Wet peroxidation of resorcinol catalyzed by copper impregnated granular activated carbon

Gosu, Vijayalakshmi; Dhakar, Archana; Sikarwar, Prerana; Kumar, U. K. Arun; Subbaramaiah, Verraboina; Zhang, Tian C.

doi:10.1016/j.jenvman.2018.06.093

Cited by 23 publications

(11 citation statements)

References 37 publications

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“…Considering the fact that the HQ degrades during the catalytic oxidation process whereas it only gets separated from the solution and gets adsorbs on the Fe-GAC during the adsorption process which will require further disposal of the spent Fe-GAC, overall catalytic oxidation seems to be a better technique for treatment of HQ bearing wastewater. Comparison of work reported on HQ adsorption or mineralization by various adsorbents/catalysts is given in Table S3 [47,[69][70][71][72][73][74][75]. Again, mineralization of HQ by Fe-GAC is the better method of HQ removal from aqueous solution.…”

Section: Comparison Of Adsorption and Catalytic Oxidation Processmentioning

confidence: 99%

Removal of toxic hydroquinone: Comparative studies on use of iron impregnated granular activated carbon as an adsorbent and catalyst

Tyagi

Das

Srivastava

2018

Environmental Engineering Research

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In this study, iron (Fe) impregnated granular activated carbon (Fe-GAC) has been synthesized and characterized for various properties. Comparative studies have been performed for use of Fe-GAC as an adsorbent as well as a catalyst during catalytic oxidation of hydroquinone (HQ). In the batch adsorption study, effect of process parameter like initial HQ concentration (Co = 25-1,000 mg/L), pH (2-10), contact time (t: 0-24 h), temperature (T: 15-45°C) and adsorbent dose (w: 5-50 g/L) have been studied. Maximum HQ adsorption efficiency of 75% was obtained at optimum parametric condition of: pH = 4, w = 40 g/L and t = 14 h. Pseudo-second order model best-fitted the HQ adsorption kinetics whereas Langmuir model best-represented the isothermal equilibrium behavior. During oxidation studies, effect of various process parameters like initial HQ concentration (Co: 20-100 mg/L), pH (4-8), oxidant dose (CH2O2: 0.4-1.6 mL/L) and catalyst dose (m: 0.5-1.5 g/L) have been optimized using Taguchi experimental design matrix. Maximum HQ removal efficiency of 83.56% was obtained at optimum condition of Co = 100 mg/L, pH = 6, CH2O2 = 0.4 mL/L, and m = 1 g/L. Overall use of Fe-GAC during catalytic oxidation seems to be a better as compared to its use an adsorbent for treatment of HQ bearing wastewater.

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Section: Comparison Of Adsorption and Catalytic Oxidation Processmentioning

confidence: 99%

Removal of toxic hydroquinone: Comparative studies on use of iron impregnated granular activated carbon as an adsorbent and catalyst

Tyagi

Das

Srivastava

2018

Environmental Engineering Research

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“…Among them, catalytic wet oxidation (CWAO) has been widely researched due to the use of catalysts that allow performing the process in milder conditions while improving the process efficiency. 10,11 The heterogeneous catalysts currently used for the CWAO of phenol and its derivatives are Fe, 12,13 Cu, 14,15 Mn, 16 transition metals, their oxides, 17 and other active components supported on Al 2 O 3 , 13,18 CeO 2 , 19 ZrO 2 , 20 TiO 2 , 21 activated carbon, 22 molecular sieves, 23,24 ion-exchange resins, 25 etc. The loading of these catalytic active species on the exemplified supports ensured an improved catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

“…These studies all acknowledged that the relatively high specific surface area, high Cu content, and high dispersion of the active copper sites were the promoters of the high phenol conversion in the CWAO over Cu-based catalysts. 14,22,28 Activated carbon has been widely used in CWAO due to its particular characteristics, such as a large specific surface area, a porous structure, variable surface functional groups, and excellent adsorption performance. 29 However, the amount of active components loaded on the support is affected by the adsorption capacity of activated carbon.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Cu-Loaded Biomass-Derived Activated Carbon Catalysts for Catalytic Wet Air Oxidation of Phenol

Zhang

et al. 2020

Ind. Eng. Chem. Res.

