Abstract
The present experimental study aimed at investigating color and organic carbon (TOC, COD) removal from the chromium(III)-complex azo dye Acid Red 183 and a simulated acid dye-bath effluent using Fenton-like and Photo-Fenton-like processes. In the case of Acid Red 183 dye, the Fenton-like reagent was capable of 98% color and 56% TOC removal, after 40 min treatment under optimized working conditions (pHo 2.8; Fe3+,o 3 mmol L -1; H2O2,o 30 mmol L-1 for 100 mg L-1 dye), whereas UV-A assisted Fenton-like treatment proceeded significantly faster. At pHo 2.8, Fe3+,o 0.3 mmol L-1 and H2O2,o 30 mmol L-1, 48% color and 14% TOC removal rates were achieved after 20 min of Photo-Fenton-like oxidation of 100 mg L-1 aqueous Acid Red 183, instead of only 23% color and 6% TOC removals obtained by the dark Fenton-like treatment for the same reaction period. For the simulated acid dye-bath effluent subjected to Fenton-like treatment at varying Fe3+ concentrations, 86-97% color removal accompanied with 47% COD abatement were obtained under the working conditions of pHo 3; Fe3+,o 5 mmol L -1 and H2O2,o 30 mmol L-1.
Original language | English |
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Pages (from-to) | 915-926 |
Number of pages | 12 |
Journal | Fresenius Environmental Bulletin |
Volume | 17 |
Issue number | 7 B |
Publication status | Published - 2008 |
Keywords
- Acid dye-bath effluent
- Acid Red 183
- Color, COD and TOC removals
- Fenton-like and Photo-Fenton-like advanced oxidation processes