Abstract This review provides updated information on the application of Fenton process as an advanced oxidation method for treatment industrial wastewaters. technology has been used in recent decades a chemical addressed to meet variety objectives including final polishing, reduction high percentages organic load terms oxygen demand or total carbon and removal recalcitrant toxic pollutants thus allowing further conventional biological treatment. The efficiency flexibility this proven with...

Phenol oxidation by Fenton's reagent (H2O2 + Fe2+) in aqueous solution has been studied depth for the purpose of learning more about reactions involved and extent process, under various operating conditions. An initial phenol concentration 100 mg/L was used as representative a phenolic industrial wastewater. Working temperatures 25 50 °C were tested, pH set at 3. The H2O2 Fe2+ doses varied range 500−5000 1−100 mg/L, respectively, corresponding to 1−10 times stoichiometric ratio. A series...

The implementation of increasingly stringent regulations for wastewater discharge has enforced research efforts toward either the novel treatments or improvement those presently available. literature on use Fenton oxidation in treatment established this method as one most effective and suitable process abatement recalcitrant water pollutants. However, despite many advantages conventional process, there are issues relative to pH modulation, cost associated H2O2 catalyst consumption well...

This work aims at evaluating the role of nature, size, age, and natural organic matter (NOM) fouling realistic microplastics (MPs) on adsorption two persistent micropollutants (diclofenac (DCF) metronidazole (MNZ)). For such goal, four representative polymer types (polystyrene (PS), polyethylene terephthalate (PET), polypropylene (PP) high-density (HDPE)) were tested. MPs obtained by cryogenic milling different commercial materials (disposable bottles, containers, trays), fully characterized...

This work aims at evaluating the fate of microplastics (MPs) along Fenton oxidation. For such goal, realistic MPs (150-250 μm) five representative polymer types (PET, PE, PVC, PP and EPS) were obtained from commercial plastic products by cryogenic milling. Experiments (7.5 h) performed under relatively severe operating conditions: T = 80 °C; pH0 3; [H2O2]0 1000 mgL-1 (15 doses, 1 every 0.5 h); [Fe3+]0 10 (5 1.5 h). Slight weight losses (∼10%) achieved after oxidation regardless MP nature....

The effect of temperature on the Fenton process has been studied within range 25−130 °C using phenol (100 mg/L) as target compound, 10 mg/L Fe2+, and a dose H2O2 corresponding to theoretical stoichiometric amount (500 for mineralization. TOC reduction was considerably improved increased. Whereas at 25 decreased less than 28%, almost 80% achieved 90 °C. Beyond this no significant improvement mineralization observed, although rate enhanced. Increasing leads more efficient consumption which...

A kinetic model for formic acid (FA) decomposition over a commercial 10 wt% Pd/AC catalyst has been developed to describe the hydrogen production and understand deactivation mechanism. The data were obtained in batch slurry reactor absence of mass transfer limitation at: CFA,0 = 0.25–2 M, CCAT 1 g L−1, T 25–85 ºC P atm. stability was studied successive cycles at different temperatures. Fresh, used regenerated catalysts deeply characterized gain insight into activity, selectivity stability....

Wastewater treatment plants (WWTPs) have been identified as hotspots for the spread of micro(nano)plastics (MPs/NPs) in water. Advanced oxidation processes (AOPs) emerged promising alternatives tackling MPs/NPs pollution, however, number studies on this topic remains quite limited and needs further research. In study, feasibility photo-Fenton process (UV/ H2O2/ Fe3+) carried out at ambient conditions using a broad-spectrum UV-Vis lamp was investigated degradation polystyrene (PS) NPs The...

The viscosity of diluted guar gum solutions and the xanthan mixture have been studied. Guar showed pseudoplastic behaviour. Apparent increased with concentration decreased temperature at which was measured. A maximum in plot versus increasing dissolution observed 60 °C. This behaviour related to differences molecular structure polymers solved different temperatures. Mixtures a higher combined than that occurring each separate gum. synergistic interaction affected by ratio both gums. effect...

This work reports on the evolution of toxicity phenol-containing simulated wastewater upon catalytic wet oxidation with a commercial copper-based catalyst (Engelhard Cu-0203T). The results study show that this enhances detoxification, in addition to its effect rate. EC50 values intermediates identified throughout route phenol have been determined and used predict oxidation. predicted compared ones measured directly from aqueous solution during process. To learn about routes oxidation,...

This work deals with the evolution of intermediates and ecotoxicity upon Fenton's oxidation phenol in aqueous solution. The EC50 values identified pathway have been measured. Some these compounds, mainly hydroquinone p-benzoquinone, showed toxicity levels much higher than itself. Depending on operating conditions, could be completely transformed into organic acids, oxalic formic. Ecotoxicity substantially lower those expected from chemical composition were measured reaction samples. is...

The hydrodechlorination of 4-chlorophenol in an aqueous phase was studied a semicontinuous basket stirred tank reactor using Pd, Pt, and Rh on γ-alumina commercial catalysts (0.5% w/w) under mild reaction conditions. catalytic activity the temperature range 20−40 °C. Pd showed higher than Pt. From consumption evolution products, phenol, cyclohexanone, cyclohexanol, scheme based parallel-series pathway kinetic model pseudo-first-order dependence have been proposed. Hydrodechlorination to...