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NTIS 바로가기Journal of nuclear fuel cycle and waste technology = 방사성폐기물학회지, v.15 no.2, 2017년, pp.101 - 116
정의창 (한국원자력연구원) , 백민훈 (한국원자력연구원) , 조혜륜 (한국원자력연구원) , 김희경 (한국원자력연구원) , 차완식 (한국원자력연구원)
The interaction of U(VI) (hexavalent uranium) species with natural organic matter (NOM) in KURT (KAERI Underground Research Tunnel) groundwater is investigated using a laser spectroscopic technique. The luminescence spectra of the NOM are observed in the ultraviolet and blue wavelength regions by ir...
핵심어 | 질문 | 논문에서 추출한 답변 |
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형광(fluorescence) 분광학이 미량의 천연 유기물질을 고감도로 구분하는데 유리한 이유는 무엇인가? | 천연 유기물질의 종류를 구분하기 위해서는 수지 흡착, 크기 배제 크로마토그래피, 핵자기공명 분광학, 형광(fluorescence) 분광학 등의 기술이 이용되고 있다[12]. 특히 형광 분광학 기술은 화학종의 종류에 따라 차이가 나는 들뜸(excitation) 및 방출(emission) 파장, 형광 수명(lifetime)을 측정하기 때문에 미량의 천연 유기물질을 고감도로 구분하는데 유리하다[13-17]. 제논(Xe) 램프 등의 일반 광원을 사용하는 전통적인 형광분광계(spectrofluorometer)를 이용할 경우에는 일정한 파장 차이를 유지한 조건에서 들뜸 및 방출 파장을 동기 스캔(synchronous scan)하여 형광 스펙트럼의 분해능을 높임으로써 여러 종류의 천연 유기물질을 동시에 구분할 수도 있다[18-24]. | |
대표적인 천연 유기물질은 무엇이 있는가? | 악티나이드를 비롯한 방사성 원소는 지하수에 존재하는 천연 유기물질(natural organic matter, NOM)과 상호작용하여 착물을 형성할 수 있다[3,4]. 단백질, 지질(lipid), 탄수화물, 아미노산,지방산, 흄산(humic acid, HA) 등이 대표적인 천연 유기물질이다[3]. 중성 pH 조건의 지하수 환경에서는 미세입자 상태로 부유물을 이루는 흄산에 방사성 원소가 흡착될 수도 있다[5-11]. | |
천연 유기물질의 농도를 측정하기 위한 방법은 무엇인가? | 천연 유기물질은 지하수를 비롯한 거의 모든 자연수에서 관측된다. 천연 유기물질의 농도를 측정하기 위해서는 자외선-가시광선 파장 영역의 흡수 분광학 및 총 유기 탄소(total organic carbon) 분석법이 주로 이용되고 있다[12]. 천연 유기물질의 종류를 구분하기 위해서는 수지 흡착, 크기 배제 크로마토그래피, 핵자기공명 분광학, 형광(fluorescence) 분광학 등의 기술이 이용되고 있다[12]. |
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