Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Turbidity Removal of Kaolin in an Electrocoagulation/Flotation Process Using a Mesh-type Aluminum Electrode

메시형 알루미늄 전극을 이용한 전기응집/부상 공정에서 Kaoline의 탁도 제거

  • Zheng, Chang (Department of Environmental Science, Catholic University of Daegu) ;
  • Kim, Dong-Seog (Department of Environmental Science, Catholic University of Daegu) ;
  • Park, Young-Seek (DU University College, Daegu University)
  • 정창 (대구가톨릭대학교 환경과학과) ;
  • 김동석 (대구가톨릭대학교 환경과학과) ;
  • 박영식 (대구대학교 기초교육대학)
  • Received : 2017.01.18
  • Accepted : 2017.03.13
  • Published : 2017.05.31
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Abstract

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, $MgSO_4$, $CaCl_2$, $Na_2SO_4$, 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 > $CaCl_2$ > $MgSO_4$ > NaCl > $Na_2SO_4$. The turbidity removal efficiency of the mesh-type aluminum anode was significantly greater than the plate-type aluminum anode.

Keywords

References

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