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NTIS 바로가기Journal of Korea Water Resources Association = 한국수자원학회논문집, v.52 no.11, 2019년, pp.917 - 929
고종민 (연세대학교 건설환경공학과) , 김영선 (한국건설기술연구원 국토보전연구본부) , 지운 (한국건설기술연구원 국토보전연구본부) , 강호정 (연세대학교 건설환경공학과)
Denitrification in streams is of great importance because it is essential for amelioration of water quality and accurate estimation of
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핵심어 | 질문 | 논문에서 추출한 답변 |
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아산화질소(N2O)의 특징은 무엇인가? | 아산화질소(N2O)는 강력한 온난화 기체로서 50~100년 시간규모에서 이산화탄소에 비해 온난화능이 대략 300배가 높은 영향력을 가지고 있어(Forster et al., 2007) 기후변화에 주요한 역할을 하지만, 발생원으로부터 발생하는 기체의 양을 정량화 하거나 발생 요인과 조건을 특정하는데 불확실성이 존재한다(Groffman et al., 2000; Sutton et al. | |
하천의 탈질의 역할은 무엇인가? | 하천의 탈질은 수질 개선과 정확한 아산화질소($N_2O$) 발생량 추정에 관련해서 매우 중요한 역할을 한다. 탈질과정은 질소 산화물($NO_3{^-}$)을 다수의 단계를 걸쳐 기체 질소($N_2$ 또는 $N_2O$)로 변화시키는 호흡과정으로, 강력한 온난화기체인 $N_2O$의 주요한 생물학적 배출 또는 흡수 과정이다. | |
N2O를 생산하는 주요한 과정은 크게 3가지로 분류되는데 무엇이 있는가? | N2O를 생산하는 주요한 과정은 크게 3가지로 분류된다. 첫 번째는 질산염(NO3-)이나 아질산염(NO2-)의 이원자 질소기체(N2)로의 환원 과정, 두번째는 암모니아(NH3)의 NO3-이나NO2-로의 산화 과정, 세번째로 NO3-의 NH3로의 이화적 환원과정이다. 강과 하천의 하상 내부나 혼합대(hyporheic zone)와 같은 혐기적 조건 하에서는 첫번째 과정인 혐기적 탈질과정이 N2O 발생의 대부분을 차지하며 낮은 산소 농도 하에서는 두번째 과정인 질산화의 부가 산물로서 N2O가 배출되거나 질산균 탈질화(nitrifier denitrification) 과정에서 N2O가 발생한다(Wrage et al. |
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