Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Sediment Toxicity Assessment of Pesticides using Chironomus riparius Acute and Chronic Effect

Chironomus riparius의 급성 및 만성영향에 의한 농약의 퇴적토 독성평가

  • Park, Jung-eun (Department of Applied Biotoxicology.Department of Pharmaceutical Engineering, Graduate School of Hoseo University) ;
  • Hwang, Eun-Jin (Department of Applied Biotoxicology.Department of Pharmaceutical Engineering, Graduate School of Hoseo University) ;
  • Chang, Hee-Ra (Department of Applied Biotoxicology.Department of Pharmaceutical Engineering, Graduate School of Hoseo University)
  • 박정은 (호서대학교 바이오응용독성학과.제약공학과) ;
  • 황은진 (호서대학교 바이오응용독성학과.제약공학과) ;
  • 장희라 (호서대학교 바이오응용독성학과.제약공학과)
  • Received : 2017.06.12
  • Accepted : 2017.06.23
  • Published : 2017.06.30
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Abstract

BACKGROUND: Pesticides is exposed in an aquatic environment and effected to benthic animals. Especially, sediment-associated pesticides is required for determination of sediment toxicity on aquatic organisms. This study was conducted to evaluate the impact of six pesticides (chlorfluazuron, difenoconazole, dithianon, flufenoxuron, flutianil, pendimethalin) on Chironomus riparius in aquatic ecosystems. METHODS AND RESULTS: Chlorfluazuron, difenoconazole, dithianon, flufenoxuron, flutianil and pendimethalin were used as a model compounds, which have a sediment-associated potential ($K_{oc}$>3). Acute and chronic toxicity tests on Chironomus riparius were performed at six concentrations of each pesticide with four replicates of each based on OECD test guideline 235 and 218. The calculated 48-h $EC_{50}$ values of chlorfluazuron, flutianil, pendimethalin, difenoconazole, dithianon and flufenoxuron were 6.72, 2.55, 2.27, 0.77, 0.30 and 0.11 mg/L, respectively. Flufenoxuron was the lowest 48-h $EC_{50}$ value in this study. The No Observed Effective Concentration (NOEC) and the Lowest Observed Effect Concentration (LOEC) of flufenoxuron for Chironomus riparius in 28-days test were 30 and $60{\mu}g/kg$, respectively. CONCLUSION: Pesticides of the sediment-associated have the potential effect for Chironomus riparius in aquatic ecosystems. Therefore, sediment toxicity assessment of these pesticides should be further investigated to evaluate the impact to benthic organisms.

Keywords

References

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