Naval derusting wastewater containing high concentration of iron, treated in
UV photo-Fenton-like oxidation |
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| Authors: | Daeik Kim Jason Kou-Chaw Chen and Teh Fu Yen |
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| Institution: | 1. Sonny Astani Department of Civil and Environmental Engineering, Viterbi School of Engineering, University of Southern California,KAP 210, 3620 South Vermont Avenue, Los Angeles, CA 90089, USA; BooKang Tech. Inc., Korea Building, 789-6 Yoksam Dong, Kangnam Ku, Seoul, Korea
2. Sonny Astani Department of Civil and Environmental Engineering, Viterbi School of Engineering, University of Southern California,KAP 210, 3620 South Vermont Avenue, Los Angeles, CA 90089, USA |
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| Abstract: | The UV photooxidation with Fe(III) and H2O2 was employed to treat a naval derusting wastewater, which contains the high COD
(chemical oxygen demand) and various metal concentrations exceptionally with high concentrations of citric acid and iron. Because
of its iron containment, the Fenton-like reaction automatically took place with the added amount of H2O2. The decomposition rate
was found in a sequence of: UV/H2O2/Fe(III) > UV/H2O2 > Fe(II)/H2O2. Two H2O2 injection methods, single and multiple points,
were evaluated. The multiple-point H2O2 injection was more e cient to decompose the citric acid. The decomposition of the synthetic
citric acid and the real derusting citric acid wastewater was also compared. The 93% COD reduction of the derusting wastewater was
achieved using the UV/H2O2/Fe(III) treatment. |
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| Keywords: | naval derusting wastewater citric acid UV photooxidation Fenton-like |
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