한국수자원학회논문집 (Journal of Korea Water Resources Association)

  • 제42권8호
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  • Pages.631-641
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  • 2009
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  • 2799-8746(pISSN)
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  • 2799-8754(eISSN)
한국수자원학회 (Korea Water Resources Association)
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하수처리수의 방류를 받는 하천감조부에서의 N2O생성

Production of Nitrous Oxide in Tatara Estuary Receiving Treated Wastewater

  • 이승윤 (한국수자원공사 K-water연구원 녹색기술연구소)
  • 발행 : 2009.08.31
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초록

본 연구는 부영양화되어 있는 하구감조역에서의 $N_2O$생성과 거동을 파악하는 것을 목적으로 도시역에서의 N2O발생에 착안하여 그 중에서도 인위적 임팩트가 크다고 판단되는 하수처리수 생활폐수 등이 유입되는 도시하천감조역을 대상으로 현지 정점조사를 실시하여 수역의 사계절에 걸친 각 질소성분의 농도변화와 flux를 상세히 파악하고 저질간극수 중의 연직분포를 측정하였다. 그 결과, 완혼합이고 염수쐐기설(楔)가 형성되는 Tatara천(川)에서 하수처리수는 해수의 혼합형태의 영향을 크게 받고 고농도수괴(水塊)로서 표층을 이동하고 있으며, 이 수역의 질소변환기구 및 $N_2O$생성과정에 큰 영향을 미치고 있는 것이 밝혀졌다. 이 수역에서 관측된 $N_2O$농도는 1.8-20.9 $\mu M$로서 대기중의 포화농도와 담수중의 포화농도를 고려하면 항상 포화농도상태이며, 주발생원은 수역저토였다. 저질간극수 중의 각 질소성분의 농도분포는 호소와 인근해역에서의 분포와는 달리 분자확산 이외의 수송경로가 있다는 것이 시사되었다.

Transport of nitrous oxide and treated waste water was investigated in an estuary receiving treated waste water. Seasonal change of water quality were also observed to assure origins of $N_2O$ and to estimate the influence of treated waste water on $N_2O$ production in the survey area. Based on nitrous oxide concentration profiles in the survey area, discharged treated waste water were traced, which flowed upstream at the flood tide and downstream at the ebb tide with concentration maxima. It is assumed that nitrous oxide discharged from treated waste water is transported to the survey area with partial and vertical mixture. To determine the production of $N_2O$ in survey area, flux at each sampling sites were calculated and 25% of the produced $N_2O$ was originated from treated waste water in result. The remaining percentage of the production was also assumed to be the discharge from the sediment layers.

키워드

참고문헌

  1. 寺井久滋, 楊宗典(1995). 水圏からの窒素の放出((松本聡編微生物の生態20，微生物ガス代謝と地球環境), 学会会出版センタ, pp. 123-143
  2. 陽捷行(1994). 土壌圏と大気圏, 朝倉書店, pp. 140-145
  3. 李昇潤, 楠田 哲也, 大石京子, 今村 正浩 (1997). '下水処理水の放流を受ける河川感潮部におけるN2Oの擧動' 第５回地球環境シンポジウム講演集 第5巻, pp. 147-154
  4. 李昇潤(2006). 都市河川感潮域干潟部における窒素マ換機構と$N_2O$の生成 擧動に関する研究. 博士学位論文, 九州大学, pp. 40-66
  5. Goreau, T. J., Kaplan, W. A., Wosfy, S. C., McElroy, M. B., Valois, F. W. and Watson, S. W. (1980). 'Production of $NO_2^-$and $N_2O$ by nitrifying bacteria at reduced concentrations of oxygen.' Applied and Environmental Microbiology, Vol. 40, pp. 526-532
  6. Hemond, H.F., Duran, A.P. (1989). 'Fluxes of $N_2O$ at the sediment-water and water-atmosphere boundaries of a nitrogen-rich river.' Water Resources Research, Vol. 25, No. 5, pp. 839-846 https://doi.org/10.1029/WR025i005p00839
  7. Hynes, R.K., Knowles, R. (1984). 'Production of nitrous oxide by nitrosomonas europaea : effects of acetylene, pH and oxygen.' Canadian Jour. Microbiology, Vol. 30, pp. 1397-1404 https://doi.org/10.1139/m84-222
  8. IPCC(Intergovernmental Panel on Climate Change) (1996). Climate Change 1995. The Science of Climate Change, Cambridge U. P., Cambridge, pp. 572-573
  9. Kaplan, W.A., Elkins, J.W., Kolb, C.E., McElroy, M.B., Wofsy, S.C., and Duran, A.P. (1978). 'Nitrous oxide in freshwater systems : An estimate for the yield of atmospheric $N_2O$ associated with disposal of human waste.' Pure Applied Geophysics, Vol.116, pp. 423-438 https://doi.org/10.1007/BF01636897
  10. Khalil, M. A. K et al. (1992). 'The global sources of nitrous oxide.' Jour. Geophys. Research, Vol. 97, pp. 14652-14660
  11. Knowles, R. (1982). 'Denitrification' Microbiological Review, Vol. 46, pp. 43-70
  12. Kusuda, T., Lee, S.Y., Imamura, M., and Oishi, K. (1996). 'Production of nitrous oxide in an estuary receiving effluent of treated wastewater.' The 3rd Symposium on Environmental Quality Management and Control, Daegu, Korea. pp. 59-73
  13. Law, C.S., Rees, A.P., and Owens, N.J.P. (1991). 'Temporal variability of denitrification in estuarine sediments.' Estuarine and Coastal Shelf Science, Vol. 33, pp. 37-56 https://doi.org/10.1016/0272-7714(91)90069-N
  14. Oudot, C., Andrie, C. and Montel. Y. (1990). 'Nitrous oxide production in the atlantic ocean.' Deep sea Research, Vol. 37, pp. 183-202 https://doi.org/10.1016/0198-0149(90)90123-D
  15. Payne, W. J. (1981). 'The status of nitric oxide and nitrous oxide as intermediates in denitrification, In denitrification, nitrification and atmospheric nitrous oxides.' C. Delwiche, Wiley, New York, USA
  16. Smith, M. S., Zimmerman, K. (1981). 'Nitrous oxide production by nondenitrifying soil nitrate reducers.' Soil Sci. Soc. Am. Journal, Vol. 45, pp. 139-143 https://doi.org/10.2136/sssaj1981.03615995004500010030x
  17. Ueda, S., Ogura, N. (1999). 'Mass Balance and Nitrogen isotopic determination of sources for N2O in a eutrophic river.' Japan Journal of Limnology, Vol. 60, pp. 51-65
  18. Weiss, R.F., Price, B.A. (1980). 'Nitrous oxide solubility in water and seawater' Marine Chemistry Vol. 8, No. 4, pp. 347-359 https://doi.org/10.1016/0304-4203(80)90024-9