Catalytic wet peroxide oxidation of p-nitrophenol by Fe (III) supported on resin

2010 ◽  
Vol 62 (8) ◽  
pp. 1879-1887 ◽  
Author(s):  
Rey-May Liou ◽  
Shih-Hsiung Chen ◽  
Cheng-Hsien Huang ◽  
Cheng-Lee Lai ◽  
C. Y. Shih ◽  
...  
Keyword(s):  
Cod Removal ◽  
Acidic Environment ◽  
Leaching Test ◽  
Peroxide Oxidation ◽  
Effective Catalyst ◽  
Wet Peroxide Oxidation ◽  
Oxidant Concentration ◽  
Aging Test ◽  
Initial Ph ◽  
Catalytic Wet Peroxide Oxidation

FeIII supported on resin (FeIII-resin) as an effective catalyst for peroxide oxidation was prepared and applied for the degradation of p-nitrophenol (PNP). Catalytic wet peroxide oxidation (CWPO) experiments with hydrogen peroxide as oxidant were performed in a batch rector with p-nitrophenol as the model pollutant. Under given conditions (PNP concentration 500 mg/L, H2O2 0.1 M, 80°C, resin dosage 0.6% g/mL), p-nitrophenol was almost completely removed, corresponding to an 84% of COD removal. It was found that the reaction temperature, oxidant concentration. and initial pH of solution significantly affected both p-nitrophenol conversion and COD removal by oxidation. It can be inferred from the experiments that FeIII supported on resin was an effective catalyst in the mineralization of p-nitrophenol. In an acidic environment of oxidation, the leaching test showed that there was only a slight leaching effect on the activity of catalytic oxidation. It was also confirmed by the aging test of catalysts in the oxidation.

Catalytic Wet Peroxide Oxidation of Dye Wastewater Using Fe2O3-CeO2/γ-Al2O3 as Catalyst

2014 ◽  
Vol 884-885 ◽  
pp. 29-32
Author(s):  
Hong Ya Li ◽  
Biao Yan ◽  
Bin Xia Zhao ◽  
Xiao Li Zhang
Keyword(s):  
Ph Value ◽  
Removal Rate ◽  
Cod Removal ◽  
Dye Wastewater ◽  
Peroxide Oxidation ◽  
Oxidation Method ◽  
Wet Peroxide Oxidation ◽  
Initial Ph ◽  
Catalytic Wet Peroxide Oxidation ◽  
Cod Removal Rate

Fe2O3-CeO2/γ-Al2O3 was used as catalyst for treating the dye wastewater by catalytic wet peroxide oxidation method, the effect of reaction temperature, initial pH value of the wastewater, dosage of catalyst and hydrogen peroxide on the COD removal were studied. Results showed that 90.3% of COD removal rate can be obtained under the condition of 90°C, pH=7, 0.8g catalyst/100 mL wasterwater, and 6mL H2O2 /100 mL wasterwater.

Phenol Degradation by UV-Enhanced Catalytic Wet Peroxide Oxidation Process

2014 ◽  
Vol 17 (1) ◽  
Author(s):  
Peng Liu ◽  
Chaolin Li ◽  
Qi Han ◽  
Gang Lu ◽  
Xiaoqing Dong ◽  
...  
Keyword(s):  
Oxidation Process ◽  
Phenol Degradation ◽  
Cod Removal ◽  
Peroxide Oxidation ◽  
Homogeneous Catalysts ◽  
Phenol Solution ◽  
Wet Peroxide Oxidation ◽  
Catalytic Wet Peroxide Oxidation

AbstractIn this study, degradation of phenol solution by the ultraviolet-enhanced catalytic wet peroxide oxidation process (UV-CWPO) were evaluated via COD removal. Six kinds of homogeneous catalysts (Fe

