Kinetic modeling of aqueous phenol degradation by UV/H<sub>2</sub>O<sub>2</sub> process

Edalatmanesh, Maryam; Dhib, Ramdhane; Mehrvar, Mehrab

doi:10.1002/kin.20286

Cited by 32 publications

(25 citation statements)

References 29 publications

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“…However, the steady-state concentration of OH is often quite low (e.g., 10 -10 to 10 -12 mol$L -1 ). The corresponding pseudo-first-order rate constants are in the range of 1-10 -4 s -1 [6][7][8][11][12][13][14][15][16]43]. The observed rate constants in the combined MW/H 2 O 2 oxidation process are in good agreement with these values.…”

Section: Comparison To Other Apparent Synergistic Systemssupporting

confidence: 73%

“…A variety of advanced oxidation processes (AOPs) have been applied to remove phenolic compounds from wastewaters. AOPs, such as hydrogen peroxide (H 2 O 2 ) [2], Fenton's reagent [3,4], ultrasound/hydrogen peroxide (US/H 2 O 2 ) [5], ultraviolet/hydrogen peroxide (UV/H 2 O 2 ) [6,7], ozone/hydrogen peroxide (O 3 /H 2 O 2 ) [8][9][10], ultrasound/ozone (US/O 3 ) [11][12][13][14], photocatalytic oxidation [15], and electrochemical oxidation [16,17], can accelerate the nonselective oxidation by the in situ generation of hydroxyl radical ( $ OH) and other reactive oxygen intermediates. Hydrogen peroxide and ozone have been shown previously to be effective for the removal of phenol from wastewater [1,[3][4][5][6][7][8]10,11,17], while others have shown that microwave (MW) irradiation enhances the performance of conventional AOPs [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of microwave-enhanced oxidation of phenol by hydrogen peroxide

Zhao

Cheng

Hoffmann

2010

Front. Environ. Sci. Eng. China

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Aqueous solutions of phenol were oxidized by hydrogen peroxide assisted by microwave (MW) irradiation. A simple kinetic model for the overall degradation of phenol in the presence of excess H 2 O 2 is proposed in which the degradation rate of phenol is expressed as a linear function of the concentrations of phenol and H 2 O 2 . A detailed parametric study showed that the degradation rate of phenol increased with increasing [H 2 O 2 ] until saturation was observed. Phenol degradation followed apparent zero-order kinetics under MW radiation or H 2 O 2 oxidation. However, after 90 min of irradiation, the observed kinetics shifted to pseudo first order. The overall reaction rates were significantly enhanced in the combined MW/H 2 O 2 system, mainly because microwave could accelerate H 2 O 2 to generate hydroxyl radical ( $ OH) and other reactive oxygen intermediates. The observed synergetic effects of the MW/H 2 O 2 process resulted in an increased in the net reaction rate by a factor of 5.75. When hydrogen peroxide is present in a large stoichiometric excess, the time required to achieve complete mineralization is reduced significantly.

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Section: Comparison To Other Apparent Synergistic Systemssupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Kinetics of microwave-enhanced oxidation of phenol by hydrogen peroxide

Zhao

Cheng

Hoffmann

2010

Front. Environ. Sci. Eng. China

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“…Table 3 shows the agreement between the proposed model with the experimental data as indicated by low values of AARD, which are between 2.48% and 3.87%. Similar to that obtained from the study on the effect of H 2 O 2 , the value of k 10 , k 11 and k 12 obtained from the pH study are also consistent with the constants reported by several workers with other modes of generation of hydroxyl radicals [27,42,43]. In addition, Table 3 also discloses the fact that starch oxidation using H 2 O 2 under influence of UV irradiation within the studied range pH is controlled by mass transfer resistance.…”

