Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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A Survey on Endocrine Disrupting Chemicals in Animal Wastes Treated with Methane Fermentation

메탄발효 처리된 가축분뇨내의 내분비계 장애물질에 대한 조사 연구

  • Ko, H.J. (Graduate School of Agriculture, Kyoto University) ;
  • Kim, K.Y. (Institute of Environment & Occupational Medicine, Hanyang University) ;
  • Kim, H.T. (Graduate School of Agriculture, Kyoto University) ;
  • Umeda, M. (Graduate School of Agriculture, Kyoto University)
  • Published : 2007.03.27
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Abstract

Concerns about endocrine disrupting chemicals emitted from humans and animals have been increased because these compounds are detected at very low levels in environment and adversely affect on indigenous fauna. To date, there is little information regarding the concentration of these compounds in animal wastes. In this study, the female hormones, $17\beta-estradiol$ (E2), estrone (E1) and estriol, were measured to provide baseline data in animal wastes. Samples were collected from animal waste storage, methane digester and sludge separated wastewater and analyzed by gas chromatography-mass spectrometry. To measure the mass ratios of estrogen to macronutrients, nitrogen and phosphorous were also determined. Sample collected from animal waste storage had the highest estrogen concentration (98.7 ${\mu}g/L$), while sludge separated wastewater had the lowest concentration (3.4 ${\mu}g/L$). The mean concentrations of E2 and E1 in waste storage sample were (6.8 ${\mu}g/L$) and (68.7 ${\mu}g/L$), respectively. In sludge separated wastewater, the mean concentration of both E2 and E1 were reduced to (2.6 ${\mu}g/L$) and (1.9 ${\mu}g/L$), respectively. However, estriol was not detected in any of the samples collected. Mean ratios of E2 and E1 to macronutrients were significantly different between the methane wastewater and sludge separated wastewater owing to elimination of solid particles.

인간과 가축에서 발생된 내분비계 장애물질들이 자연계로 유입되고, 매우 낮은 농도에서도 토착 동물군에 교란 작용을 유발시킬 수 있다는 잠재적 오염 가능성에 대한 우려가 증가되고 있다. 그러나 현재까지 가축분뇨 중의 내분비계 장애물질에 대한 연구는 거의 이루어지지 않았다. 따라서 본 연구는 이러한 장애물질 중 여성 호르몬으로 알려진 17베타-에스트 라디올, 에스트론, 에스트리올을 분석하여 분뇨 중 에스트로젠 농도에 대한 기초자료를 제공하고자 수행되었다. 공시시료는 생물생태센터의 분뇨 저장조, 메탄 소화조, 오니 제거조에서 수집하여 가스크로마토그래피 질량분석기를 이용하여 에스트로젠 농도를 분석하였다. 또한 에스트로젠 대 비료성분 질량비를 알아보기 위해 질소와 인산도 측정하였다. 분석 결과 가축분뇨 중에는 다량의 에스트로젠 호르몬이 존재하고 있었으며, 분뇨 저장조에서 98.7 ${\mu}g/L$로 가장 높은 농도를 보인 반면 오니 제거 소화액에서 가장 낮은 농도인 3.4 ${\mu}g/L$로 조사되었다. 분뇨 저장조에서 채취된 시료의 17베타-에스트라디올과 에스트론의 평균농도는 6.8 ${\mu}g/L$와 68.7 ${\mu}g/L$였고, 오니 제거조는 각각 2.6 ${\mu}g/L$ 및 1.9 ${\mu}g/L$로 분석되었다. 반면 에스트리올은 모든 시료에서 검출되지 않았다. 본 연구 조사는 가축분뇨내의 에스트로젠 농도에 대한 기초자료를 제공할 수 있으나 에스트로젠 호르몬의 저감 방안에 대한 기작을 설명하기에는 한계가 있다. 따라서 축종별로 적용되고 있는 분뇨관리 및 축사시설에 대해 시공간적 변이를 고려할 수 있는 광범위한 조사 연구와 더불어 여러가지 처리방법에 의해 농경지에 살포되고 있는 분뇨내의 에스트로젠 농도와 조성 및 생물학적 활성도에 대한 추가연구가 필요하다.

Keywords

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