摘要：Online spectrophotometric technique is used to monitor the decolorization of Reactive Yellow B-4RFN (RY B-4RFN) in aqueous solution by Fenton reagent oxidation. The effects of dosages of Fe2+, H2O2 concentration, pH value, and concentration of dye have been examined. The results show that online monitoring technology is a quick, accurate, and convenient method to record detailed decolorization information of RY B-4RFN in Fenton process. The color removal process can be divided into two stages. The optimum conditions were determined as [H2O2] = 3.98 mM, [Fe2+] = 0.0512 mM, pH = 3.8 for RY B-4RFN decolorization during the Fenton oxidation process. The decolorization rate is 72.15% under this condition. The intrinsic reaction rate constant of OH with RY B-4RFN in solution is 3.71x1011M-1 s1. The chemical structure of RY B-4RFN is destroyed and not fully mineralized by Fenton agent in 300 s.
