0.6 ㎎/L), respectively. Seafood, if eaten raw, carries the risk of food poisoning. Seafood poisoning is often cause by pathogenic microorganism originating from fecal contamination, such as Salmonella sp., Shigella sp. and norovirus. Fecal coliforms are an important indicator of fecal contamination. Therefor, data on fecal coliform are very important for evaluating the safety of fisheries in coastal areas. So, we investigated the sanitary indicate bacteria. In this study, 56 sea water samples were collected from the Sacheon Bay, and total and fecal coliforms were compared and analyzed. The coliform group and fecal coliform MPN's of sea water in Sacehon Bay were ranged from <1.8∼7,900 MPN/100mL (GM 214.7 MPN/100mL) and <1.8∼330 MPN/100mL (GM 9.7 MPN/ 100mL), respectively. Total coliforms were detected in 75.0% of the samples and 76.2% of the total coliforms were fecal coliforms. During the study period, the means of water content, ignition loss, COD, and acid volatile sulfates in sediments in Sacheon Bay were 53.28±2.58%, 9.38±0.42%, 14.23±3.36 ㎎O2/g, 0.09±0.07 ㎎S/g, respectively.
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