Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Acute and Chronic Ecotoxicity Assessment of Ambient and Effluent Water Discharged to the Lake Shihwa

시화호로 유입되는 지표수 및 방류수의 급·만성 생태독성평가

  • Ji, Kyunghee (School of Public Health, Seoul National University) ;
  • Jang, Shinhye (School of Public Health, Seoul National University) ;
  • Kim, Youngsook (School of Public Health, Seoul National University) ;
  • Kim, Eunjoo (School of Public Health, Seoul National University) ;
  • Kim, Jiyoung (School of Public Health, Seoul National University) ;
  • Seo, Eunjung (School of Public Health, Seoul National University) ;
  • Park, Yoonsuk (School of Public Health, Seoul National University) ;
  • Park, Sujung (School of Public Health, Seoul National University) ;
  • Choi, Kyungho (School of Public Health, Seoul National University)
  • 지경희 (서울대학교 보건대학원 환경보건학과) ;
  • 장신혜 (서울대학교 보건대학원 환경보건학과) ;
  • 김영숙 (서울대학교 보건대학원 환경보건학과) ;
  • 김은주 (서울대학교 보건대학원 환경보건학과) ;
  • 김지영 (서울대학교 보건대학원 환경보건학과) ;
  • 서은정 (서울대학교 보건대학원 환경보건학과) ;
  • 박윤석 (서울대학교 보건대학원 환경보건학과) ;
  • 박수정 (서울대학교 보건대학원 환경보건학과) ;
  • 최경호 (서울대학교 보건대학원 환경보건학과)
  • Received : 2006.10.25
  • Accepted : 2006.12.29
  • Published : 2007.01.30
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Abstract

The acute and chronic toxicity of ambient and effluent water discharged to Lake Shihwa were investigated by using Vibrio fischeri, Daphnia magna and Oryzias latipes. Physicochemical characteristics including biochemical oxygen demand (BOD) and nine heavy metals in a total of 15 water samples were evaluated and were satisfied with relevant Korean Water Quality Standards (KWQS) except for Hg in one sample. Acute toxicity was observed in five samples collected from three sampling locations. When impacts on reproduction and growth after chronic exposure were evaluated with D. magna, all the samples showed significant chronic effects. Reproduction appeared relatively more sensitive endpoint. In 21 days chronic tests on O. latipes, survival, mean egg number per female per day, hatching success rate and time to hatch were affected by increasing sample concentration. The organ-level changes such as gonadosomatic index (GSI), and hepatosomatic index (HSI), and molecular biomarker of vitellogenin (Vtg) induction that evaluated with O. latipes increased as exposure concentrations increased. It is noteworthy that the samples that did not exceed the KWQS resulted in acute and chronic toxicities. The results suggested that numeric criteria based on physicochemical parameters may not be protective of aquatic ecosystem. Acute and chronic toxicity tests with organisms representing different trophic groups should be supplemented in order to provide adequate level of environmental protection.

Keywords

Acknowledgement

Supported by : 서울대학교

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