Study on the Characteristics of Dissolved Organic Matters from Diverse Sources by XAD Resin Fractiontion and Microbial Incubation Experiments

XAD 수지분획과 생분해 실험에 의한 기원별 용존유기물질 특성 연구

  • Oh, Seijin (Department of Environmental Engineering, Seoul National University of Science and Technology) ;
  • Choi, ChanKyu (Department of energy, The graduate school of Energy and Environment, Seoul National University of Science and Technology) ;
  • Hur, Jin (Department of Environment and Energy, Sejong University) ;
  • Jung, Myung-Sook (Han-river Environment Research Laboratory) ;
  • Shin, Hyun-Sang (Department of Environmental Engineering, Seoul National University of Science and Technology)
  • 오세진 (서울과학기술대학교 환경공학과) ;
  • 최찬규 (서울과학기술대학교 에너지환경대학원 에너지환경공학과) ;
  • 허진 (세종대학교 환경에너지융합과) ;
  • 정명숙 (국립환경과학원 한강물환경연구소) ;
  • 신현상 (서울과학기술대학교 환경공학과)
  • Received : 2010.07.29
  • Accepted : 2010.08.18
  • Published : 2010.11.30

Abstract

In this study, characteristics of dissolved organic matter (DOM) from Lake Paldang and seven other DOM sources (lake plankton, plants, soil, composite, treated sewage) were studied using XAD resin fractionation and 28-day microbial incubation experiment. Distribution patterns of DOM-fractions, which include hydrophilic acids (HiA), hydrophilic bases (HiB), hydrophilic neutrals (HiN), hydrophobic acids (HoA), hydrophobic neutrals (HoN) and the extent of DOM biodegradation (i.e., biodegradability) were different depending on the origins of the DOM samples. The DOM distribution pattern and the biodegradability were found to be effective for distinguishing the different DOM sources. The biodegradability (%) had negative correlations with the content (%) of hydrophobic fractions (Ho) and specific UV absorbance of DOM, which indicate that the Ho fractions contain more aromatic carbon structures and relatively stable during biodegradation, irrespective of the sources. To gain additional insight into the microbial transformation of the DOM, we also investigated the changes in the fraction's distribution for plankton, leaf litter and composite samples after the incubation. The results showed that biodegradation of hydrophilic fraction (Hi) causes an increase in the proportion of Ho (HoA, HoN), while biodegradation of HoA increases the HoN production.

Keywords

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