Decolorization and degradation of 2,4‐dinitrophenol by fenton's reagent

Abstract

The Fenton's reagent was applied to decolor and degrade 2,4-dinitrophenol (DNP). Different concentrations of ferrous ion (Fe 2+ ) and hydrogen peroxide (H 2 O 2 ) were dosed to investigate their influences on the removal of DNP. The ADMI color value was adopted as an index to indicate the decoloring performance of the reaction. Low molecular weight of organic acids was monitored, and the role of dissolved oxygen during the DNP degradation was discussed.Results show that due to productions of colored intermediates and the oxalic acid, DNP was quickly removed, followed by the ADMI color value and DOC, respectively. Both initial removal rates of DNP and ADMI color value increased 935

The role of iron on the degradation and mineralization of organic compounds using conventional Fenton and photo-Fenton processes

“…These values have been reported optimal for the treatment of aromatics by Fenton and photo-Fenton processes [11][12][13]16,17,26]. Furthermore, these values of pH and temperature have been widely applied as optimal for the Fenton or photo-Fenton treatment of different substances and wastewaters [11][12][13][14][16][17][18][19][20]22,23,[26][27][28][29]. In order to perform proper comparisons, the same conditions of initial COD and reagents concentrations have been applied in all the treatments.…”

“…Fenton process has been reported to be successful when applied to the treatment of several organic chemicals [10][11][12][13][14][15][16][17][18][19], mainly among the aromatics, and wastewaters like textile dye industry effluent [20], pulp industry effluent [21] and landfill leachate [7,22]. Despite its highly oxidative efficiency and environmental friendly nature, the application of Fenton's reagent to wastewater treatment is limited by the final production of ferric iron sludge, which may add additional waste disposal cost.…”

A statistical experiment design approach for advanced oxidation of Direct Red azo-dye by photo-Fenton treatment

“…Photochemical oxidation methods such as the photo-Fenton have been given considerable attention in recent years for the treatment of recalcitrant wastewaters. Fenton reagent was reported to be effective for degradation of the refractory organic contaminants such as chlorophenols [9,10], chlorobenzene [11], nitrophenols [12] and dye pollutants [13,14]. Fenton reagent can completely decolorize and partially mineralize the textile dyes rather rapidly [15,16].…”

Degradation pathways of crystal violet by Fenton and Fenton-like systems: Condition optimization and intermediate separation and identification

“…Since, both ferrous and ferric ions are coagulants, the Fenton process can therefore perform the dual functions of oxidation and coagulation in the treatment process. In the past few decades, the Fenton process has been used to treat recalcitrant/toxic wastewaters [2][3][4] and decolorize dyes [5][6][7]. The Fenton reaction has proven effective at treating organic pollutants in wastewater, and the mechanism and kinetics have been studied by many researchers [8][9][10][11][12][13][14][15].…”