Enhanced degradation of chloramphenicol at alkaline conditions by S(-II) assisted heterogeneous Fenton-like reactions using pyrite

The decoloration of an azo dye reactive brilliant orange (X-GN) by a heterogeneous Fenton system using activated carbon–FeOOH catalyst (AC–FeOOH) and H2O2 was studied. Under typical conditions (pH 7.0, H2O2 10 mmol/L, AC–FeOOH 1.0 g/L and 30 °C), 98% decoloration rate of X-GN was achieved in 240 min. The decoloration efficiency of X-GN increased with higher H2O2 dosage, higher AC–FeOOH dosage and higher reaction temperature. Though the catalytic reaction was an acid driven process, a sufficient decoloration performance was still obtained in neutral and alkaline conditions. Kinetic studies suggested that the decoloration of X-GN followed a pseudo-first order reaction and the activation energy was 17.2 kJ/mol. Iron leaching from AC–FeOOH occurred during the reaction, but the decoloration efficiency of X-GN was still higher than 80% after four runs. The AC–FeOOH has a good stability and can be reused. Besides, the generation of massive iron-containing sludge can be avoided after reaction as the remaining ferric ions in the solution were less than 1 mg/L in this combined H2O2 and AC–FeOOH process.

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Enhanced degradation of tetrabromobisphenol A by magnetic Fe3O4@ZIF-67 composites as a heterogeneous Fenton-like catalyst

Chemical Engineering Journal ◽

10.1016/j.cej.2020.127539 ◽

2020 ◽

pp. 127539

Author(s):

Mantang Chen ◽

Nan Wang ◽

Xiaobo Wang ◽

Yu Zhou ◽

Lihua Zhu

Keyword(s):

Tetrabromobisphenol A ◽

Heterogeneous Fenton ◽

Magnetic Fe3o4 ◽

Enhanced Degradation

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Synthesis and characterization of saponin-modified Fe3 O4 nanoparticles as heterogeneous Fenton-catalyst with enhanced degradation of p-nitrophenol

Journal of Chemical Technology & Biotechnology ◽

10.1002/jctb.5139 ◽

2016 ◽

Vol 92 (6) ◽

pp. 1421-1427 ◽

Cited By ~ 9

Author(s):

Hejun Ren ◽

Yu Su ◽

Xiao Han ◽

Rui Zhou

Keyword(s):

Synthesis And Characterization ◽

Heterogeneous Fenton ◽

Fenton Catalyst ◽

Heterogeneous Fenton Catalyst ◽

Enhanced Degradation

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Effect of pH on Zero Valent Iron Performance in Heterogeneous Fenton and Fenton-Like Processes: A Review

Molecules ◽

10.3390/molecules23123127 ◽

2018 ◽

Vol 23 (12) ◽

pp. 3127 ◽

Cited By ~ 22

Author(s):

Fatemeh Rezaei ◽

Davide Vione

Keyword(s):

Wastewater Treatment ◽

Zero Valent Iron ◽

Heterogeneous Fenton ◽

Solution Ph ◽

Water And Wastewater Treatment ◽

Environmental Friendliness ◽

Effect Of Ph ◽

Solid Catalysts ◽

Alkaline Conditions ◽

Water And Wastewater

Heterogeneous Fenton processes with solid catalysts have gained much attention for water and wastewater treatment in recent years. In the field of solid catalysts, zero valent iron (ZVI) is among the most applicable due to its stability, activity, pollutant degradation properties and environmental friendliness. The main limitation in the use of ZVI in heterogeneous Fenton systems is due to its deactivation in neutral and alkaline conditions, and Fenton-like processes have been developed to overcome this difficulty. In this review, the effect of solution pH on the ZVI-Fenton performance is discussed. In addition, the pH trend of ZVI efficiency towards contaminants removal is also considered in oxic solutions (i.e., in the presence of dissolved O2 but without H2O2), as well as in magnetic-field assisted Fenton, sono-Fenton, photo-Fenton and microwave-Fenton processes at different pH values. The comparison of the effect of pH on ZVI performance, taking into account both heterogeneous Fenton and different Fenton-like processes, can guide future studies for developing ZVI applications in water and wastewater treatment.

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