On-line Spectrophotometric Method for Decolourizing Reaction Kinetics of Reactive Black 5 by Fenton Oxidation

Degradation of Azo Dye Reactive Black 5 and Acid Orange 7 by Fenton-Like Mechanism

Application of Fenton Oxidation Process for Degradation of Reactive Black 5 in Aqueous System

In the study, Reactive Black 5 (RB5) was removed from synthetic wastewater using Fenton's oxidation (FO) process. Batch experiments were conducted on the samples containing 50, 250 and 500 mg/L of RB5. The study was performed in the systematic optimum value of H2O2 and FeSO4 concentrations, pH and temperature. Optimum pH and temperature for 250 mg/L RB-5 were observed at 3.0 and 40°C respective...

Fenton oxidation of Reactive Black 5: effect of mixing intensity and reagent addition strategy.

This study investigates the effect of mixing intensity and reagents addition strategy on Fenton's reagent degrading a common reactive diazo type dyestuff, Reactive Black 5. Within the experimental conditions used in the study, the effect of mixing intensity on TOC removal was observed to be both significant and complex. Using factorial analysis, it was found that if the reagents are added near ...

Evaluation of Fenton oxidation process coupled with biological treatment for the removal of reactive black 5 from aqueous solution

Biodegradation of azo dyes is difficult due to their complex structures and low BOD to COD ratios. In the present study, the efficiency of using Fenton's reagent (H2O2 + Fe2+) as a pretreatment process to enhance microbial transformation of reactive black 5 (RB5) in an aqueous system was evaluated. The RB5 with an initial concentration of 250 mg/L was decolorized up to 90% in 60 h by using a ba...

SPECTROPHOTOMETRIC REACTION RATE METHOD FOR THE DETERMINATION OF NITRITE BY CATALYTIC ACTION ON NILE BLUE A BROMATE REACTION

A kinetic method developed for the determination of ultra-trace amounts of nitrite based on its catalytic effect on the reaction between potassium bromate and Nile blue A in strongly acidic media is reported. The reaction was monitored spectrophotometrically by measuring the decrease in absorbance of Nile blue A at 645 nm by the fixed-time method. The decrease in absorbance during the first...