Effect of Fe2+ on catalytic oxidation in a fluidized bed reactor

Thermodynamics and kinetics of adsorption of Cu(II) onto waste iron oxide

“…The molar ratio of H 2 O 2 to FeSO 4 was 3.2:1. The pH of the solution, which was adjusted by adding dilute aqueous solutions of NaOH or H 2 SO 4 , was maintained at 3, to prevent the precipitation of Fe(OH) 3 [19]. The crystals were grown onto the surface of the activated alumina grains, i.e.…”

“…Iron oxide has a relatively high surface area and charge; numerous researchers have used iron oxide as an adsorbent to treat heavy metals and organic compounds from wastewater [14][15][16][17][18]. This study elucidates the F1 adsorbent, which is from the FBR-Fenton process [19,20], for use in treating wastewater from dyeing/finishing plants in Taiwan. This process not only provides a high COD removal efficiency but also reduces the large amount of Fe sludge produced [19].…”

“…This study elucidates the F1 adsorbent, which is from the FBR-Fenton process [19,20], for use in treating wastewater from dyeing/finishing plants in Taiwan. This process not only provides a high COD removal efficiency but also reduces the large amount of Fe sludge produced [19]. However, the iron oxide must be taken out from the FBR after an extended reaction; meanwhile, repacked activated alumina supports for fluidizing.…”

Kinetics of nitrobenzene oxidation and iron crystallization in fluidized-bed Fenton process

“…The pH below or above this range deteriorated the crystallization process. Chou and Huang [19] studied the oxidation of benzoic acid under different pH from 3.0 to 5.5 in a fluidized-bed Fenton reactor and found that the optimum pH for iron removal was 4.5. Chou et al [7] found that the iron crystallization became worsen as the pH was above 4 due to the interference from ferric hydroxide precipitates.…”

Novel activated alumina-supported iron oxide-composite as a heterogeneous catalyst for photooxidative degradation of reactive black 5

“…In this work, an activated alumina-supported iron oxidecomposite was prepared by FBR-crystallization technique [23][24][25][26], which is cost-effective and has been used full-scale in industrial applications in Taiwan. Activated alumina-supported iron oxide-composite was originally developed as a heterogeneous catalyst of the degradation of RB5 in the presence of H 2 O 2 and UVA light.…”