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DOI : ,    Vol.22, No.4, 65 ~ 72, 2014
Title
Treatment of Orange Ⅱ Dye Wastewater by ZVI and Persulfate
최수민 Su Min Choi , 노병일 Byeong Il Noh , 문병현 Byung Hyun Moon
Abstract
In this study, the combined ZVI and persulfate treatment on the decolorization and CODCr removal efficiency of orange Ⅱ dye wastewater were evaluated. The results of the sequential ZVI reduction and persulfate oxidation process on the decolorization and CODCr removal efficiency were compared to those of the ZVI and the simultaneous ZVI and persulfate processes. For the ZVI process, optimum pH for decolorization was observed to be at 3. However, the removal of CODCr by a ZVI at optimum pH of 3 was not effective. The combined ZVI and persulfate process could mineralize orange Ⅱ dye wastewater to the higher removal efficiencies of CODCr than the ZVI process. The sequential ZVI reduction and persulfate oxidation process of orange Ⅱ dye wastewater showed that the reduction products of orange Ⅱ dye by ZVI were oxidized more rapidly by persulfate. This means that the sequential ZVI reduction and persulfate oxidation process is more effective to promote the degradation of orange Ⅱ dye wastewater.
Key Words
Acid orange II, Zero-Valent Iron, Persulfate, CODcr Removal
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