Advanced oxidation of cork‐processing wastewater using Fenton's reagent: kinetics and stoichiometry

Abstract

This work evaluates Fenton oxidation for the removal of organic matter (COD) from corkprocessing wastewater. The experimental variables studied were the dosages of iron salts and hydrogen peroxide. The COD removal ranged from 17% to 79%, depending on the reagent dose, and the stoichiometric reaction coefficient varied from 0.08 to 0.43 g COD (g H 2 O 2 ) −1 (which implies an efficiency in the use of hydrogen peroxide varying from 17% to 92%). In a study of the process kinetics, based on the initial rates method, the COD elimination rate was maximum when the molar ratio [

Treatment of textile effluent by chemical (Fenton's Reagent) and biological (sequencing batch reactor) oxidation

“…2b) and then remains practically constant. Such behaviour can be explained by the relevance of parallel reactions between the hydroxyl radical (or others) and the ferrous ion when this one is present in excess [3]: The results of the influence of the hydrogen peroxide concentration in the range 29.4-205.9 mM are plotted in Fig. 3.…”

“…It is a process with a low investment cost and easily applicable, since the generation of hydroxyl radicals is achieved by the decomposition of hydrogen peroxide catalyzed by ferrous ions, in acid conditions, under mild conditions of temperature and pressure [3][4][5][6]:…”

The decolorization and mineralization of Acid Orange 6 azo dye in aqueous solution by advanced oxidation processes: A comparative study

“…7a and b 2+ ), suggesting that HF = 6.58 might serve as the optimum molar ratio in treating AO6 solution. Some studies related to the optimum molar ratio for the Fenton system had been proposed in treating chlorinated aliphatic organic pollutants [21] and cork-processing wastewater [22] which were 5-11 and 10, respectively. As expected, the applied H 2 O 2 dosage was the controlling factor of AO6 decolorization and TOC removal, which were consumed in the early stage of the reaction.…”

Fenton advanced oxidation of emerging pollutants: parabens

“…These processes are highly efficient, their high cost being theri most important disadvantage. On the contrary, Fenton process is a promising technology [19,20]. The main advantages of this procedure are technological simplicity, excellent results in pollutant removal, inexpensiveness and safety [21,22].…”