Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Effect of Effluent Organic Matters on Estrogenic Activity Reduction of Bisphenol A by Photolysis

광분해 반응에 의한 비스페놀 A의 에스트로겐 활성 저감에 미치는 방류수 유기물질의 영향

  • Yoo, Jisu (Division of Environmental Science & Ecological Engineering, Korea University) ;
  • Na, Joolim (Division of Environmental Science & Ecological Engineering, Korea University) ;
  • Jung, Jinho (Division of Environmental Science & Ecological Engineering, Korea University)
  • 유지수 (고려대학교 생명과학대학 환경생태공학과) ;
  • 나주림 (고려대학교 생명과학대학 환경생태공학과) ;
  • 정진호 (고려대학교 생명과학대학 환경생태공학과)
  • Received : 2016.02.01
  • Accepted : 2016.02.15
  • Published : 2016.03.31
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Abstract

This study investigates the effect of effluent organic matter (EfOM) from sewage wastewater treatment plants on estrogenic activity reduction of bisphenol A (BPA) by UV photolysis. The EfOM and Suwannee River natural organic matter (SR-NOM) as reference were isolated into hydrophobic (HPO), transphilic (TPI) and hydrophilic (HPI) fractions depending on polarity. The specific ultraviolet absorbance (SUVA) analysis indicated that EfOM showed similar properties to microbially derived organic matters with low hydrophobicity, which is different from SR-NOM having high hydrophobicity. UV irradiation upto 3 hr significantly reduced SUVA values of both EfOM and SR-NOM (p<0.0001), depending on the polarity of organic matters. In the absence of organic matters, the relative estrogenic activity (REA) of BPA ($5.0{\times}10^{-5}M$) was decreased from 86% to 63% by UV photolysis (2 hr). However, the decrease of mean REA was from 68% to 37% in the presence of organic matters, which was significantly independent on the type (EfOM or SR-NOM) and polarity (HPO, TPI or HPI) of organic matters (p>0.05). As a result, the reduced REA by UV photolysis of BPA with and without organic matters was 31% and 23%, respectively, suggesting that both EfOM and SR-NOM accelerated the photolytic reduction of BPA estrogenic activity.

본 연구는 자외선 광분해에 의한 비스페놀 A (BPA)의 에스트로겐 활성 저감에 미치는 하수처리장 방류수 유기물질의 영향을 조사하였다. 방류수 유기물질과 표준으로 사용한 스와니강 자연 유기물질은 극성에 따라 소수성, 반친수성, 친수성 분획으로 분리하였다. 특이 자외선 흡수 (SUVA) 분석 결과, 방류수 유기물질은 높는 소수성을 가지고 있는 자연 유기물질과 다르게 소수성이 낮은 미생물 기원 유기물질과 유사한 특성을 나타내었다. 3시간의 자외선 조사는 방류수 및 자연 유기물질의 극성에 따라 SUVA 값을 유의하게 감소시켰다 (p<0.0001). 유기물질이 없는 조건에서, BPA($5.0{\times}10^{-5}M$)의 상대 에스트로겐 활성도는 자외선 광분해에 의해 86%에서 63%로 감소하였다. 그러나 유기물질이 있는 조건에서 상대 에스트로겐 활성도는 평균적으로 68%에서 37%로 감소하였으며, 유기물질의 종류 (방류수 또는 자연유기물질) 및 극성 (소수성, 반친수성, 친수성)과 유의한 차이를 나타내지 않았다 (p>0.05). 결과적으로, 유기물질이 있고 없는 조건에서 자외선 광분해에 의해 감소한 BPA의 상대 에스트로겐 활성도는 각각 31%와 23%였으며, 이것은 방류수와 자연 유기물질 모두 광분해에 의한 BPA의 에스트로겐 활성 저감을 촉진시킨다는 것을 제시한다.

Keywords

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