Iron catalyst supported on modified kaolin for catalytic wet peroxide oxidation

Clay Minerals ◽  
2019 ◽  
Vol 54 (1) ◽  
pp. 67-73 ◽  
Author(s):  
Ali Boukhemkhem ◽  
Kamel Rida ◽  
Alejandro H. Pizarro ◽  
Carmen B. Molina ◽  
Juan J. Rodriguez
Keyword(s):  
Iron Catalyst ◽  
Batch Reactor ◽  
Textural Properties ◽  
Catalytic Efficiency ◽  
Peroxide Oxidation ◽  
Temperature Range ◽  
Catalytic Support ◽  
Wet Peroxide Oxidation ◽  
Initial Ph ◽  
Catalytic Wet Peroxide Oxidation

AbstractAn iron catalyst supported on the modified Tamazert kaolin has been prepared and tested in catalytic wet peroxide oxidation using phenol and 4-chlorophenol (4-CP) as target compounds (100 mg/L initial concentration). Kaolin is not usually employed as a catalytic support due to its low developed porous structure, but its textural properties may be improved upon calcination and acid and basic treatment. The catalyst was characterized by N2 adsorption–desorption and chemical analysis by total-reflection X-ray fluorescence spectroscopy. The catalytic tests were carried out in a batch reactor with a stoichiometric amount of H2O2. The catalytic efficiency was studied within the temperature range of 25–55°C at an initial pH of 3.3 and 1 g/L catalyst. Complete phenol and 4-CP removal was achieved with no significant differences in phenol and 4-CP conversions within the temperature range tested. Meanwhile, total organic carbon (TOC) reduction was greatly favoured by increasing the temperature, which may be partially attributed to a probable contribution of a homogeneous reaction associated with iron leaching. However, this effect might be of limited significance because the highest concentrations of iron in the liquid phase were below 4.5 and 8.5 mg/L in the experiments with phenol and 4-CP, respectively. At 55°C, TOC was reduced by ~70% after 4 h reaction time, with the remaining by-products corresponding almost completely to low-molecular-weight carboxylic acids of very low ecotoxicity.

scholarly journals Microwave-enhanced catalytic wet peroxide oxidation of quinoline: the influence of pH and H2O2dosage and identification of reactive oxygen species

RSC Advances ◽  
2017 ◽  
Vol 7 (24) ◽  
pp. 14769-14775 ◽  
Author(s):  
Bo Zhang ◽  
Hong You ◽  
Fei Wang
Keyword(s):  
Reactive Oxygen Species ◽  
Reactive Oxygen ◽  
Ni Catalyst ◽  
Oxygen Species ◽  
Peroxide Oxidation ◽  
Radical Scavengers ◽  
Wet Peroxide Oxidation ◽  
Initial Ph ◽  
Catalytic Wet Peroxide Oxidation ◽  
Influence Of Ph

This article presents a study about the initial pH and H2O2dosage influence on TOC abatement by MW-CWPO with Cu/Ni-catalyst and reactive oxygen identification based on quinoline mineralization inhibition using the specific radical scavengers.

scholarly journals Catalytic wet peroxide oxidation degradation of magenta wastewater and preparation of FeOCl/montmorillonite

2021 ◽  
Author(s):  
Tiancheng Hun ◽  
Binxia Zhao ◽  
Tingting Zhu ◽  
Linxue Liu ◽  
Zhiliang Li ◽  
...  
Keyword(s):  
Removal Rate ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Impregnation Method ◽  
Dye Wastewater ◽  
Peroxide Oxidation ◽  
Melting Method ◽  
Wet Peroxide Oxidation ◽  
Catalytic Wet Peroxide Oxidation ◽  
Cod Removal Rate

Abstract The iron oxychloride/pillared montmorillonite (FeOCl/MMT) catalyst was prepared by wet impregnation method and solid melting method. Various characterization techniques were used to analyze the microscopic morphology and structure of a series of catalysts. Moreover, the catalysts were used to treat magenta simulated dye wastewater through catalytic wet peroxide oxidation (CWPO) degradation. The magenta removal rate and chemical oxygen demand (COD) removal rate of the magenta simulated dye wastewater were used to evaluate the catalytic performance of the catalyst, and the optimal catalyst preparation conditions were selected. The results showed that the solid melting method was more favorable to the preparation of the catalyst, and the COD removal rate of wastewater can reach 70.8% when the FeOCl load was 3%. Moreover, 96.2% of the magenta in the solution has been removed. The COD removal rate of the magenta wastewater decreased by only 12.4% after the catalyst was repeatedly used six times, indicating that the catalyst has good activity and stability. The Fermi equation can simulate the reaction process of the catalyst treating magenta wastewater at high temperature.

