Ti/Ir 전극을 이용한 폐절삭유의 T-N 제거 = Removal of T-N from Wasted Soluble Cutting Fluids (SCF) using Ti/Ir Electrode

다국어 초록 (Multilingual Abstract)

The mother machine makes the necessary shape by processing materials such as metal. The SCFs are applied to theprocessing surface when the mother machine processes the material, thereby improving the cutting conditions. SCFscontain high concentrations of organic components and nitrogen compounds, which can cause problems such aseutrophication and algae bloom. Therefore, proper treatment is required. Electrochemical treatment is expected to be analternative to conventional processes, and to be useful in various wastewater treatments. Moreover, it is an efficientelimination technique for contaminants and has a simple equipment composition. In this study, the removal efficiency ofthe T-N contained in the waste SCF using electrochemical treatment is analyzed. The electrode was made of titaniumand iridium, made into a perforated metal sheet to prevent an imbalance of the sample concentration in the reactor.
Experiments were conducted to examine the effects of current density and the concentration of the supporting electrolyte(NaCl, Na2SO4) on removal efficiency. In the cases with 60 A/m2, 80 A/m2, and 100 A/m2 current densities, the removalefficiencies of the T-N contained in the waste SCF were 51.03%, 68.83%, and 79.58%. Comparing between the additionand non-addition of NaCl, the removal efficiency with the addition of NaCl (5 ~ 10 mM) was higher than for no additionat 60 min for all current densities. The addition of Na2SO4 increased the removal rate of the T-N, but it was less effectivethan NaCl addition

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