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KMID : 1024520040130110987
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Journal of the Environmental Sciences
2004 Volume.13 No. 11 p.987 ~ p.991
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Evaluation of Effective Process Operation for the Texitile Dyeing Wastewater by Ferrous Solution and Hydrogen Peroxide
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Lee Sang-Ho
Moon Hey-Jin
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Abstract
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The purpose of this research is to evaluate the removal efficiencies of CODCr/ and color for the dyeing wastewater by the different dosages of ferrous solution and HO in Fenton process. In the case of HO divided dosage for the Fenton’s reagent 7:3 of HO was more effective than 3:7 to remove CODCr/ and color. The results showed that CODCr/ was mainly removed by Fenton coagulation, where the ferric ions are formed in the initial step of Fenton reaction. On the other hand color was removed by Fenton oxidation rather than Fenton coagulation. The removal mechanism of CODCr/ and color was mainly coagulation by ferrous ion, ferric ion and Fenton oxidation. The removal efficiencies were dependent on the ferric ion amount at the beginning of the reaction. However, the final removal efficiency of CODCr/ and color was in the order of Fenton oxidation, ferric ion coagulation and ferrous ion coagulation. The reason of the highest removal efficiency by Fenton oxidation can be explained by the chain reactions with ferrous solution, ferric ion and hydrogen peroxide.
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KEYWORD
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Fenton oxidation, Coagulation, Removal efficiency, Textile dyeing wastewater treatment
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