The aim in this study was to remove Cl−, which can be problematic in the recycling of bottom ash, by identifying the optimum operating conditions for a soil electrolysis apparatus with spiral paddles and to use these as the base data in removing contaminants from various polluted soils using electrolysis. Unprocessed bottom ash collected from the openair storage yard at thermoelectric power plant H in Gyeong sang nam - do Province was used as the experimental material. The experimental methodology was to identify the optimum operating conditions to remove Cl− contained in the bottom ash using the following variables: use or not of spiral paddles, application or not of electrolysis, change of concentration of the electrolyte solution, electrolysis application time, and the voltage level during electrolysis. From the results, the highest removal efficiency of 91.4% was shown under the following conditions: use of the spiral paddles, use of 0.3% NaOH electrolyte solution, 20 min of electrolysis; and a voltage level of 5 V during electrolysis. It is evident that application of the soil electrolysis apparatus for removal of Cl− from bottom ash could be valuableas base data for purification of polluted soils in the future.

I. 서 론
 II. 실험재료 및 방법
  1. 실험재료
  2. 실험장치 및 방법
 III. 결과 및 고찰
  1. 패들 적용 유·무에 따른 Cl− 제거특성
  2. 전기분해 적용 유·무에 따른 Cl− 제거특성
  3. 전해질용액 농도 변화에 따른 Cl− 제거특성
  4. 전기분해 시간변화에 따른 Cl− 제거특성
  5. 전기분해 전압변화에 따른 Cl− 제거특성
 IV. 결 론
 References

• 정진희(동아대학교 환경공학과, Department of Environmental Engineering, Dong-A University) | Jin-Hee Jung
• 최영익(동아대학교 환경공학과, Department of Environmental Engineering, Dong-A University) | Young-Ik Choi
• 이준희(동아대학교 환경공학과, Department of Environmental Engineering, Dong-A University) | Jun-Hee Lee Corresponding author