Influence of anode material on the electrochemical oxidation of 2-naphthol

Panizza, Marco; Cerisola, G.

doi:10.1016/j.electacta.2004.02.036

Cited by 140 publications

(65 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ti/SnO 2 and BDD were much superior to Ti/IrO 2 , using the subjective parameter of odor reduction and the objective metric of TOC reduction (Table 1). Under anodic polarization, Ti/IrO 2 yields a surface layer of a higher oxide, possibly IrO 3 , which is the actual oxidant for the substrate, whereas BDD and Ti/ SnO 2 act as sources of hydroxyl radicals, from partial oxidation of water [5,[31][32][33][34]. Oxidation of substrate (RH) is initiated by OH, allowing efficient radical chain autooxidation by the molecular oxygen that is also present in the solution from electrolysis of water.…”

Section: Preliminary Experimentsmentioning

confidence: 99%

Evaluation of electrolysis for oxidative deodorization of hog manure

2005

View full text Add to dashboard Cite

Electrolysis was investigated as a method for the amelioration of odor from the supernatant phase of centrifuged liquid hog manure. Methods examined included the use of dual anodes to provide both oxidizing intermediates from water electrolysis and a sacrificial input of iron into solution to remove organic constituents of hog manure by coagulation. The most promising approaches used a ''dimensionally stable anode'' composed of tin dioxide coated on a base of titanium, and the newly developed material boron-doped diamond, which has an exceptional stability to both oxidizing and reducing electrolytic conditions. These anodes promote the formation of hydroxyl radicals which initiate oxidation of organic constituents of the manure.

show abstract

Section: Preliminary Experimentsmentioning

confidence: 99%

Evaluation of electrolysis for oxidative deodorization of hog manure

2005

View full text Add to dashboard Cite

show abstract

“…The Ti grid was first sandblasted and chemically etched with concentrated HCl. The lead dioxide was galvanostatically deposited using a single compartment cell and working at a current density of 20 mA cm -2 for 30 min [46]. In order to stabilise the electrode surface, a post-deposition treatment was applied to the PbO 2 films; the PbO 2 electrode potential was cycled between 0 and 1.8 V versus SCE in 0.5 M H 2 SO 4 medium until successive voltammetric curves were found to be identical.…”

Section: Electrolytic Systemsmentioning

confidence: 99%

Electrochemical process for the treatment of landfill leachate

2010

View full text Add to dashboard Cite

In this paper, the anodic oxidation of a real leachate from an old municipal solid waste landfill has been studied using an electrolytic flow cell equipped with a lead dioxide (PbO 2 ) anode and stainless steel as the cathode. The influence of several operation parameters such as (i) the applied current (from 0.5 to 3 A), (ii) liquid flow rate (from 50 to 420 L h -1 ), (iii) temperature (from 25 to 50°C), and (iv) pH (from 3.5 to 8.2) on the COD removal rate, current efficiency, and energy consumption has been evaluated. The galvanostatic electrolyses always yielded COD values below the discharge limit (COD \160 mg L -1 ); the COD removal rate increased with rising applied current, solution pH, and temperature, whereas it remained almost unaffected by the recirculation flow rate. These results indicate that the organic compounds were mainly removed by their indirect oxidation by the active chlorine generated from chlorides oxidation. The specific energy consumption necessary to reduce the organic load to below the disposal limit was 90 kWh m -3 .

show abstract

“…4,[18][19][20][21][22][23][24][25] According to the criteria discussed by Kapalka et al, 9 PbO 2 anodes could be classified as medium oxidation power anodes. In some cases, poor performance and problems like scaling and dissolution regarding Ti/PbO 2 electrodes were reported, 11,26 although these problems seem to be related to the substrate preparation.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, this anode in many instances has presented good performances in the degradation of organics, sometimes similar to that of a boron-doped diamond electrode. 4,[18][19][20][21][22][23][24][25] Classical and conventional methods of studying the influence of one variable at a time require a considerable number of experiments and are time consuming. Moreover, not all combinations of variables or all their levels are taken into account.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical degradation of the reactive red 141 dye on a β-PbO2 anode assessed by the response surface methodology

Aquino¹,

Rocha‐Filho²,

Bocchi³

et al. 2010

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

A degradação eletroquímica do corante Vermelho Reativo 141 foi investigada por meio da aplicação da metodologia de superfície de respostas, utilizando reator filtro-prensa com anodo de β-PbO 2 . A carga requerida para 90% de descoloração (Q 90 The electrochemical degradation of the Reactive Red 141 dye using a filter-press reactor with a β-PbO 2 anode was investigated through the application of the response surface methodology. The charge required for 90% decolorization (Q 90 ) and the chemical oxygen demand removal percentage after 30 min electrolysis (COD 30 ) were used to model the system. The investigated independent variables were the current density, pH, NaCl concentration, and temperature. Low ), when Cl 2 and HOCl are the predominant oxidant species. The best values of COD 30 were obtained at high current densities and acidic to neutral conditions (pH 5-7); however, the consequent energy consumption makes the process not economically feasible under these conditions. For strongly acidic solutions, specific energy consumptions associated to Q 90 as low as 0.79 kW h m -3 were attained.

show abstract

Influence of anode material on the electrochemical oxidation of 2-naphthol

Cited by 140 publications

References 31 publications

Evaluation of electrolysis for oxidative deodorization of hog manure

Evaluation of electrolysis for oxidative deodorization of hog manure

Electrochemical process for the treatment of landfill leachate

Electrochemical degradation of the reactive red 141 dye on a β-PbO2 anode assessed by the response surface methodology

Contact Info

Product

Resources

About