The Electrocoagulation-Flotation (ECF) process has great potential in wastewater treatment. ECF technology is effective in the removal of colloidal particles, oil-water emulsion, organic pollutants such as microalgae, and heavy metals. Numerous studies have been conducted on ECF; however, many of them used a conventional plate-type aluminum anode. In this study, we determined the effect of changing operational parameters such as power supply time, applied current, NaCl concentration, and pH on the turbidity removal efficiency of kaoline. We also determined the effects of different electrolyte types (NaCl, MgSO4, CaCl2, Na2SO4, and tap water), as well as the differences caused by using a plate-type and mesh-type aluminum anode, on the turbidity removal efficiency. The results showed that the optimal values of ECF time, applied current, NaCl concentration, and pH were 5 min, 0.35 A, 0.4 g/L NaCl in distilled water, and pH 7, respectively. The results also revealed that the turbidity removal efficiency of kaoline in different electrolytes decreased in the following sequence, given the same conductivity: tap water > CaCl2 > MgSO4 > NaCl > Na2SO4. The turbidity removal efficiency of the mesh-type aluminum anode was significantly greater than the plate-type aluminum anode.

Abstract
 1. 서 론
 2. 실험재료 및 방법
  2.1. 실험방법
  2.2. 분석 및 측정방법
 3. 실험결과 및 고찰
  3.1. 탁도 제거율에 미치는 전원 공급시간의 영향
  3.2. 탁도 제거율에 미치는 전류의 영향
  3.3. 탁도 제거율에 미치는 전해질 농도와 전해질 종류의영향
  3.4. 탁도 제거율에 미치는 pH의 영향
  3.5. 탁도 제거율에 미치는 알루미늄 전극 형태의 영향
 4. 결 론
 REFERENCES

• 정창(대구가톨릭대학교 환경과학과) | Chang Zheng (Department of Environmental Science, Catholic University of Daegu)
• 김동석(대구가톨릭대학교 환경과학과) | Dong-Seog Kim (Department of Environmental Science, Catholic University of Daegu)
• 박영식(대구대학교 기초교육대학) | Young-Seek Park (DU University College, Daegu University) Corresponding author