Ecotoxicity assessments with the physiochemical water quality items and the bioassay test using Daphnia magna were conducted for 18 selected effluents of 6 industrial types (metal processing, petroleum refining, synthetic textile manufacturing, plating, alcohol beverage manufacturing, inorganic compound manufacturing) being detected toxicity from industrial effluent in Ulsan city, and the interrelationship between total toxic unit (ΣTU) and concentrations of Water Quality Conservation Act in Korea were investigated. The average toxic unit(TU) of effluents for 6 industrial types displayed the following ascending order: petroleum refining (0.2) < synthetic textile manufacturing (0.6) < alcohol beverage manufacturing (0.9) < metal processing (1.3) ≤ inorganic compound manufacturing (1.3) < plating (3.0). These values were less than effluent permission standard. Based on the result of substances causing ecotoxicity, the correlation analysis was not easy because most of heavy metals were not detected or were less than effluent permission standard. Toxicological assessment of industrial effluent was suitable for the evaluation of the mixture toxicity for pollutant. The whole effluent toxicity test using a variety of species was needed for the evaluation of industrial wastewater.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험 범위
  2.2. 물벼룩(Water flea)
  2.3. 물벼룩 배양 및 급성독성시험
  2.4. 생태독성값 계산
  2.5. 표준독성시험
 3. 결과 및 고찰
  3.1. 업종별 생태독성평가
  3.2. 금속가공제품 제조시설(MP)
  3.3. 석유정제품 제조시설(PR)
  3.4. 화학섬유 제조시설(SM)
  3.5. 도금시설(PI)
  3.6. 알콜음료 제조시설(AM)
  3.7. 기초무기화합물 제조시설(IM)
  3.8. 업종별 물벼룩 독성값과 오염물질 농도와의 상관관계 분석
 4. 결 론
 참고문헌

• 이선희(울산보건환경연구원) | Sun Hee Lee (Ulsan Institute of Health & Environment)
• 이학성(울산대학교 화학공학부) | Hak Sung Lee (School of Chemical Engineering, University of Ulsan) Corresponding author