영산강 퇴적물에서 용출되는 용존 유기물의 형광특성 분석 = Fluorescence Analysis of Dissolved Organic Matter Released from Sediment of Yeongsan River

국문 초록 (Abstract)

본 연구에서는 영산강 죽산보 상류의 퇴적물에서 수층으로 용출되는 용존 유기물을 대상으로 형광분석을 실시하였다. 시료 채취는 2015년 7월 6일 죽산보 상류 0.5 km (YS1)와 1.5 km (YS2)에서 이루어 졌으며, 채취한 퇴적물을 깊이별(T,M, B)로 나누어 20℃에서 7일 동안 배양하였다. 배양한 시료를 대상으로 용존 유기탄소를 측정하고 형광분석을 실시하였다. 용존 유기탄소는 보와 인접하고 입자 크기가 작은 YS1 지점에서 배양에 따라 증가하는 경향을 보였다. 형광분석을 통해 유기물 특성의 지표인 SUVA, HIX, BIX, FI를 계산한 결과 용존 유기물 중 소수성 유기물과 고분자 유기물은 YS1 지점에서 YS2 지점보다 많이 포함되어 있었다. 배양에 따라 퇴적물에서 수층으로 용출되는 용존 유기물은 육상기원 유기물과 미생물기원 유기물이 혼합된 복합기원 휴믹물질이었다. PARAFAC 분석 결과 제시된 두 가지 성분은 Humic-like와 Tryptophan-like 물질로, 배양에 따라 Humic-like 물질은 두 지점 모두에서 용출되었으며, Tryptophan-like 물질은 YS2 지점에서만 용출되었다. 본 연구의 결과로부터 정체성 수역 내 퇴적물의 유기물 용출 특성이 시간적, 공간적으로 변화함을 알 수 있었고, 이는 향후 정체수역 수질관리를 위한 기초자료로 활용될 수 있다고 판단된다.

다국어 초록 (Multilingual Abstract)

This study conducted fluorescence analysis of the dissolved organic matter released from the sediments in the upper stream of Juksanbo, Yeongsan River. Sediment samples were obtained at 0.5 km (YS1) and 1.5 km (YS2) upstream of Juksanbo on July 6. 2015. The sediments were divided by depth (T, M and B) and incubated at 20℃ for 7 days. The supernatant of incubated samples was used for the measurement of dissolved organic carbon and fluorescence analysis. The concentration of dissolved organic carbon was higher at YS1 with smaller particle size. As a result of SUVA, HIX, BIX and FI analysis, hydrophobic organic matter and polymeric humic organic matter were contained more in YS1 than YS2. Dissolved organic matter released from the sediment to the water layer with incubation was the terrestrial origin organic matter or the autochthonous organic matter. The parallel factor analysis (PARAFAC) results showed that two fluorescence components: terrestrial Humic-like (C1) and Tryptophan-like (C2) constituted the fluorescence matrices of sediment samples. From the results of this research, there is spatial and temporal variation of the organic matter released from the sediment of the river with weir, which is useful information for the water quality management in the future.

목차 (Table of Contents)

• Abstract
• 요약
• 1. 서론
• 2. 연구방법
• 3. 결과 및 고찰
• 4. 결론
• References

참고문헌 (Reference)

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