Development and optimization of dark Fenton oxidation for the treatment of textile wastewaters with high organic load.
The examination of the effectiveness of the chemical oxidation using Fenton's reagent (H(2)O(2)/Fe(2+)) for the reduction of the organic content of wastewater generated from a textile industry has been studied. The experimental results indicate that the oxidation process leads to a reduction in the chemical oxygen demand (COD) concentration up to 45%. Moreover, the reduction is reasonably fast at the first stages of the process, since the COD concentration is decreased up to 45% within four hours and further treatment time does not add up to the overall decrease in the COD concentration (48% reduction within six hours). The maximum color removal achieved was 71.5%. In addition, the alterations observed in the organic matter during the development of the process, as indicated by the ratios of COD/TOC and BOD/COD and the oxidation state, show that a great part of the organic substances, which are not completely mineralized, are subjected to structural changes to intermediate organic by-products.
Papadopoulos
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AE
School of Chemical Engineering, National Technical University of Athens, 9, Heroon Polytechniou Street, 15773 Zografou, Athens, Greece. achipap@orfeas.chemeng.ntua.gr
Fatta
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Loizidou
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D002244:Carbon / Q000032:analysis; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D007220:Industrial Waste; D016877:Oxidants; D014874:Water Pollutants, Chemical; D002244:Carbon; D006861:Hydrogen Peroxide; D007501:Iron