Electrochemical Oxidation of Aqueous Phenol Wastes on Synthetic Diamond Thin-Film Electrodes

Cañizares, Pablo; Díaz, M. Elena Poisot; Dominguez, J. A.; Garcı́a-Gómez, J.; Rodrigo, Manuel A.

doi:10.1021/ie0105526

Cited by 98 publications

(83 citation statements)

References 41 publications

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“…In order to reduce the mathematically complexity of theoretical models aimed to determine the concentrations of compounds involved in the oxidation process, Cañizares et al [38][39][40] considered some simplifying assumptions. Their model divides the electrochemical reactor into three zones: two close to the electrodes (electrochemical zones) and a third zone corresponding to the bulk of the solution (chemical zone) that can be considered as consecutive stirred-tank reactors.…”

Section: Kinetic Model Of Organics Mineralization On Bdd Anodesmentioning

confidence: 99%

Electrocatalysis in wastewater treatment: recent mechanism advances

Martínez‐Huitle¹,

Andrade²

2011

Quím. Nova

113

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Recebido em 23/9/10; aceito em 4/12/10; publicado na web em 25/3/11Over 50 years, several scientists and industries have developed new alternatives for wastewater treatment and remediation. Recently, electrochemical technology has been largely developed mainly because of its versatility and environmental compatibility. Scientific contributions about role of the electrode material have allowed determining that the influence of material in the selectivity is an important parameter. However, to interpret this behavior, comprehensive physical chemistry models for organics destruction, related to electrochemical phenomena and material surfaces, were proposed in the last decades. So, this paper presents a critical and comprehensive review about the principles and recent mechanism advances in electrocatalysis for wastewater treatment.

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Section: Kinetic Model Of Organics Mineralization On Bdd Anodesmentioning

confidence: 99%

Electrocatalysis in wastewater treatment: recent mechanism advances

Martínez‐Huitle¹,

Andrade²

2011

Quím. Nova

113

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“…Electrochemical degradation (ECD) is one of the alternatives for degradation of these compounds, and is suitable for low-volume application and environmental compatibility [4]. In recent years, electrochemical oxidation of aqueous wastes containing non-biodegradable organics such as phenol [5], chlorophenols [6] and aniline [7] has been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic oxidation of nitrophenols in aqueous solution using modified PbO2 electrodes

Liu

Zhang

et al. 2007

J Appl Electrochem

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Various kinds of modified lead dioxide (PbO 2 ) electrodes, doped with bismuth oxides and cobalt oxides, were prepared by electrodeposition in acid solution, and were characterized in terms of their morphological (SEM) and structural (XRD) features. Mineralization experiments on o-nitrophenol (ONP) in an electrocatalytic oxidation system showed that the electrocatalytic activity of Ti/BiPbO 2 was superior to the traditional dimensionally stable anodes (DSAs) Ti/b-PbO 2 and other modified PbO 2 electrodes. The mineralization, reaction kinetics and nitrogroup transformation of nitrophenols (ONP, p-nitrophenol (PNP) and m-nitrophenol (MNP)) on Ti/Bi-PbO 2 electrodes were studied and compared. NPs were degraded completely under the present experimental conditions by applying a 30 mA cm -2 current density at pH 4.3 in 0.1 M Na 2 SO 4 and 0.01 M NaCl. The degradation of NPs lay in the order: ONP [ MNP [ PNP. A simple degradation mechanism model is proposed.

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“…Studies were carried out on the influence of different electrode materials such as Pt, Au, Ni, Cu, DSA-O 2 (dimensionally stable anode), PbO 2 and boron-doped diamond electrodes, on phenolics and lignin electro-oxidation reactions (Kovalenko et al, 1977;Parpot et al, 2000;Canizares et al, 2002;Iniesta et al, 2001). Early studies on graphite, copper, platinum and nickel anodes showed that platinum and nickel produced higher amounts of aldehyde and a comparison of the nickel and DSA-O 2 anodes, at the same high current densities of 750 A/m 2 , showed that nickel produced a higher concentration of vanillin per unit of charge used (Kovalenko et al, 1977;Parpot et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

The electro-oxidation of lignin in Sappi Saiccor dissolving pulp mill effluent

Moodley¹,

Mulholland²,

Brookes³

2011

WSA

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Electro-oxidation reactions using a nickel anode were carried out on the calcium-spent liquor effluent obtained from Sappi Saiccor (formerly South African Industrial Cellulose Corporation) dissolving pulp mill as well as on lignin-and lignan-type compounds previously identified in the effluent. Voltammograms were obtained for each solution in order to identify the oxidation potentials of the compounds to be electro-oxidised. Value-added products such as vanillin and syringaldehyde were identified in the electro-oxidised reaction mixtures using gas chromatography-mass spectrometry (GC-MS) and high performance liquid chromatography (HPLC). Profiles of the changes in concentration of these compounds were determined as a function of time with maximum concentrations reached within the first half hour. These findings are significant in that few electro-oxidation reactions have been carried out on the effluent of a pulp mill which uses the acid bisulphite pulping process and no results have previously been reported on the electro-oxidation of syringaldehyde. This study contributes to a further understanding of the electro-oxidation of lignin and is of value to the paper and pulp industry at large. Reduction of the organic content of the effluent by electro-oxidation was shown to be possible.

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Electrochemical Oxidation of Aqueous Phenol Wastes on Synthetic Diamond Thin-Film Electrodes

Cited by 98 publications

References 41 publications

Electrocatalysis in wastewater treatment: recent mechanism advances

Electrocatalysis in wastewater treatment: recent mechanism advances

Electrocatalytic oxidation of nitrophenols in aqueous solution using modified PbO2 electrodes

The electro-oxidation of lignin in Sappi Saiccor dissolving pulp mill effluent

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