The influence of TiO2 and aeration on the kinetics of electrochemical oxidation of phenol in packed bed reactor

Wang, Lizhang; Zhao, Yuemin; Fu, Jianfeng

doi:10.1016/j.jhazmat.2008.03.034

Cited by 52 publications

(17 citation statements)

References 32 publications

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“…It can be interpreted that alkaline solution conduces to forming carbonate and bicarbonate which are well-known scavengers for hydroxyl radical [28]. Moreover, the acidic solution easily controls the oxygen evolution so as to enhance the overall current efficiency for both direct and indirect oxidation of organic pollutants on the anodes [29].…”

Section: Effect Of Current Densitymentioning

confidence: 99%

Electrochemical pretreatment of heavy oil refinery wastewater using a three-dimensional electrode reactor

Ling-yong

Guo

Yan

et al. 2010

Electrochimica Acta

171

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Section: Effect Of Current Densitymentioning

confidence: 99%

Electrochemical pretreatment of heavy oil refinery wastewater using a three-dimensional electrode reactor

Ling-yong

Guo

Yan

et al. 2010

Electrochimica Acta

171

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“…TiO 2 (Degussa P25) suspension and wastewater were injected into the reactor by peristaltic pumps, according to the flow rate calculated from working volume and residence time. More details about the equipment and characteristics of AC used in the electrolysis are given in our previous work (Wang et al 2008).…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, the application of catalyst and compressed air also could increase the values of the rate constants (Kesselman et al 1997;. The mechanism for the electrochemical oxidation of phenol assisted with TiO 2 and air was proposed in our previous paper (Wang et al 2008), but an accurate fit between experimental data and kinetics was difficult to achive. In this study, the effect of catalyst on the rate constant was supposed as following:…”

Section: Reaction Kineticsmentioning

confidence: 97%

Determination of reaction rate constants for phenol oxidation using SnO2/Ti anodes coupled with activated carbon adsorption in the presence of TiO2 as catalyst

Zhao

Ding

Wang

et al. 2011

Water Science and Technology

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Series of experiments for phenol degradation with assistance of TiO2 catalyst at pH of 6.5 and temperature of 25 degrees C were conducted using a lab-scale electrochemical reactor constructed in our laboratory. According to the results, at the presence of the TiO2 catalyst the removal of phenol was increased and first-order kinetics could describe the evolution of phenol concentration. For inspecting the relationship between rate constants and dosage of TiO2, two possible kinetics were proposed in this study. Contrasted to the abundant experimental data, a reasonable kinetics was obtained for the estimation of phenol concentration effluent during continuous flow of raw wastewater, especially when the TiO2 dosage was less than 0.5g L(-1). The model obtained from these experiments could employed for the calculation of rate constants at different TiO2 dosage and the necessary dosage of catalyst when a discharge standard was designed.

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“…16 33 As known, 7 8 the adsorption of phenolic compounds on activated carbon implies the formation of electron donor-acceptor complexes in which the basic surface oxygen groups act as donors and the aromatic ring of the adsorbate act as an acceptor. Furthermore, as recently demonstrated, [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] there are basic sites on the surface of the carbons, probably located at electron-rich regions within the basal planes of carbon crystallites, away from the crystallite edges. These regions predominate in carbons with low oxygen content [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] and may give rise to the formation of the above electron donor-acceptor complexes with the aromatic ring of the phenolic compounds.…”

Section: Effect Of Initial Ph and Adsorption Isothermsmentioning

confidence: 99%

Immersion Calorimetry Applied to the Study of the Adsorption of Phenolic Derivatives onto Activated Carbon Obtained by Pyrolysis of Potato Peel

Moreno–Piraján¹,

Giraldo²

2012

Mat Express

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Activated carbons (ACs) were prepared by pyrolysis of potato peel in the presence of zinc chloride (chemical activation). Room-temperature adsorption of phenol, p-cresol, p-chlorophenol and p-nitrophenol from aqueous solutions at room temperature was investigated. Experimental results show that adsorption capacity depends on carbon surface area and porosity, on the solubility of the different phenolic compounds and on the hydrophobicity of the substituent. The relative affinity of the phenolic compounds towards the carbon surface was correlated to the electron donor-acceptor complexes which are formed between the basic sites on the carbon surface and the aromatic ring of the phenol compounds. As a result, the adsorption capacity began to decrease at a pH value that depended on the difference between the external and internal surface charge density, as measured by electrophoresis and the pH of the slurry, respectively. Eventually, immersion enthalpy was determined for each carbon sample. The values always increase with the relative amount adsorbed at equilibrium (Q e , ranging between 23.5 and 65.4 J/g. Activated carbons with lower total acidity contents show the lowest values, this being related to the different activation treatments carried out by zinc chloride.

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The influence of TiO2 and aeration on the kinetics of electrochemical oxidation of phenol in packed bed reactor

Cited by 52 publications

References 32 publications

Electrochemical pretreatment of heavy oil refinery wastewater using a three-dimensional electrode reactor

Electrochemical pretreatment of heavy oil refinery wastewater using a three-dimensional electrode reactor

Determination of reaction rate constants for phenol oxidation using SnO2/Ti anodes coupled with activated carbon adsorption in the presence of TiO2 as catalyst

Immersion Calorimetry Applied to the Study of the Adsorption of Phenolic Derivatives onto Activated Carbon Obtained by Pyrolysis of Potato Peel

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