고도산화-응집공정에 의한 복합도금폐수의 고농도유기물 및 중금속 제거 = The Removal of High Concentration Organics and Heavy Metals from Composite Plating Wastewater by Advanced Oxidation Processes with Coagulation

다국어 초록 (Multilingual Abstract)

Recently plating industry has a tendency to introduce a composite plating process to help reduce costs and simplify metal plating process. However, the treatability of a composite plating wastewater containing complexed heavy metals as nickel and zinc by conventional coagulation process has a limit. Therefore, the study focused on the effect of operation parameters on each system treatability performance in terms of nickel and zinc and organics, and then is to research the optimum process. The proposed processes were experimentally investigated in a combined system of the lab-scale advanced oxidation processes(AOPs) as Fenton or Fenton-like and Electrolysis-Fenton/Fenton-like with coagulation. The results indicated that all proposed processes in this study could be almost removed Zn completely and an electro-Fenton process with hydroxide precipitation was the best among these processes. In the field wastewater test of that process, a value of obtained results was observed with Ni 48.2mg/L to 10.3mg/L, Zn 126.7mg/L to 0.6mg/L, and COD_Mn is shown to be reduced from 2560mg/L to 230.4mg/L. The optimum operating condition for the electro-Fenton process was as follows; the electrolysis reaction time 10min, an applied current density of 3.74mA/cm² at bipolar type reactor packed by granular activated carbon(GAC) and Fenton`s reaction time 60min at the initial pH 5.0 and Fe(II)/H₂O₂ 20mM/600mM.

참고문헌 (Reference)

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