Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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A Effect of Heavy Metal to Toxicity of Triclosan Focused on Vibrio fischeri Assay

Triclosan의 독성에 중금속이 미치는 영향 - V. fischeri Assay 관련 내용 중심으로 -

  • Kim, Ji-Sung (Department of Construction Environment Engineering, University of Science and Technology) ;
  • Kim, Il-Ho (Department of Construction Environment Engineering, University of Science and Technology) ;
  • Lee, Woo-Mi (Geum River Basin Environmental Office) ;
  • Lee, Hye-In (Environmental Engineering Research Division, Korea Institute of Construction Technology) ;
  • Kim, Seok-Gu (Department of Construction Environment Engineering, University of Science and Technology)
  • 김지성 (과학기술연합대학원대학교 건설환경공학과) ;
  • 김일호 (과학기술연합대학원대학교 건설환경공학과) ;
  • 이우미 (금강유역환경청) ;
  • 이혜인 (한국건설기술연구원 수자원.환경 연구본부 환경연구실) ;
  • 김석구 (과학기술연합대학원대학교 건설환경공학과)
  • Received : 2013.11.15
  • Accepted : 2014.02.17
  • Published : 2014.03.31
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Abstract

The purpose of this study is to evaluate effect of heavy metals (i.e., $Cu^{2+}$, $Zn^{2+}$, $Cr^{6+}$, $Cd^{2+}$, $Hg^{2+}$, and $Pb^{2+}$) to toxicity of Triclosan as binary mixture. The individual toxicity and combined toxic effects of Triclosan with heavy metals were evaluated by Vibrio fischeri assay. In individual toxicity, the $Hg^{2+}$ was found to be most toxic followed by Triclosan, $Pb^{2+}$, $Cr^{6+}$, $Cu^{2+}$, $Zn^{2+}$, and $Cd^{2+}$, respectively. To evaluate combined toxic effect, correlation analysis of 'predicted value' calculated by Concentration addition (CA) model and Independent action (IA) model with 'experimental value' were performed based on the toxicity of individual compound. As a result, all of the combinations showed that IA model were more correlated with experimental value than CA model. On the basis of the median effect concentration of combination ($EC_{50mix}$) predicted by IA model, experimental $EC_{50mix}$ of Triclosan + Cu, Triclosan + Zn, Triclosan + Pb, Triclosan + Hg, Triclosan + Cd, and Triclosan + Cr were 191%, 226%, 138%, 137%, 209%, and 138% of $EC_{50mix}$ predicted by IA model, respectively, indicating that all of the combinations produced antagonistic effect.

본 연구에서는 합성 항균제로 이용되는 Triclosan이 $Cu^{2+}$, $Zn^{2+}$, $Cr^{6+}$, $Cd^{2+}$, $Hg^{2+}$, $Pb^{2+}$ 등과 같은 중금속과 공존할 경우의 독성영향을 발광박테리아인 Vibrio fischeri를 이용하여 평가하였다. 우선, Triclosan과 상기 6종 중금속의 단일물질별 Vibrio fischeri에 대한 독성을 평가한 결과, $Hg^{2+}$의 독성이 가장 높았으며 뒤이어 Triclosan > $Pb^{2+}$ > $Cu^{2+}$ > $Cr^{6+}$ > $Zn^{2+}$ > $Cd^{2+}$순의 독성민감도가 나타났다. 각 물질의 독성평가결과를 바탕으로 Triclosan과 중금속 혼합물질의 독성작용분석을 위해 유사한 독성작용을 가정하여 독성치를 예측하는 Concentration Addition (CA)모델과 독립적인 독성작용을 가정하여 독성치를 예측하는 Independent Action (IA)모델에 대한 상관도분석을 실시하였다. 그 결과 Triclosan + Cu, Triclosan + Zn, Triclosan + Pb, Triclosan + Hg, Triclosan + Cd, 그리고 Triclosan + Cr 등 모든 조합에서 CA모델보다는 IA모델과 상관성이 높은 것으로 나타나 Triclosan과 대상 중금속들은 서로 독립적인 독성작용을 하는 것으로 나타났다. 한편 Triclosan과 중금속의 혼합독성영향은 IA모델로 예측된 $EC_{50mix}$기준으로 Triclosan + Cu, Triclosan + Zn, Triclosan + Pb, Triclosan + Hg, Triclosan + Cd, 그리고 Triclosan + Cr의 실측 $EC_{50mix}$이 IA모델로 예측한 농도보다 각각 191%, 226%, 138%, 137%, 209% 그리고 138%로 나타나, Triclosan과 시험 중금속이 공존하는 경우, 모두 길항작용이 나타나는 것으로 확인되었다.

Keywords

References

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