Electrochemical Treatment of Industrial Wastewater Containing Phenols

Iniesta, Jesús; Expósito, Eduardo; González-Garcı́a, José; Montiel, Vicente; Aldaz, A.

doi:10.1149/1.1464136

Cited by 66 publications

(44 citation statements)

References 12 publications

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“…Among the different techniques for wastewater treatment, electrochemical methods have achieved a relevant position [2][3][4][5][6][7][8][9][10][11] and the most applied technologies are the oxidation of organic pollutants by cathodic generation of hydrogen peroxide [12][13][14], the anodic oxidation using different electrodes [15][16][17], the cathodic removal of metals [18] and the electrocoagulation [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical treatment of wastewater from almond industry using DSA-type anodes: Direct connection to a PV generator

Valero

García-García

Expósito

et al. 2014

Separation and Purification Technology

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Please cite this article as: D. Valero, V. García-García, E. Expósito, A. Aldaz, V. Montiel, Electrochemical treatment of wastewater from almond industry using dsa-type anodes: direct connection to a pv generator, Separation and Purification Technology (2013), doi: http://dx.doi.org/10.1016/j.seppur. 2013.12.023 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ELECTROCHEMICAL TREATMENT OF WASTEWATER FROM ALMOND INDUSTRY USING DSA-TYPE ANODES: DIRECT CONNECTION TO A PV GENERATOR ABSTRACTFood industries such as almond industry generate large volumes of wastewater in their processes and common techniques are not always efficient for treating this kind of effluents. In this work, the feasibility of a treatment for pollutants removal of a real industrial wastewater by electrochemical oxidation s studied at laboratory scale and then scaled-up to pre-industrial scale. The first stage of the work was performed at laboratory scale, using a 63 cm 2 cell, where different anodes (Ti/Pt, and DSA anodes (Ti/RuO 2 and Ti/IrO 2 )) and the optimal experimental conditions (pH, current density, temperature and In the second stage the scaling-up of the process from laboratory to pre-industrial scale was performed, by using a 3300cm 2 cell. The electrochemical reactor was finally powered by a photovoltaic generator directly connected, in order to operate by using a renewable energy and a COD elimination of 80 % was achieved.

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Section: Introductionmentioning

confidence: 99%

Electrochemical treatment of wastewater from almond industry using DSA-type anodes: Direct connection to a PV generator

Valero

García-García

Expósito

et al. 2014

Separation and Purification Technology

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“…Phenol has been used as a model compound to evaluate the anode performance towards electrochemical oxidation using different electrocatalytic materials, operational conditions, and indirect methods (Iniesta et al, 2002). Furthermore, the use of BDD and DSA for organic degradation has been reviewed by several authors (Martínez-Huitle and Ferro, 2006;Martínez-Huitle and Andrade, 2011).…”

Section: Introductionmentioning

confidence: 99%

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Britto-Costa

Ruotolo

2012

Braz. J. Chem. Eng.

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-Industrial wastewater containing non-biodegradable organic pollutants consists of highly toxic effluents whose treatment is necessary due to environmental and economical restrictions. In order to treat these effluents, an electrochemical process using a dimensionally stable anode (DSA ® ) and boron-doped diamond (BDD) electrode was studied. The performance of these electrodes for COD removal from aqueous phenol solution was evaluated in the absence and presence of different chloride concentrations. The results showed that DSA ® could be successfully used to remove COD when high chloride concentration (3035 mg L -1 Cl -) and mild current density are employed (50 mA cm -2 ). On the other hand, the presence of chloride did not have the same significant effect on the COD depletion rate using BDD; however, under mild conditions (50 mA cm -2 , 0.190 m s -1 ), the addition of 607 mg L -1 Cl -improved the COD removal by approximately 52% after 8 hours of electrolysis. The effect of current density (i) and flow velocity (v) were also studied, and it was verified that they have an important role on the process performance, especially when DSA ® is used.

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“…These electrodes have high overvoltage for the oxygen evolution reaction ͑OER͒ and promote the oxidation of organic compounds by OH · radicals that are present in high concentration near the electrode surface. 10 Typical "nonactive" layers employed in water remediation are PbO 2 , 11,12 borondoped diamond ͑BDD͒, 8,13,14 and Sb-doped SnO 2 .…”

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confidence: 99%

Evaluation of the Electrocatalytic Activity of Antimony-Doped Tin Dioxide Anodes toward the Oxidation of Phenol in Aqueous Solutions

Montilla

Morallón

Vázquez

2005

J. Electrochem. Soc.

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Antimony-doped tin dioxide electrodes supported on titanium have been used in the electrochemical treatment of aqueous solution containing phenol. Ti/SnO 2 -Sb anode has high efficiency in the elimination of phenol, but its use is hindered by its short service life. The introduction of platinum in the oxide layer ͑3 or 13 atom %͒ increases the electrode service life up to two orders of magnitude. The electrocatalytic activity of the electrodes toward phenol oxidation has been analyzed with respect to the amount of platinum in the electrode composition. Voltammetric studies show that the oxidation potential of phenol decreases with the amount of platinum in the oxide layer. The activity for phenol oxidation per electroactive site is higher with the Sb-doped SnO 2 electrode within the zone of electrochemical stability of the solvent. Galvanostatic electrolysis of phenol solutions was performed analyzing several factors that affect the efficiency of the elimination process, such as anode composition, cell design, current density, and phenol concentration. The electrode containing platinum ͑3 atom %͒ presents the highest efficiency for phenol removal, even higher than Sb-doped SnO 2 .

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Electrochemical Treatment of Industrial Wastewater Containing Phenols

Cited by 66 publications

References 12 publications

Electrochemical treatment of wastewater from almond industry using DSA-type anodes: Direct connection to a PV generator

Electrochemical treatment of wastewater from almond industry using DSA-type anodes: Direct connection to a PV generator

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Evaluation of the Electrocatalytic Activity of Antimony-Doped Tin Dioxide Anodes toward the Oxidation of Phenol in Aqueous Solutions

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