Section: Effect Of Phsupporting

confidence: 89%

“…3, 4 11 and k 12 obtained in this work are consistent with the constants reported by several workers with other modes of generation of hydroxyl radicals. The value of reaction rate constant between 1,2-dibromo-3-chloropropane and hydroxyl radicals was 1.47 × 10 8 (1/M.s) [27], while rate constants of phenol degradation to catechol and resorcinol by UV/H 2 O 2 process were 9 × 10 8 and 2 × 10 8 (1/M.s), respectively [42]. Considering the typical rate constants of organic compounds with hydroxyl radicals vary from 10 6 to 10 10 (1/M.s) [43], corn starch can be considered as fast reacting compounds with hydroxyl radicals.…”

Section: 1 Effect Of Initial Hydrogen Peroxide Concentrationmentioning

confidence: 96%

Reaction and Mass Transfer Kinetics Model of Hydrogen Peroxide Oxidation of Starch under Influence of Ultraviolet Irradiation

Kumoro

Ratnawati

Retnowati

2017

Period. Polytech. Chem. Eng.

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“…The power requirements for aerobic process mainly come from the air blower. This power figure can be determined using the formula below [53]:…”

Section: Aerobic Treatmentmentioning

confidence: 99%

A Critical Review on Processes and Energy Profile of the Australian Meat Processing Industry

et al. 2017

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This review article addresses wastewater treatment methods in the red meat processing industry. The focus is on conventional chemicals currently in use for abattoir wastewater treatment and energy related aspects. In addition, this article discusses the use of cleaning and sanitizing agents at the meat processing facilities and their effect on decision making in regard to selecting the treatment methods. This study shows that cleaning chemicals are currently used at a concentration of 2% to 3% which will further be diluted with the bulk wastewater. For example, for an abattoir that produces 3500 m 3 /day wastewater and uses around 200 L (3%) acid and alkaline chemicals, the final concentration of these chemical will be around 0.00017%. For this reason, the effects of these chemicals on the treatment method and the environment are very limited. Chemical treatment is highly efficient in removing soluble and colloidal particles from the red meat processing industry wastewater. Actually, it is shown that, if chemical treatment has been applied, then biological treatment can only be included for the treatment of the solid waste by-product and/or for production of bioenergy. Chemical treatment is recommended in all cases and especially when the wastewater is required to be reused or released to water streams. This study also shows that energy consumption for chemical treatment units is insignificant while efficient compared to other physical or biological units. A combination of a main (ferric chloride) and an aid coagulant has shown to be efficient and cost-effective in treating abattoir wastewater. The cost of using this combination per cubic meter wastewater treated is 0.055 USD/m 3 compared to 0.11 USD/m 3 for alum and the amount of sludge produced is 77% less than that produced by alum. In addition, the residues of these chemicals in the wastewater and the sludge have a positive or no impact on biological processes. Energy consumption from a small wastewater treatment plant (WWTP) installed to recycle wastewater for a meet facility can be around $500,000.

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Kinetic modeling of aqueous phenol degradation by UV/H₂O₂ process

Cited by 32 publications

References 29 publications

Kinetics of microwave-enhanced oxidation of phenol by hydrogen peroxide

Kinetics of microwave-enhanced oxidation of phenol by hydrogen peroxide

Reaction and Mass Transfer Kinetics Model of Hydrogen Peroxide Oxidation of Starch under Influence of Ultraviolet Irradiation

A Critical Review on Processes and Energy Profile of the Australian Meat Processing Industry

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Kinetic modeling of aqueous phenol degradation by UV/H2O2 process

Cited by 32 publications

References 29 publications

Kinetics of microwave-enhanced oxidation of phenol by hydrogen peroxide

Kinetics of microwave-enhanced oxidation of phenol by hydrogen peroxide

Reaction and Mass Transfer Kinetics Model of Hydrogen Peroxide Oxidation of Starch under Influence of Ultraviolet Irradiation

A Critical Review on Processes and Energy Profile of the Australian Meat Processing Industry

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Kinetic modeling of aqueous phenol degradation by UV/H₂O₂ process