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Characteristics of manganese removal by ozonation: Effect of existing co-ion and optimum dosage

오존을 이용한 용존성 망간 제거 특성: 공존이온의 영향 및 최적주입량

  • Kwak, Yeonwoo (Department of Chemical Engineering, Soongsil University) ;
  • Lee, Seulki (Department of Chemical Engineering, Soongsil University) ;
  • Lee, Yongsoo (Department of Chemical Engineering, Soongsil University) ;
  • Hong, Seongho (Department of Chemical Engineering, Soongsil University)
  • Received : 2018.01.22
  • Accepted : 2018.03.19
  • Published : 2018.04.16

Abstract

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.

Keywords

References

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