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해양퇴적층에서 적조생물(Cochlodinium polykrikoides)의 혐기성 분해과정 중 황토가 휘발성 지방산 생성에 미치는 영향

Effects of Yellow Clay on the Production of Volatile Fatty Acids during the Anaerobic Decomposition of the Red Tide Dinoflagellate Cochlodinium polykrikoides in Marine Sediments

  • 박영태 (국립수산과학원 남동해수산연구소) ;
  • 이창규 (국립수산과학원 남동해수산연구소) ;
  • 박태규 (국립수산과학원 남동해수산연구소) ;
  • 이윤 (국립수산과학원 서해수산연구소) ;
  • 배헌민 ((주) 해마)
  • Park, Young-Tae (Southeast Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Lee, Chang-Kyu (Southeast Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Park, Tae-Gyu (Southeast Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Lee, Yoon (West Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Bae, Heon-Meen (Haema Co. LTD.)
  • 투고 : 2012.06.14
  • 심사 : 2012.09.18
  • 발행 : 2012.10.31

초록

The formation of volatile fatty acids(VFAs) and changes in pH, oxidation and reduction potential(Eh) and acid volatile sulfide(AVS) with the addition of yellow clay were investigated using microcosm systems to examine the effects of yellow clay dispersion on the anaerobic decomposition of Cochlodinium polykrikoides in marine sediments. The acetate concentration reached a maximum by day 4 and was 1.2-1.8 fold less in the sample treated with yellow clay compared to the untreated sample (224-270 vs. 333 uM). The formate concentration reached a maximum by day 1 and was 1.3-2.8 fold less in the sample treated with yellow clay compared to the untreated sample (202-439 vs. 563 uM). The propionate concentration reached a maximum by day 2 and was 1.5-1.8 fold less in the sample treated with yellow clay compared to the untreated sample (32.6 vs. 57.2 uM). After the amounts of acetate, formate and propionate peaked the levels dropped dramatically due to the utilization by sulfate reducing bacteria. The Eh of the samples treated with yellow clay was similar to the untreated sample on day 0 but was higher in the sample treated with yellow clay(140-206 mV) from days 4 to 17. AVS started to form on day 3 and this was sustained until day 6, and 1.2-2.2 fold less was produced in the sample treated with yellow clay compared to the untreated sample (40.2-69.3 vs. 83.2-93.8 mg/L). Accordingly, during the anaerobic decomposition of C. polykrikoides in marine sediments, yellow clay dispersal seems to suppress the reduction state of Eh and the formation of volatile fatty acids(acetate, formate and propionate) used as an energy source by sulfate reducing bacteria, indicating that this process controls the production of hydrogen sulfide that negatively affects marine organisms and the marine sediment environment.

키워드

참고문헌

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