This study is focused on manganese (Mn(II)) removal by ozonation in surface water. Instant ozone demand for the water was 0.5 mg/L in the study. When 0.5 mg/L of Mn(II) is existed in water, the optimum ozone concentration was 1.25 mg/L with reaction time 10 minutes to meet the drinking water regulation. The ozone concentration to meet the drinking water regulation was much higher than the stoichiometric concentration. The reaction of soluble manganese removal was so fast that the reaction time does not affect the removal dramatically. When Mn(II) is existed with Fe, the removal of Mn(II) was not affected by Fe ion. However As(V) is existed as co-ion the removal of Mn(II) was decreased by 10%. Adding ozone to surface water has limited effect to remove dissolved organic matter. When ozone is used as oxidant to remove Mn(II) in the water, the existing co-ion should be evaluated to determine optimum concentration.

ABSTRACT
 1. 서 론
 2. 연구방법
  2.1 실험재료
  2.2 실험방법
 3. 결과 및 고찰
  3.1 원수에서 오존의 감소 특성
  3.2 저농도 오존에 의한 망간의 제거
  3.3 고농도 오존 주입에 따른 용존성 망간의 제거
  3.4 철이온이 공존하는 경우에 망간의 제거
  3.5 철과 비소가 공존하는 경우에 망간 제거
  3.6 오존에 의한 용존유기물질의 제거
 4. 결 론
 사 사
 References

• 곽연우(숭실대학교 화학공학과, Department of Chemical Engineering, Soongsil University) | Yeonwoo Kwak
• 이슬기(숭실대학교 화학공학과, Department of Chemical Engineering, Soongsil University) | Seulki Lee
• 이용수(숭실대학교 화학공학과, 보야스 에너지, Department of Chemical Engineering, Soongsil University, Boyaz Energy) | Yongsoo Lee
• 홍성호(숭실대학교 화학공학과, Department of Chemical Engineering, Soongsil University) | Seongho Hong Corresponding author