In this study, FeVO4 was prepared and used as Fenton-like catalyst to degrade orange G （OG） dye. The removal of OG in an aqueous solution containing 0.5 g.L l FeVO4 and 15 mmol.L ] hydrogen peroxide at pH 7.0 reache...In this study, FeVO4 was prepared and used as Fenton-like catalyst to degrade orange G （OG） dye. The removal of OG in an aqueous solution containing 0.5 g.L l FeVO4 and 15 mmol.L ] hydrogen peroxide at pH 7.0 reached 93.2%. Similar rates were achieved at pH 5.7 （k = 0.0471 min-1） pH 7.0 （k= 0.0438 min-1）, and pH 7.7 （k = 0.0434 min-1）. The FeWO4 catalyst successfully overcomes the problem faced in the heterogeneous Fenton process, i.e., the narrow working pH range. The data for the removal of OG in FeVO4 systems containing H202 conform to the Langmuir-Hinshelwood model （R2 = 0.9988）, indicating that adsorption and surface reaction are the two basic mechanisms for OG removal in the FeVO4 H202 system. Furthermore, the irradiation of FeVO4 by visible light significantly increases the degradation rate of OG, which is attributed to the enhanced rates of the iron cycles and vanadium cycles.展开更多
文摘In this study, FeVO4 was prepared and used as Fenton-like catalyst to degrade orange G （OG） dye. The removal of OG in an aqueous solution containing 0.5 g.L l FeVO4 and 15 mmol.L ] hydrogen peroxide at pH 7.0 reached 93.2%. Similar rates were achieved at pH 5.7 （k = 0.0471 min-1） pH 7.0 （k= 0.0438 min-1）, and pH 7.7 （k = 0.0434 min-1）. The FeWO4 catalyst successfully overcomes the problem faced in the heterogeneous Fenton process, i.e., the narrow working pH range. The data for the removal of OG in FeVO4 systems containing H202 conform to the Langmuir-Hinshelwood model （R2 = 0.9988）, indicating that adsorption and surface reaction are the two basic mechanisms for OG removal in the FeVO4 H202 system. Furthermore, the irradiation of FeVO4 by visible light significantly increases the degradation rate of OG, which is attributed to the enhanced rates of the iron cycles and vanadium cycles.
