Degradation Of Aqueous Acid Red 183 Textile Dye And Acid Dye-bath Effluent By Fenton-like And Photo-fenton-like Advanced Oxidation Processes

摘要

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 (pH_o 2.8; Fe~(3+),o 3 mmol L~(-1); H_2O_2,o 30 mmol L~(-1) for 100 mg L~(-1) dye),whereas UV-A assisted Fenton-like treatment proceeded significantly faster. At pH_o 2.8,Fe~(3+),o 0.3 mmol L~(-1) and H_2O_2,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 Fe~(3+) concentrations,86-97% color removal accompanied with 47% COD abatement were obtained under the working conditions of pH_o 3; Fe~(3+).o 5 mmol L~(-1) and H_2O_2, o 30mmol L~(-1).