摘要：Online sp ectrophotometric technique was adopted to monitor the degradation of simulated Reactive Red B-2BF (RR B-2BF) solution with Fenton oxidation process. The effects of initial FeSO_4 dosage, initial H_2O_2 dosage, pH value, and initial dye concentration on chroma removal have been discussed. The kinetic mechanics of the de- colorization of RR B-2BF, the decolorization rate (R) and the constant (k_(ap)) were investigated. The results show that the color removal rate of RR B- 2BF is 93.47% under the optimum dosage of H_2O_2 0.96 mM，pH 4.0, FeSO_4 (Fe~(2+)) dosage 0.09 mM， and the initial dye concentration 16 mg/L after 300 s. The chroma removal process can be divided into two stages. The intrinsic reaction rate constant of OH with RR B-2BF in aqueous solution is 2.09 x10~9 M~(-1)s~(-1) in Fenton oxidation process. The molecule structure of RR B-2BF is decomposed and not mineralized thoroughly in Fenton oxidation process (300 s). Online spectrophotometric technique is an accurate, fast, and feasible technique to monitor color removal rate of RR B-2BF with Fenton process.
关键词：Fenton oxidation process;Reactive Red B-2BF;kinetics;wastewater;online spectrophotometry;decolorization
