Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Characteristics of Total Carbon and Total Organic Carbon Using Elemental Analyzer in Hyung-Do Intertidal Zone Sediments

원소분석기를 이용한 형도 퇴적물의 총탄소 및 총유기탄소 특성

  • Lee, Jun-Ho (Department of Environmental Science and Engineering, Hankuk University of Foreign Studies) ;
  • Park, Kap-Song (Department of Environmental Science and Engineering, Hankuk University of Foreign Studies) ;
  • Woo, Han-Jun (Maritime Security Research Center, Korea Institute of Ocean Science & Technology)
  • 이준호 (한국외국어대학교 환경학과) ;
  • 박갑성 (한국외국어대학교 환경학과) ;
  • 우한준 (한국해양과학기술원 해양방위센터)
  • Received : 2012.02.24
  • Accepted : 2012.11.24
  • Published : 2012.12.28
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Abstract

Quantitative understanding of total carbon, total inorganic carbon and total organic carbon contained in ocean sediments is a basic data for interpretation of oceanic sediment environments. Elemental analyzer(EA) is frequently used for the analysis of carbon contents in inland soils and ocean sediments. Carbon and nitrogen contents of the soil reference material analyzed by an EA were 2.30% and 0.21% with standard deviations of 0.02 and 0.01, respectively. Relative standard deviations were 0.01 and 0.06, respectively, representing a high precision. Regression analysis of TOC and TC analysis results for the samples with TOC of less than 2.0% for the site in Hyung-Do showed a linear relationship with a slope of 0.9743($R^2$=0.9989, n=38), and the results of a relationship regression analysis between total organic carbon contents less than 0.5% and average grain size except for two samples showed a linear relationship with a slope of 0.0444($R^2$=0.6937 n=36). TOC contents of surface sediments were in the ranges of 0.10~1.67%(Average $0.26{\pm}0.37%$) with TOC values of 1.67% at S02 sampling site, 1.13% at S07 sampling site, and less than 1.00% at remaining sites. In the case of PC 01 core sediments, TOC showed the highest value of 0.20% near 70 cm. In the case of PC 02 core sediments, the highest value of 0.24% was indicated near 60 cm. The analysis method of organic carbon obtained from Hyung-Do Intertidal zone sediment sample results may be considered applicable to an organic carbon analysis for ocean sediments and useful for organic carbon analysis experiments of ocean sediments with a reduction in time required for the analysis and a high precision coupled with a high accuracy.

해양 퇴적물내 함유된 총탄소(total carbon; TC), 총무기탄소(total inorganic carbon; TIC)와 총유기탄소(total organic carbon; TOC)의 정량적 이해는 해양 저서 퇴적 환경 해석을 위한 기본 자료이다. 원소분석기(elemental analyzer; EA)는 내륙 토양 및 해양 퇴적물의 탄소성분 분석에 많이 이용되고 있다. 원소분석기로 분석한 표준시료샘플(soil reference material; SRM)의 탄소 및 질소함량은 평균 2.30%와 0.21%이었으며, 표준편차(standard deviation)는 각각 0.02, 0.01이었다, 상대표준편차(relative standard deviation; RSD)는 각각 0.01, 0.06으로 높은 정밀도를 나타내었다. 형도 부지의 총유기탄소(TOC) 2.0% 이하 샘플에 대해 총유기탄소(TOC)와 총탄소(TC) 분석치의 회귀분석은 기울기가 0.9743인 직선형 관계($R^2$=0.9989, n=38)를 보였으며, 2개 샘플을 제외한 총유기탄소 0.5% 이하의 총유기탄소량 및 평균입도의 관계 회귀분석 결과는 기울기가 0.0444인 직선형 관계($R^2$=0.6937 n=36)를 나타내었다. 형도 표층퇴적물의 총유기탄소(TOC) 함량은 0.10~1.67%(평균 $0.26{\pm}0.37%$) 범위로 S02 정점에서 1.67%, S07 정점에서 1.31%이고 나머지 점점은 1.00% 이하의 총유기탄소(TOC) 함량을 나타냈다. 주상퇴적물 PC 01 정점의 경우 70 cm 부근에서 총유기탄소(TOC)가 가장 높은 0.20%을 보였고, 주상퇴적물 PC 02 정점의 경우 60 cm 부근에서 가장 높은 0.24%를 나타내었다. 따라서 형도 샘플의 총유기탄소(TOC) 0.5% 이상 함유 샘플에 대해서는 탄산염 같은 무기탄소량이 높은 퇴적물 분석시 오차가 발생할수 있지만, 이와 같은 결과로부터 얻어진 유기탄소분석 방법은 해양 퇴적물의 유기탄소분석에 적용 될 수 있다. 그리고 원소분석기(EA) 정밀도 및 정확도로 해양 퇴적물 표층 및 주상 퇴적물 유기탄소분석 분석 실험에 유용 할 것으로 사료된다.

Keywords

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