scholarly journals Mineralization of quinoline in aqueous solution by microwave-assisted catalytic wet peroxide oxidation system: process optimization, products analysis and degradation route research

2018 ◽  
Vol 78 (6) ◽  
pp. 1324-1335
Author(s):  
Zhipeng Li ◽  
Feng Liu ◽  
Bo Zhang ◽  
Yi Ding ◽  
Hong You ◽  
...  
Keyword(s):  
Microwave Power ◽  
Ph Value ◽  
Gas Chromatography Mass Spectrometry ◽  
Peroxide Oxidation ◽  
Wet Peroxide Oxidation ◽  
Detection And Identification ◽  
Initial Ph ◽  
Products Analysis ◽  
Catalytic Wet Peroxide Oxidation ◽  
Predicted Values

Abstract The experimental design methodology was used to optimize the experimental parameters of quinoline mineralization by microwave-enhanced catalytic wet peroxide oxidation (CWPO). Initial pH value, temperature, H2O2 dosage, and microwave power were selected as independent variables. The mineralization efficiency approached 83.82% under the optimized conditions: initial pH 6.00, temperature 60 °C, H2O2 dosage 0.09 mol/L, and microwave power 565.10 W. Regression analysis with an R2 value of 0.9867 showed a good agreement between the experimental results and the predicted values. Furthermore, based on the detection and identification of products by gas chromatography mass spectrometry, the oxidation degradation pathways of quinoline were proposed. The energy balance and costs analysis indicated that the total cost of the microwave-enhanced CWPO process for wastewater treatment was 40.60 yuan/m3.

Treatment of Phenol Wastewater by Catalytic Wet Peroxide Oxidation over Fe2O3/γ-Al2O3

2015 ◽  
Vol 1092-1093 ◽  
pp. 962-965
Author(s):  
Shu Xiang Lu ◽  
Ming Hui Lu ◽  
Lu Lu Gao ◽  
Dong Mei Mo
Keyword(s):  
Inductively Coupled Plasma ◽  
Phenol Degradation ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Peroxide Oxidation ◽  
X Ray Diffraction ◽  
Inductively Coupled ◽  
Wet Peroxide Oxidation ◽  
Initial Ph ◽  
Catalytic Wet Peroxide Oxidation

Fe2O3/γ-Al2O3 catalysts were prepared by the method of wet impregnation and were characterized by X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), N2 adsorption and Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES), respectively. The activity of Fe2O3/γ-Al2O3 for catalytic wet peroxide oxidation (CWPO) of phenol was tested. The effects of the initial pH of the phenolic aqueous solutions and the iron content of Fe2O3/γ-Al2O3 on phenol degradation have been studied. The results indicated that almost total removal of phenol and considerably high reduction of COD for the initial phenol concentration of 100-1000 mg/L were achieved under mild conditions. The leached iron from the catalyst was negligible.

scholarly journals Preparation of Al/Fe-PILC clay catalysts from concentrated precursors: enhanced hydrolysis of pillaring metals and intercalation

RSC Advances ◽  
2020 ◽  
Vol 10 (66) ◽  
pp. 40450-40460
Author(s):  
Carlos Andrés Vallejo ◽  
Luis Alejandro Galeano ◽  
Raquel Trujillano ◽  
Miguel Ángel Vicente ◽  
Antonio Gil
Keyword(s):  
Solvent Free ◽  
Peroxide Oxidation ◽  
Highly Active ◽  
Wet Peroxide Oxidation ◽  
Catalytic Wet Peroxide Oxidation ◽  
Hydrolysis Of ◽  
Clay Catalysts

Significantly intensified preparation of Al/Fe-hydrolysed-pillaring solutions and solvent-free intercalation of bentonites yielding Al/Fe-PILCs highly active in catalytic wet peroxide oxidation.

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