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A series of Cu-loaded biomass-derived activated carbon (Cu/AC) catalysts with various impregnation ratios were prepared by precursor impregnation (PI) and activated carbon impregnation (ACI) methods. N 2 adsorption−desorption, inductively coupled plasma, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, etc., were used to investigate their physicochemical properties. The performance of catalytic wet air oxidation (CWAO) of phenol using O 2 as the oxidant was evaluated. The results demonstrated that the catalysts prepared by the PI method have higher specific surface area and Cu content. In the catalysts, Cu species coexisted with Cu 2+ and (Cu + + Cu 0 ). The content of (Cu + + Cu 0 ) in PI catalysts was higher, which was favorable for the formation of free radicals (O 2 − • and HO•), and then improved the conversions of phenol and chemical oxygen demand. The PI catalyst prepared with an impregnation ratio of 3 exhibited the best catalytic activity for phenol oxidation. Meanwhile, the loss of Cu species was the main cause of catalyst deactivation.

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“…Later, Haber and Weiss [27] discovered that the hydroxyl radical was the responsible for the degradation of the organic compounds. So, CWPO is based on the catalytic hydrogen peroxide decomposition by transition metallic cations (M) that generates hydroxyl radicals (see Equation 5) in mild reaction conditions [27,[50][51][52][53]. In this process, the catalyst is oxidized in the reaction with H 2 O 2 , generating HO • (Equation (5)), being regenerated (reduced) with additional H 2 O 2 molecules and even with the generated hydroperoxyl radicals (HO 2…”

Section: Catalytic Wet Peroxidationmentioning

confidence: 99%

“…The wastewater treatment by CWPO has been extensively studied for decades, mostly using supported iron as a catalyst [29,52,[58][59][60][61] (in this case, the process being called Fenton or Fenton-like). Recent studies report on catalysts where iron has been replaced by other metals, such as nickel, cobalt, copper, cerium, and manganese, as well as bimetallic particles [47,51,[62][63][64][65]. However, quite often, such materials are not stable, leaching the metal to the effluent, making their reuse not possible, and their industrial application unfeasible.…”

Section: Catalytic Wet Peroxidationmentioning

confidence: 99%

Wastewater Treatment by Catalytic Wet Peroxidation Using Nano Gold-Based Catalysts: A Review

et al. 2019

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Nowadays, there is an increasing interest in the development of promising, efficient, and environmentally friendly wastewater treatment technologies. Among them are the advanced oxidation processes (AOPs), in particular, catalytic wet peroxidation (CWPO), assisted or not by radiation. One of the challenges for the industrial application of this process is the development of stable and efficient catalysts, without leaching of the metal to the aqueous phase during the treatment. Gold catalysts, in particular, have attracted much attention from researchers because they show these characteristics. Recently, numerous studies have been reported in the literature regarding the preparation of gold catalysts supported on various supports and testing their catalytic performance in the treatment of real wastewaters or model pollutants by CWPO. This review summarizes this research; the properties of such catalysts and their expected effects on the overall efficiency of the CWPO process, together with a description of the effect of operational variables (such as pH, temperature, oxidant concentration, catalyst, and gold content). In addition, an overview is given of the main technical issues of this process aiming at its industrial application, namely the possibility of using the catalyst in continuous flow reactors. Such considerations will provide useful information for a faster and more effective analysis and optimization of the CWPO process.

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Wet peroxidation of resorcinol catalyzed by copper impregnated granular activated carbon

Cited by 23 publications

References 37 publications

Removal of toxic hydroquinone: Comparative studies on use of iron impregnated granular activated carbon as an adsorbent and catalyst

Removal of toxic hydroquinone: Comparative studies on use of iron impregnated granular activated carbon as an adsorbent and catalyst

Preparation of Cu-Loaded Biomass-Derived Activated Carbon Catalysts for Catalytic Wet Air Oxidation of Phenol

Wastewater Treatment by Catalytic Wet Peroxidation Using Nano Gold-Based Catalysts: A Review

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