Kinetic and thermodynamic study of oxidative degradation of acid yellow 17 dye by Fenton-like process: Effect of HCO3−, CO32−, Cl− and SO42− on dye degradation

Abstract

We report here the degradation of AY-17 dye using Fenton-like process (H2O2/Fe 3+ ). The maximum degradation (83%) of AY17 dye is achieved at pH 3 in 60 min, with optimum concentrations of AY 17 (0.06 mM), H2O2 (0.9 mM), and Fe 2+ (0.06 mM). The scavenging effects of HCO3 − , CO3 2− , Cl − and SO4 2− on dye degradation are also examined. The activation energy (Ea), activation enthalpy (H * ), and activation entropy (S * ) are calculated for the dye degradation using pseudo-first-order kinetics at various temperature.

Effect of doping parameters on photocatalytic degradation of methylene blue using Ag doped ZnO nanocatalyst

“…The thermodynamic study of photocatalytic degradation of MB was performed by performing the reaction at different temperatures in the range 298.15-318.15 K using 20 mg/L initial dye concentration and 1 g/L catalyst loading. Average value of rate constant k was determined considering pseudo first order behavior of the photocatalytic degradation reaction [22,23]. The plot of k vs temperature was plotted Fig.…”

Optimization of triple dye mixture removal by oxidation with Fenton

“…In other words, the presence of salt had a negative effect on COD removal in the Fenton process. The presence of CI − reduces the yield by causing the hydroxyl radical to be swept and forms stable complexes with Fe +2 / Fe +3 , which assume a reducing role in the environment (Khan et al 2019). The use of Fe +2 /Fe +3 with the exception of hydroxyl radical formation is not desirable in the Fenton process, since reaction of Fe +2 with H 2 O 2 (hydroxyl radical formation) is reduced.…”

“…Discharge of wastewater produced by the use of dyes from hazardous substances into the water system affects photosynthetic and respiratory activities adversely and causes the degradation of the water ecosystem, deterioration of aesthetic appearance and the formation of toxic products by reductive cleavage of azo bond. These dyes cause also mutagenic and carcinogenic effects in humans (Khan et al 2019). There are various synthetic dyes (cationic, anionic and non-ionic).…”

“…Basic dyes are widely used in silk, wool, nylon and acrylic dyeing (Bayrak Tezcan et al 2019). These dyes should be controlled before they are released to the environment since even small amounts of these dyes can cause negative effects on the environment (Khan et al 2019). Azo dyes are often used in the textile industry and other industrial applications due to their Editorial responsibility: M. Abbaspour.…”

Combined Wastewater Treatment from Manganese Phosphate Coating: Coagulation-Ozonation-Fenton Reaction-Sorption

“…The methods of industrial wastewater treatment include precipitation techniques with the use of calcium compounds [7,8], coagulation methods with the use of aluminum and iron compounds [9,10], treatment with the use of membrane methods [11], adsorption processes using zeolites or biomass [12], processes using nanofiltration or reverse osmosis [13,14], electrodialysis [15][16][17], photocatalytic methods [18], ultrafiltration [19], purification with the use of activated carbon [20][21][22] as well as techniques of advanced oxidation with the use of ozone, hydrogen peroxide, UV radiation and Fenton's reagents [23,24]. Beside chemical methods, we should also list physical methods in wastewater treatment, such as sedimentation [25] or processes related to the equalization of wastewater flow, which mainly consist of buffering by introducing equalizing devices or such retaining the flowing wastewater [26].…”